WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

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Well structured WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry can serve as a valuable review tool before exams.

Inorganic Chemistry in the Laboratory and in Industry Class 10 WBBSE MCQ Questions

(a) Ammonia

Multiple Choice Questions :

Question 1.
Ammonia is : ……………
(A) acidic
(B) basic
(C) neutral
(D) amphoteric
Answer:
(B) basic

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 2.
The reaction N2 + 3H2 = 2NH3 is ……………
(A) exothermic
(B) endothermic
(C) neither of the two
(D) Both of the two
Answer:
(A) exothermic

Question 3.
Liquid ammonia is used in refrigerators because : ……………
(A) It has a high dipole moment
(B) It has a high heat of evaporation
(C) of its basicity
(D) of its stability
Answer:
(B) It has a high heat of evaporation

Question 4.
High heat of vaporization of ammonia is due to its : ……………
(A) basic nature
(B) polar nature
(C) hydrogen bonding
(D) high solubility
Answer:
(C) hydrogen bonding

Question 5.
In the Ostwald process for the manufacture of HNO3
(A) air is blown into an electric arc
(B) ammonia is catalytically oxidized
(C) chile saltpetre is treated with cone. H2SO4
(D) NaNO3 is treated with cone. H2SO3
Answer:
(B) ammonia is catalytically oxidized

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 6.
Which of the following statements is correct for the manufacture of ammonia by Haber’s process ?
(A) Low temperature, high pressure, presence of catalyst.
(B) High temperature, high pressure and catalyst
(C) Low temperature and pressure
(D) High temperature and low pressure
Answer:
(A) Low temperature, high pressure, presence of catalyst

Question 7.
Ammonia water makes a good cleaning agent because it: ……………
(A) is weakly basic
(B) emulsifies grease
(C) leaves no residue when wiped out
(D) all are true
Answer:
(D) all are true

Question 8.
A mixture of ammonia and air at about 800°C in the presence of Pt gauze forms : ……………
(A) N2O
(B) NO
(C) NH2OH
(D) NO
Answer:
(B) N2O3

Question 9.
Ammonium ion in solution is detected by ……………
(A) Brown-ring test
(B) Molish’s test
(C) Nessler’s solution
(D) Fehling’s solution
Answer:
(C) Nessler’s solution

Question 10.
The substance used for drying ammonia gas in the laboratory ……………
(A) cone. H2SO4
(B) P2O2
(C) quick lime
(D) silica gel
Answer:
(C) quick lime

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 11.
Non-combustible hydride is : ……………
(A) NH3
(B) PH3
(C) ASH3
(D) SbH3
Answer:
(A) NH3

Question 12.
Which is most explosive ?
(A) NCl3
(B) PCl3
(C) ASCl3
(D) All
Answer:
(A) NCl3

Question 13.
Ammonia gas is prepared in the laboratory by the action of slaked lime on ……………
(A) NH4Cl
(B) (NH4)2SO4
(C) NH4Cl + NaNO3
(D) NH4NO3
Answer:
(A) NH4Cl

Question 14.
With excess of Cl2 ammonia gives
(A) NCl3
(B) HCl
(C) NH4Cl
(D) N2O
Answer:
(A) NCl3

Question 15.
How NH3 is generally manufactured for fertilizers ?
(A) by reducing the by product HNO3
(B) passing a mixture of N2 and H2 under high pressure and moderate temperature over a catalyst
(C) by passing an electric discharge in the mixture of H2 and N2
(D) 2NH4Cl + Ca(OH)2 → CaCl2 + 2NH3 + 2H2O
Answer:
(B) passing a mixture of N2 and H2 under high pressure and moderate temperature over a catalyst

Question 16.
Liquid NH3 bottles are opened only after cooling for some time. This is because :
(A) NH3 is corrosive liquid
(B) it is a mild explosive
(C) it brings tears in eyes
(D) it generates high vapour pressure.
Answer:
(D) it generates high vapour pressure

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 17.
Aqueous solution of ammonia consists of :
(A) H+
(B) OH–
(C) NH
(D) NH4++ OH–
Answer:
(D) NH4++ OH–

Question 18.
The vapour density of ammonia is:
(A) 7
(B) 7.5
(C) 8.5
(D) 17
Answer:
(C) 8.5

