Inorganic Chemistry Test

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Inorganic Chemistry Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

Which among the following pairs of gases is produced due to bacterial decomposition of urea?

A
NH₃ and CO₂

B
CO₂ and H₂

C
NH₃ and CO

D
NH₃ and H₂

Solution

Due to bacterial decomposition of urea, ammonia and carbon dioxide gases are produced.
Question 2
1 / -0

Match the following compounds with their uses and choose the correct option given below:

(1) Potassium nitrate (1) Fertilizer

(2) Calcium nitrate (2) Photography

(3) Silver nitrate (3) Gun powder

(4) Tri-nitro glycerine (4) Explosive

A
A - 3, B - 1, C - 2, D - 4

B
A - 4, B - 1, C - 2, D - 3

C
A - 2, B - 3, C - 4, D - 2

D
A - 1, B - 2, C - 3, D - 4

Solution

(1) Potassium nitrate (1) Gun powder

(2) Calcium nitrate (2) Fertiliser

(3) Silver nitrate (3) Photography

(4) Tri-nitro glycerine (4) Explosive
Question 3
1 / -0

Which of the following nitrates does not liberate oxygen gas on heating?

A
Sodium nitrate

B
Ammonium nitrate

C
Lead nitrate

D
Silver nitrate

Solution

Ammonium nitrate liberates nitrous oxide and water on heating. Oxygen is not liberated.
Question 4
1 / -0

Which of the following is/are observed when a glass rod dipped in ammonium hydroxide is brought near the mouth of a jar containing HCl gas?

A
Dense white fumes

B
Reddish-brown fumes

C
Pungent smell

D
Crust formation on the rod

Solution

Dense white fumes are formed around the glass rod. It is because the ammonia vapours on coming in contact with HCl gas form solid ammonium chloride particles which get suspended in the gas and appear like dense white fumes.

NH₄OH(aq) + HCl(aq) NH₄Cl(aq) + H₂O(l)
Question 5
1 / -0

What are the melting and boiling points of liquid HCl?

A
Boiling point: – 85°C and melting point: -114°C

B
Boiling point: 93°C and melting point: 86° C

C
Boiling point: 82° C and melting point: – 30°C

D
Boiling point 113°C and melting point – 90°C

Solution

The melting and boiling points of liquid HCl are 85°C and -114°C, respectively.
Question 6
1 / -0

Which of the following is not a use of HCl?

A
Manufacture of photographic chemicals and drugs

B
Extraction of glue from bones

C
Manufacture of sodium sulphite

D
In tanning and calico industry

Solution

HCl is not used for manufacturing sodium sulphite.
Question 7
1 / -0

For extinguishing fire, we use

A
carbon monoxide

B
hydrogen

C
carbon dioxide

D
marsh gas

Solution

For extinguishing fire, we use carbon dioxide.
Question 8
1 / -0

Which acid is used to prepare carbon monoxide from oxalic acid?

A
Sulphuric acid

B
Formic acid

C
Nitric acid

D
Carbonic acid

Solution

Sulphuric acid is used to prepare carbon monoxide from oxalic acid.

H₂C₂O₄ + H₂SO₄ → H₂O + CO + CO₂
Question 9
1 / -0

Which of the following is not a method of preparation of carbon monoxide?

A
By dehydration of oxalic acid

B
By dehydration of formic acid

C
Reduction of carbon dioxide by coke

D
By thermal decomposition of lime stone

Solution

Thermal decomposition of limestone is not used to prepare carbon monoxide because when limestone (calcium carbonate) is strongly heated, until it undergoes thermal decomposition, it forms calcium oxide and carbon dioxide, not carbon monoxide.

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Re-Attempt Weekly Quiz Competition

(1) Potassium nitrate	(1) Fertilizer
(2) Calcium nitrate	(2) Photography
(3) Silver nitrate	(3) Gun powder
(4) Tri-nitro glycerine	(4) Explosive

(1) Potassium nitrate	(1) Gun powder
(2) Calcium nitrate	(2) Fertiliser
(3) Silver nitrate	(3) Photography
(4) Tri-nitro glycerine	(4) Explosive

Inorganic Chemistry Test - 5

Result

Inorganic Chemistry Test - 5

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Question 1

NH3 and CO2

CO2 and H2

NH3 and CO

NH3 and H2

Solution

Question 2

A - 3, B - 1, C - 2, D - 4

A - 4, B - 1, C - 2, D - 3

A - 2, B - 3, C - 4, D - 2

A - 1, B - 2, C - 3, D - 4

Solution

Question 3

Sodium nitrate

Ammonium nitrate

Lead nitrate

Silver nitrate

Solution

Question 4

Dense white fumes

Reddish-brown fumes

Pungent smell

Crust formation on the rod

Solution

Question 5

Boiling point: – 85°C and melting point: -114°C

Boiling point: 93°C and melting point: 86° C

Boiling point: 82° C and melting point: – 30°C

Boiling point 113°C and melting point – 90°C

Solution

Question 6

Manufacture of photographic chemicals and drugs

Extraction of glue from bones

Manufacture of sodium sulphite

In tanning and calico industry

Solution

Question 7

carbon monoxide

hydrogen

carbon dioxide

marsh gas

Solution

Question 8

Sulphuric acid

Formic acid

Nitric acid

Carbonic acid

Solution

Question 9

By dehydration of oxalic acid

By dehydration of formic acid

Reduction of carbon dioxide by coke

By thermal decomposition of lime stone

Solution

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NH₃ and CO₂

CO₂ and H₂

NH₃ and CO

NH₃ and H₂