Reaction with Bases

Q.

Soda water contains _____

Q.

Who prepared urea for the first time by heating ammonium cynate?

1. Wohler

2. Lavosier

3. Fuller

4. Van Holde

Q.

What happens when sodium hydroxide is heated with ammonium salts?

1. Ammonia gas is evolved

2. Hydrogen gas is evolved

3. Carbon dioxide gas is evolved

4. Oxygen gas is evolved

Q.

What are the products formed when a carboxylic acid reacts with alkali ?

1. Alcohol and water
2. Salt and water
3. Salt and ether
4. Aldehyde and water

Q.

Which of the following ammonium salt is not used on heating with alkalis to give ammonia?

1. Ammonium chloride

2. Ammonium sulphate

3. Ammonium nitrate

4. Ammonium carbonate

Q.

9b. State your observation for the following cases :

(v) Glass rod dipped in ammonium hydroxide is brought near the mouth of the concentrated hydrochloric acid bottle.

Q.

Moist hydrogen gas combines with chlorine to form____.

1. Cl₂ gas

2. HCl gas

3. O₂ gas

4. H₂ gas

Q.

Which of the following gas is released when ammonium nitrite is heated?

1. N₂O

2. N₂

3. NO₂

4. NO

Q. Burst the bubbles that contain the correct physical property of sulphuric acid.

1. Boils at $337°C$
2. Bitter in taste
3. Colourless
4. Odourless
5. Pungent odour
6. Corrosive
7. Denser than $H_{2}O$
8. Soluble in $H_{2}O$

Q.

When a glass rod dipped in ammonia solution is brought near vapours of hydrochloric acid we see the formation of a dense white fume. What is this dense white fume?

1. Water vapour

2. Ammonium Nitrate

3. Ammonium Chloride

4. Nitrosyl Chloride

Q. Chlorine reacts with hot, concentrated sodium hydroxide to form :

1. Sodium chlorate
2. Sodium sulphate
3. Hydrogen
4. Nitrogen trichloride

Q.

How do we taste acidic nature of acetic acid $\left(C{H}_{3}COOH\right)$?

1. Reaction with sodium hydroxide (NaOH)

2. Litmus paper test

3. Reaction with alcohol

4. Reaction with sodium

Q.

Which of the following componds are not formed during electrolysis?

1. KOH

2. NaOH

3. NaCl

4. HCl

Q. What happens when acetic acid reacts with sodium carbonate? [2 marks]

Q. When kept in the open air, the crystals of washing soda lose nine molecules of water to form a monohydrate.

1. efflorescence
2. deliquescence
3. dehydration
4. hydration

Q. Correct: ammonium salts on heating decompose to give ammonia

Q.

WHAT IS THE NAME OF THE CHEMICAL USED IN BLACK AND WHITE PHOTOGRAPHY?

Q.

When a glass rod dipped in ammonia solution is brought near vapours of hydrochloric acid we see the formation of a dense white fume. What is this dense white fume?

1. Water vapour

2. Ammonium Nitrate

3. Ammonium Chloride

4. Nitrosyl Chloride

Q.

Hydrogen chloride gas on mixing with ammonia produces dense white fumes due to the formation of:

1. Ammonium hydroxide

2. Nitrogen

3. Ammonium chloride

4. Sulphur dioxide

Q.

How do we taste acidic nature of acetic acid $\left(C{H}_{3}COOH\right)$?

1. Reaction with sodium hydroxide (NaOH)

2. Litmus paper test

3. Reaction with alcohol

4. Reaction with sodium

Q. What happens when acetic acid react with sodium hydoxide