Question 19.
Nessler’s reagent is :
(A) K2Hgl4
(B) K2Hgl4 + KOH
(C) K2Hgl4
(D) K2Hgl4 + KOH
Answer:
(B) K2Hgl4 + KOH

Question 20.
Cupric hydroxide dissolves in aqueous ammonia due to
(A) reduction to cuprous hydroxide
(B) complex formation
(C) increase in pH
(D) the amphoteric nature of Cu(OH)2
Answer:
(B) complex formation

Question 21.
The blue complex formed on addition of cone. NH4OH solution to a Cu2+ salt solution has the structure :
(A) \(\left[\mathrm{Cu}\left(\mathrm{NH}_4\right)_4\right]^{2+}\)
(B) \(\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_2\right]^{2+}\)
(C) \(\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}\)
(D) \(\left[\mathrm{Cu}\left(\mathrm{NH}_4\right)_2\right]^{2+}\)
Answer:
(C) \(\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}\)

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 22.
On addition of NH4OH to a copper sulphate solution :
(A) blue precipitate of copper hydroxide is obtained
(B) black precipitate of copper oxide is obtained
(C) a deep blue solution is obtained
(D) no change is observed
Answer:
(C) a deep blue solution is obtained

Question 23.
In which the ammonia is not used ?
(A) Cold storage
(B) Anaesthetic
(C) Manufacture of rayon and plastic
(D) None of these.
Answer:
(B) Anaesthetic

Question 24.
In the reaction : \(\mathbf{N}_2+3 \mathrm{H}_2 \rightleftharpoons 2 \mathrm{NH}_3,\) the catalyst used is :
(A) Pt and Cu
(B) Fe and Mo
(C) NO + Pt
(D) Ni + Ti
Answer:
(B) Fe and Mo

Question 25.
Ammonia can be obtained by heating ammonium sulphate with :
(A) KOH
(B) NaCl
(C) CaCl2
(D) ZnSO4
Answer:
(A) KOH

Question 26.
Ammonia is collected by :
(A) downward displacement of water
(B) downward displacement of air
(C) upward displacement of air
(D) by downward displacement of hot water
Answer:
(B) downward displacement of air

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 27.
Ammonia is :
(A) basic
(B) acidic
(C) neutral
(D) insoluble in water
Answer:
(A) basic

Question 28.
Ammonium chloride and Ca(OH)2 on heating produce :
(A) N2
(B) NO2
(C) NH3
(D) NO
Answer:
(C) NH3

Question 29.
Liquid ammonia contains :
(A) 35% NH3
(B) 60% NH3
(C) 80% NH3
(D) 0.0% NH3
Answer:
(A) 35%NH3

Fill in the blanks

1. Ammonia gas is prepared by heating on ammonium salt mixed with a strong ……………………..
Answer:
base

2. Ammonia produces a white cloud with ……………………. acid.
Answer:
hydrochloric

3. Ammonia turns red litmus solution ……………………..
Answer:
blue

4. Ammonia has a typical ……………………. smell.
Answer:
pungent

5. Aqueous solution of ammonia is …………………….
Answer:
alkaline

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

6. A ……………. aqueous solution of ammonia is called liquor ammonia.
Answer:
Concentrated

7. Ammonia gas when passed over heated sodium, amide salt and ……………. gas produce.
Answer:
hydrogen

8. Since ammonia gas is …………….than air, it is collected by downward displacement of air.
Answer:
lighter

9. Ammonia is dried by passing through …………….
Answer:
quick lime

10. Ammonia is ………………. soluble in water.
Answer:
highly

11. In ammonia we have nitrogen and ……………..
Answer:
hydrogen

12. Ammonia gas is passed over heated black cupric oxide which is reduced to red metallic …………….
Answer:
copper

13. 2NH3Cl + Ca(OH)2 = _________ + CaCl2 + 2H2O
Answer:
2NH3

14. When excess chlorine reacts ammonia forming nascent nitrogen which again combines with chlorine producing, ………… an oily yellow explosive compound.
Answer:
nitrogen trichloride.

