Inorganic Chemistry Test

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Inorganic Chemistry Test - 8

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following gases is/are evolved when ammonia reacts with copper oxide?

A
Hydrogen

B
Nitrogen

C
Oxygen

D
Both (2) and (3)

Solution

When ammonia gas is passed over heated copper oxide in a hard glass tube, nitrogen is evolved.
2NH₃+ 3CuO 3Cu + 3H₂O + N₂
Question 2
1 / -0

Which of the following is used as a drying agent during purification of ammonia gas?

A
Conc. H₂SO₄

B
P₂O₅

C
CaCl₂

D
CaO

Solution

Calcium oxide is suitable for drying gaseous amines and ammonia.
Question 3
1 / -0

What is the optimum temperature to be maintained in Haber's process?

A
200 – 900°C

B
450 – 500°C

C
500 – 1000°C

D
90 – 300°C

Solution

The optimum temperature to be maintained in Haber's process is 450 – 500°C.
Question 4
1 / -0

Why is conc. HCl not used in preparation of HNO₃?

A
HCl is highly reactive

B
HCl is volatile

C
HCl does not react with nitre/chile saltpetre

D
HCl adds impurities in the solution

Solution

Concentrated HCl is not used in the preparation of HNO₃ because HCl is volatile.
Question 5
1 / -0

Why does HNO₃ stain the skin yellow?

A
Due to formation of xanthoproteic acid

B
Due to oxidation of protein matter

C
Due to deposition of nitrogen dioxide on the skin

D
Due to formation of nascent oxygen

Solution

HNO₃ stains the skin yellow due to the formation of xanthoproteic acid.
Question 6
1 / -0

Which of the following can be used as a drying agent during purification of HCl gas?

A
Conc. HNO₃

B
P₂O₅

C
CaO

D
Conc. H₂SO₄

Solution

Conc. H₂SO₄ can be used as a drying agent during purification of HCl gas. It removes any water vapour which is present in the gas.
P₂O₅, concentrated HNO₃ and CaO cannot be used as dehydrating agents because they react with HCl.
Question 7
1 / -0

Which of the following is used to detect the presence of HCl in a given sample?

A
AgNO₃

B
AgCl₂

C
PbCl₂

D
HNO₃

Solution

AgNO₃ is used to detect the presence of HCl in a given sample.
Question 8
1 / -0

Which of the following solutions is used to detect the presence of carbon monoxide in the sample of blood?

A
PtCl₂

B
MgCl₂

C
Ca (OH)₂

D
PdCl₂

Solution

PdCl₂ solution is used to detect the presence of carbon monoxide in the sample of blood.
Question 9
1 / -0

Which of the following is not a use of carbon monoxide?

A
Used as a fuel

B
Used in the manufacture of sodium formate

C
Used in the manufacture of methanol

D
Used for extinguishing fires

Solution

Carbon monoxide is not used for extinguishing fires because it is a poisonous gas.
Question 10
1 / -0

Which of the following metal carbonates does not produce carbon dioxide on thermal decomposition?

A
Copper carbonate

B
Sodium carbonate

C
Calcium carbonate

D
Lead carbonate

Solution

Carbonates of alkali metals have high thermal stability.
Sodium carbonate is a very stable carbonate, resisting decomposition up to a very high temperature, often till its melting temperature.
Over and above that temperature, however, it decomposes slowly to produce the metal oxide and carbon dioxide.
Question 11
1 / -0

Which of the following gases is produced when marble chips are reacted with dil. HCl?

A
Chlorine

B
Carbon dioxide

C
Carbon monoxide

D
Hydrogen

Solution

When marble chips are reacted with dil. HCl, carbon dioxide gas is produced.
Question 12
1 / -0

Which of the following is not a property of liquid ammonia?

A
Non conductor of electricity

B
Consists of molecules

C
Volatile

D
Weak refrigerant

Solution

Liquid ammonia has vaporisation properties, it is a useful refrigerant. It was commonly used prior to the popularisation of chlorofluorocarbons (freons). Anhydrous ammonia is widely used in industrial refrigeration applications because of its high energy efficiency and low cost. Due to this reason, option (4) is incorrect.
Question 13
1 / -0

Which of the following is used as a catalyst in Haber's process?