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

15. ………… gas is obtained by heating ammonium sulphate with sodium hydroxide.
Answer:
Ammonia

16. ………… reagent is used for the identification of ammonia.
Answer:
Nessler’s

17. Ammonia is ………… for eyes.
Answer:
harmful

18. Ammonia gas is collected by the ………… displacement of air.
Answer:
downward.

19. Ammonia is dried with …………
Answer:
calcium oxide.

20. When ammonia leaks from factory we should wash our eyes with …………….
Answer:
water.

21. is an inorganic fertilizer which is produced from ammonia.
Answer:
Ammonium sulphate [(NH4)2SO4]

22. is an organic fertilizer which is produced from ammonia.
Answer:
Urea [CO(NH2)2]

23. HNO3 ………… is manufactured from ammonia by process.
Answer:
Ostwald.

(b) Sulphuretted Hydrogen (H2S)

Multiple Choice Questions :

Question 1.
Which of the following oxidation states is applicable to sulphur in H2S?
(A) -2
(B) +5
(C) +6
(D) +3
Answer:
(A) -2

Question 2.
An example of non-linear molecule is :
(A) H2S
(B) CO2
(C) C2H2
(D) N2O
Answer:
(A) H2S

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 3.
H2S on Incomplete combustion forms mainly
(A) HO and S
(B) H and SO2
(C) H2S and S
(D) H2O and SO2
Answer:
(C) H2S and S

Question 4.
H2S is a: ……….
(A) weak dibasic acid
(B) strong dibasic acid
(C) weak monobasic acid
(D) monobasic
Answer:
(C) Weak dibasic acid

Question 5.
When QuestionH2S is passed through acidified KMnO4
(A) KHSO2
(B) K2SO4
(C) MnO2
(D) S
Answer:
(D) S

Question 6.
Which of the following turns lead acetate paper black?
(A) SO2
(B) SO3
(C) H2S
(D) H2SO4
Answer:
(C) H2S

Question 7.
Sulphuretted hydrogen was discovered by:
(A) Shele
(B) Dalton
(C) Lavoisier
(D) Richter
Answer:
(A) Shele

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 8.
H2S is :
(A) alkaline
(B) neutral
(C) acidic
(D) amphoteric gas
Answer:
(C) acidic

Question 9.
When a strip of filter paper, soaked in colourless lead acetate solution, is held in the H2S gas the filter paper becomes
(A) black
(B) blue
(C) pink
(D) red
Answer:
(A) black

Question 10.
Molecular weight of H2S is:
(A) 32
(B) 34
(C) 36
(D) 38
Answer:
(A) 34

Question 11.
FeS reacts with
(A) dil. H2SO4
(B) Conc. H2SO4
(C) Conc.HNO3 to form H2S
(D) None of these
Answer:
(A) dil. H2SO4

Question 12.
H2S is passed through a added to it. The solution
(A) violet
(B) black
(C) green
(D) red
Answer:
(A) violet

Question 13.
H2S gas has a smell:
(A) like roften eggs
(B) pungent
G smell like fish none of these
Answer:
(C) smell like fish

Question 14.
H2S is: ……………
(A) heavier
(B) lighter
(C) slightly heavier than air
(D) none of these
Answer:
(C) smell like fish

Question 15.
Aqueous soution of the gas turns blue litmus to red:
(A) H2S
(B) NH3
(C) O2
(D) H2
Answer:
(A) H2S

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 16.
H2S can be collected in downward displacement of
(A) hot water
(B) cold water
(C) Hg
(D) none of these
Answer:
(A) hot water

Question 17.
mejas which is identified by its smell:
(A) Nitrogen
(B) Hydrogen
(C) Hydrogen sulphide
(D) None of these
Answer:
(C) Hydrogen sulphide

Question 18.
The gas which has reducing property:
(A) H2S
(B) CO2
(C) NO2
(D) none of these
Answer:
(A) H2S

Question 19.
H2S gas is passed through :
(A) P2O5
(B) Anhydrous CaCl2
(C) CaO
(D) none of these
Answer:
(A) P2O5

Question 20.
The gas which is absorbed by NaOH :
(A) NH3
(B) H2S
(C) O2
(D) None of these
Answer:
(B) H2S

Fill in the Blanks:

1. H2S is a gas having the smell of ……………………
Answer:
rotten egg

2. H2S is a good ………….. agent.
Answer:
reducing

3. Hydrogen sulphide is a combustible gas but not a supporter of ……………..
Answer:
combustion

4. H2S reduces acidified yellow solution of ferric chloride to colourless chloride.
Answer:
ferrous

5. Aqueous solution of H2S is a mild acid, it turns blue ……………. red.
Answer:
litmus

6. H2S gas has the characteristic unpleasant smell of rotten
Answer:
egg

7. H2S + H2SO4 (cone.) = S + ……………. + 2H2O
Answer:
SO2

8. Pb(CH2COO)2 + H2S = ……………….. +2 CH2COOH
Answer:
PbS

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

9. H2S gas turns lead acetate ……………..
Answer:
black

10. H2S gas is 1.5 times heavier than ……………..
Answer:
air

11. Dilute H2SO4 is preferred to dilute HCl acid, for the latter is very ……………..
Answer:
volatile

12. Presence of ………………… gas in the atmosphere in traces tarnishes silver to black silver sulphide.
Answer:
H2S

13. On passing H2S gas through zinc salt solution in ………………… medium sulphide of zinc gets precipitated.
Answer:
basic

14. Hydrogen sulphide reduces concentrated sulphuric acid to …………………
Answer:
SO2

15. Hydrogen sulphide reduces concentrated nitric acid to …………………
Answer:
NO2

16. Molecular formula of sulphuretted hydrogen is …………………
Answer:
H2S

17. ………………… is used in order to dry H2S.
Answer:
P2O5

18. H2S is appreciable soluble in ………………… water, but practically insoluble in not water.
Answer:
cold                                                                                                                     .

19. H2S is a weak ………………… acid.
Answer:
dibasic

(c) Nitrogen

Multiple choice questions (MCQ) :

Question 1.
The boiling point of liquid nitrogen is
(A) 0°C
(B) – 195.7°C
(C) – 180°C
(D) – 273°C
Answer:
(B) – 195.7°C

Question 2.
Chlorine present as impurity in nitrogen gas is removed by :
(A) Conc. NaOH
(b) Conc. H2SO4
(C) P2O5
(D) KNO3
Answer:
(A) Conc. NaOH

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 3.
The formula of an Inorganic fertilizer containing nitrogen is :
(A) NH4Cl
(B) (NH4)2SO4
(C) HCN
(D) Pb(NO3)2
Answer:
(B) (NH4)2SO4

Question 4.
How is nitrogen gas dried :
(A) Passing through conc.H2SO4
(B) By heating the gas in a vessel
(C) P2O5
(D) CaCl4
Answer:
(A) Passing through conc.H2SO4

Question 5.
What is the product of combination of nitrogen with calcium carbidc?
(A) calcium nitride
(B) calcium nitrate
(C) calcium nitrite
(D) calcium cyanamide
Answer:
(D) calcium cyanamide

Question 6.
How does nitrogen combine with oxygen :
(A) The two gases combine at a very high temperature under electric spark
(B) The two gases directly combine in presence of sunlight
(C) In absence of sunlight
(D) In presence of iron catalyst.
Answer:
(A) The two gases combine at a very high temperature under electric spark

Question 6.
How does nitrogen combine with oxygen :
(A) The two gases combine at a very high temperature under electric spark
(B) The two gases directly combine in presence of sunlight
(C) In absence of sunlight
(D) In presence of iron catalyst.
Answer:
(A) The two gases combine at a very high temperature under electric spark

Question 7.
What is the necessity of presence of ñttrogen in air:
(A) Nitrogen helps respiration of plants
(B) Nitrogen helps respiration of animals
(C) Nitrogen helps to burn
(D) Nitrogen helps to control burning in air.
Answer:
(D) Nitrogen helps to control burning in air

Question 8.
Why is not nitrogen gas prepared by heating NH4NO2 directly :
(A) Rapid explosive dissociation takes place
(B) Nitrogen gas is not obtained
(c) Nitrogen gas combines with oxygen in air
(D) None of these.
Answer:
(A) Rapid explosive dissociation takes place

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 9.
At ordinary temperature nitrogen is ________
(A) reactive
(B) inert
(C) very-active
(D) None of these.
Answer:
(B) inert

Question 10.
The solubility of nitrogen in water is :_______
(A) low
(B) very low
(C) high
(D) very high
Answer:
(B) very low

Question 11.
Nitrogen is ______
(A) heavier
(B) lighter
(C) slightly heavier
(D) slightly lighter than air
Answer:
(D) slightly lighter

Question 12.
The conversion of Nitrogen gas to liquid nitrogen is :_____________
(A) possible
(B) impossible
(C) easily possible
(D) possible but difficult
Answer:
(D) possible but difficult

Question 13.
Which of the following compounds is used as fertilizer ?
(A) calcium carbide
(B) calcium chloride
(C) magnesium nitride
(D) nitrolim
Answer:
(D) nitrolim