A
Finely divided iron

B
Traces of molybdenum

C
Traces of sulphur compounds

D
Carbon dioxide

Solution

The finely divided iron is used as a catalyst in Haber's process.
Question 14
1 / -0

Which of the following processes is used to prepare nitric acid?

A
Ostwald's process

B
Bosch process

C
Harber's process

D
Sotvay's process

Solution

Ostwald's process is used to prepare nitric acid.
Question 15
1 / -0

Why is nitric acid prepared in the laboratory slightly yellow?

A
Due to dissolution of NO₂ gas.

B
Due to dissolution of N₂ gas.

C
Due to dissolution of O₂ gas.

D
Due to the action of impurities.

Solution

Due to dissolution of NO₂ gas, nitric acid prepared in the laboratory is slightly yellow.
Question 16
1 / -0

Which of the following does not burst into flames when hot conc. nitric acid is poured into it?

A
Saw dust

B
Turpentine

C
Potassium iodide

D
Alcohol

Solution

Potassium iodide does not burst into flames when hot conc. nitric acid is poured into it.
Question 17
1 / -0

Nitric acid is used to purify which of the following metals?

A
Cu

B
Ag

C
Au

D
Pb

Solution

Nitric acid is used to purify gold.
Question 18
1 / -0

Heating potassium chlorate in presence of manganese dioxide as a catalyst is a method to prepare

A
oxygen

B
carbon dioxide

C
nitrogen

D
hydrogen

Solution

The most frequently used method to prepare oxygen in the laboratory is through the decomposition of potassium chlorate (KClO₃). Potassium chlorate is heated and oxygen is evolved leaving KCl.

Manganese dioxide (MnO₂) is added to the reaction as a catalyst.
Question 19
1 / -0

Prismatic sulphur is formed by

A
bubbling air through molten sulphur

B
allowing molten sulphur to crystallise slowly in contact with hot molten sulphur

C
passing an electric arc through sulphur vapour

D
cooling molten sulphur quickly with water

Solution

Monoclinic sulphur exists as long needle–like prisms. Hence, it is also called prismatic sulphur. It is prepared by allowing molten sulphur to crystallize slowly in contact with hot molten sulphur.

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Inorganic Chemistry Test - 8

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Inorganic Chemistry Test - 8

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Question 1

Hydrogen

Nitrogen

Oxygen

Both (2) and (3)

Solution

Question 2

Conc. H2SO4

P2O5

CaCl2

CaO

Solution

Question 3

200 – 900°C

450 – 500°C

500 – 1000°C

90 – 300°C

Solution

Question 4

HCl is highly reactive

HCl is volatile

HCl does not react with nitre/chile saltpetre

HCl adds impurities in the solution

Solution

Question 5

Due to formation of xanthoproteic acid

Due to oxidation of protein matter

Due to deposition of nitrogen dioxide on the skin

Due to formation of nascent oxygen

Solution

Question 6

Conc. HNO3

P2O5

CaO

Conc. H2SO4

Solution

Question 7

AgNO3

AgCl2

PbCl2

HNO3

Solution

Question 8

PtCl2

MgCl2

Ca (OH)2

PdCl2

Solution

Question 9

Used as a fuel

Used in the manufacture of sodium formate

Used in the manufacture of methanol

Used for extinguishing fires

Solution

Question 10

Copper carbonate

Sodium carbonate

Calcium carbonate

Lead carbonate

Solution

Question 11

Chlorine

Carbon dioxide

Carbon monoxide

Hydrogen

Solution

Question 12

Non conductor of electricity

Consists of molecules

Volatile

Weak refrigerant

Solution

Conc. H₂SO₄

P₂O₅

CaCl₂

Conc. HNO₃

P₂O₅

Conc. H₂SO₄

AgNO₃

AgCl₂

PbCl₂

HNO₃

PtCl₂

MgCl₂

Ca (OH)₂

PdCl₂

Due to dissolution of NO₂ gas.

Due to dissolution of N₂ gas.

Due to dissolution of O₂ gas.