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 14.
Who discovered nitrogen_______
(A) Daniel Rutherford
(B) Bohr
(C) Dalton
(D) Lavoisier
Answer:
(A) Daniel Rutherford

Question 15.
Nitrogen containing organic fertilizer is :________
(A) nitrolim
(B) ammonium sulphate
(C) ammonium nitrate
(D) urea
Answer:
(D) urea

Question 16.
The requisite chemicals for the preparation of nitrogen :___________
(A) NH4Cl and Ca(OH)2
(B) NaNO2 and NH4Cl
(C) (NH4)2SO4 and NaOH
(D) NH4CL and NaOH
Answer:
(B) NaNO2 and NH4Cl

Question 17.
Nitrogen gas is collected by :___________
(A) downward displacement of water
(B) downward displacement of air
(C) upward displacement of air
(D) None of these
Answer:
(A) downward displacement of water

Question 18.
Percentage of nitrogen in air by volume is :_______
(A) 20
(B) 30
(C) 78
(D) 88
Answer:
(C) 78

Fill in the blanks

1. Solubility of nitrogen in water is very___________
Answer:
low

2. Nitrogen is a_________ gas._____________
Answer:
colourless

3. Liquid nitrogen is used as ________
Answer:
Condenser

4. 3Mg + N2 =…………………
Answer:
Mg3N2

5. N2 + ________  = 2NH3
Answer:
3H2

6. CaC2 + N2 = ________  + C
Answer:
CaCN2

7. _______ has main role in protein synthesis.
Answer:
Nitrogen

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

8. The density of nitrogen gas is _____ g/L at NTP.
Answer:
1-25

9. Nitrogen is slightly _______  than air.
Answer:
lighter

10. Solubility of nitrogen in water is about ________  ml/L at NTP.
Answer:
23.5

11. With the help of electric spark nitrogen combines with oxygen at about 3000°C to produce ………..
Answer:
nitric oxide.

12. Nitrolim reacts with steam to form calcium carbonate and__________
Answer:
ammonia.

13. Ammonium nitrite decomposes into nitrogen and __________  due to heating.
Answer:
water

14. Nitrogen gas is passed over concentrated_______ acid where by dry nitrogen is obtained.
Answer:
sulphuric

15. Nitrogen gas is collected by the _________  displacement of water.
Answer:
downward.

16. Nitrogen is relatively_________ element
Answer:
non-reactive

17. Natural source of nitrogen is  _______
Answer:
air

18. The requisite chemicals used for the preparation of nitrogen are sodium nitrite and ______
Answer:
ammonium chloride.

19. Nitrogen was discovered by ________  in 1772.
Answer:
Daniel Rutherford

20. Nitrogen combines with oxygen forming nitric oxide under the influence of electric arc at a temperature of _________
Answer:
3000°C…….

21. Nitrogen combines with hydrogen in presence of electric sparks to produce ________
Answer:
Ammonia

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

22. When calcium carbide is heated in a current of nitrogen at temperature of ………….. calcium cyanamide and carbon are formed.
Answer:
1100°C

(d) Hydrogen Chloride (Hydrochloric acid), Nitric acid and Sulphuric acid

Multiple choice questions (MCQ) :

Question 1.
How does copper react with sulphuric acid ?
(A) Copper reacts with sulphuric acid in all forms
(B) Copper reacts with hot and concentrated sulphuric acid
(C) Copper reacts with dilute sulphuric acid
(D) None of these
Answer:
(B) copper reacts with hot and concentrated sulphuric acid.

Question 2.
What is passive iron and how it produces ?
(A) Chemically inactive iron is passive iron. It produces as insoluble coating of Fe3O4 forms on iron in contact with nitric acid
(B) Iron is inactive with all acids, so iron is passive
(C) It forms Fe2O3
(D) None of these
Answer:
(A) Chemically inactive iron is passive iron. It produces as insoluble coating of Fe3O4 forms on iron in contact with nitric acid.

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 3.
In contact process for the production of H2SO4 on an industrial scale, the impurities of arsenic are removed by :
(A) Fe2O3
(B) Al(OH)3
(C) Fe(OH))3
(D) Cr(OH)3
Answer:
(C) Fe(OH)3

Question 4.
The conversion of SO2 by O2 into SO3 is :_____
(A) an irreversible reaction
(B) an endothermic reaction
(C) an exothermic reaction
(D) none of these
Answer:
(C) An exothermic reaction

Question 5.
The most favourable condition for the conversion of
\(2 \mathrm{SO}_2+\mathrm{O}_2 \rightleftharpoons 2 \mathrm{SO}_3+98\) KJ/mole is:_____
(A) low temperature and high presure
(B) high temperature and low pressure
(C) high temperature and high pressure
(D) low temperature and low pressure
Answer:
(A) Low temperature and high pressure

Question 6.
In the contact process, sulphur trioxide is dissolved in :
(A) water
(B) dilute sulphuric acid
(C) cone sulphuric acid
(D) none of these
Answer:
(C) Cone., sulphuric acid

Question 7.
Which of the following statements concerning the manufacture of sulphuric acid is false ?
(A) Sulphur is burnt in air to produce SO2
(B) SO2 is catalytically oxidised to SO3
(C) SO3 is dissolved in water to get 100% sulphuric acid
(D) The lead chamber process for its manufacture is not much in use these days.
Answer:
(C) SO3 is dissolved in water to get 100% sulphuric acid

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 8.
Contact process is superior to chamber process for the manufacture of sulphuric acid as it:
(A) provides acid of any concentration
(B) gives acid of low concentration
(C) provides impure acid
(D) Occupies large space
Answer:
(A) provides acid of any concentration

Question 9.
Oleum is :
(A) H2SO5
(B) H2S2O7
(C) H2S2O8
(D) H2SO3
Answer:
(B) H2S2O7

Question 10.
Oil of vitriol is :
(A) H2SO3
(B) H2SO4
(C) H2S2O7
(D) H2S2O8
Answer:
(B) H2SO4

Question 11.
Which is not correct in case of H2SO4 ?
(A) Oxidising agent
(B) Reducing agent
(C) Sulphonating agent
(D) Dehydrating agent
Answer:
(B) Reducing agent

Question 12.
Cone. H2SO4 is not :
(A) hygroscopic
(B) dehydrating agent
(C) sulphonating agent
(D) efflorescent
Answer:
(D) efflorescent

Question 13.
Catalyst used In the manufacture of H2SO4 by lead chamber process is: _________
(A) V2O5
(B) Pt
(C) Ni
(D) oxides of nitrogen
Answer:
(D) oxides of nitrogen

Question 14.
When sugar is treated with cone. H2SO4 the sugar becomes black due to;
(A) dehydration
(B) hydration
(C) hydrolysis
(D) decolourisation
Answer:
(D) decolourisation

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 15.
Electrolysis of…. pure H2SO4 produces at anode :
(A) H2S2O5
(B) H2S4O6
(C) H2S2O8
(D) H2
Answer:
(C) H2S2Os

Question 16.
When charcoal is heated with cone H2SO4 
(A) there is no reaction
(B) CO2 and SO2 are evolved
(C) water gas is formed
(D) CO2 and SO2 are not evolved
Answer:
(B) CO2 and SO2 are evolved

Question 17.
Fuming sulphuric acid is commercially known as: ______
(A) Carro’s acid
(B) Marshall’s acid
(C) Oleum
(D) Sulphurous acid.
Answer:
(C) Oleu

Question 18.
Which of the following gives carbon with cone. H2SO4?
(A) Ethyl alcohol
(B) Starch
(C) Formic acid
(D) Oxalic acid
Answer:
(C) Formic acid

Question 19.
King of chemicals is
(A) H2SO4
(B) Oxalic acid
(C) HNO3
(D) NaOH
Answer:
(A) H2SO4

Question 20.
Sulphuric acid is a dibasic in nature, hence it forms :
(A) acidic salt
(B) acidic and basic salt
(C) acidic and normal salt
(D) double salt.
Answer:
(C) acidic and normal salt

Question 21.
The main difference between nitric acid and hydrochloric acid lies in their reaction of
(A) nitrates
(B) chlorides
(C) metals
(D) bicarbonates
Answer:
(C) metals

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 22.
The most volatile compound among the following is :
(A) HF
(B) HCl
(c) HBr
(d) Hl
Answer:
(B) HCl

Question 23.
Cone. HNO3 oxidises phosphorus to: …………..
(A) H3PO4
(B) P2O5
(C) H2PO3
(D) H4P2O7
Answer:
(A) H3PO4

Question 24.
When concentrated HNO3 is heated, it decomposes to give :
(A) O2 and N2
(B) NO
(C) O
(D) NO2 and O2
Answer:
(D) NO2 and O2

Question 25.
Aqua fortis is :
(A) HNO3
(B) HNO2
(C) H2NO3
(D) H2N2O2
Answer:
(A) HNO3

Question 26.
The process used to manufacture nitric acid is :
(A) Solvay process
(B) Ostwald process
(C) Hall process
(D) Haber process
Answer:
(B) Ostwald process

Question 27.
‘Sulphan’ is …………..
(A) 20% oleum
(B) 80% oleum
(C) 100% oleum
(D) 88% oleum
Answer:
(C) 100% oleum

Question 28.
Specific gravity of liquor ammonia is :________
(A) 0.80
(B) 0.44
(C) 0.88
(D) 0.66
Answer:
(C) 0.88

Question 29.
In Haber’s process, the product is :_____
(A) CO(NH2)2
(B) NH3
(C) HNO3
(D) H2SO4
Answer:
(B) NH3

Question 30.
Which of the following responds in nitroprusside test?
(A) HCl
(B) NH3
(C) N2
(D) H2S
Answer:
(D) H2S

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

Question 31.
The optimum temperature for industrial preparation of H2SO4 is :___
(A) 650°c
(B) 850°c
(C) 450°c
(D) 250°c
Answer:
(C) 450°c

Question 32.
Raw material for manufacture of HCl by Le Blanck process is :_____
(A) NaCl
(B) Na2SO4
(C) NH4Cl
(D) CaCl2
Answer:
(A) NaCl

Question 33.
Which of the following gases can be prepared by kipp’s apparatus?
(A) N2
(B) H2S
(C) HCl
(D) NH3
Answer:
(B) H2S

Question 34.
Choose the wrong statement :
(A) H2S is a yellow cofoured gas
(B) H2S is heavier than air
(C) H2S has rotten egg like smell
(D) The aqueous solution of H2S is acidic
Answer:
(A) H2S is a yellow coloured gas

Question 35.
Choose the wrong statement :
(A) Ammonia is a colourless gas
(B) Ammonia is heavier than air
(C) Ammonia is highly soluble in water
(D) Ammonia can be easily liquefied by applying pressure.
Answer:
(B) Ammonia is heavier than air

Question 36.
Which one of the following is not a fertilizer?
(A) ammonia
(B) ammonium phosphate
(C) ammonium nitrate
(D) ammonium sulphate
Answer:
(A) ammonia

Fill in the blanks

1. In contact process, during the preparation of SO3 from SO2__________ is used as catalyst.
Answer:
V2O5

2. H2S gas is __________ than air.
Answer:
heavier

3. An aqueous solution of H2S litmus red.
Answer:
blue

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

4. In ostwald’s process, for the preparation of nitric acid _______ is used as catalyst.
Answer:
platinum

5. Red hot magnesium reacts with nitrogen to form
Answer:
Mg3N2

6. Ammonia gas prepared in the laboratory is dried by__________
Answer:
CaO

7. Ammonia has a strong …………..smell.
Answer:
pungent

8. In the laboratory, H2S is prepared by the action of dilute H2SO4 acid on________
Answer:
FeS

9. Calcium Cyanamide is prepared by reaction between cac2 and______at elevated temperature.
Answer:
N2

10. Urea is prepared by reaction between NO3 and________ at elevated temperature and high pressure.
Answer:
CO2

State whether the following statement is True or False :

1. Nitrogen is slightly heavier than air.
Answer:
False

2. HCl is produced as a by-product during the manufacture of sodium sulphate by ostwald’s process.
Answer:
False

3. H2S is a poisonous gas.
Answer:
True

4. In presence of air, H2S burns with blue flame.
Answer:
True

5. Ammonia is used for production of fertilizers like urea.
Answer:
True

6. Ammonia is prepared by heating a dry ammonium salt with a dry alkali.
Answer:
True

WBBSE Class 10 Physical Science MCQ Questions Chapter 8.4 Inorganic Chemistry in the Laboratory and in Industry

7. P2O5 is acidic so it reacts with ammonia.
Answer:
True

8. Ammonia is highly soluble in water.
Answer:
True

9. H2S is a strong oxidizing agent.
Answer:
False

10. In presence of air, H2S burns with blue flame.
Answer:
True

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