Alkali

Q.

What do you understand by an alkali? Give two examples of weak alkalis.

Q.

11. Which of the following acid is present in lemons?

1. Acetic acid

2. Oleic acid

3. Stearic acid

4. Ascorbic acid

Q.

Which amongst the following substance is an alkali?

1. Calcium hydroxide

2. Copper hydroxide

3. Sodium hydroxide

4. Aluminium hydroxide

Q. In the presence of a soap solution, the china rose indicator will turn in colour.

1. blue
2. green
3. red

Q.

Complete the following reaction:

${\text{H}}_2{\text{SO}}_4+2\text{NaOH}\to$

1. ${\text{Na}}_2{\text{SO}}_4+2{\text{H}}_2\text{O}$

2. $2{\text{Na}}_2{\text{SO}}_4+{\text{H}}_2\text{O}$

3. $2{\text{Na}}_2{\text{SO}}_4+{\text{H}}_2\text{O}$

4. $2{\text{Na}}_2{\text{SO}}_4+4{\text{H}}_2\text{O}$

Q. can be used to nullify the effect of hydrochloric acid.

1. Sodium hydroxide
2. Ammonium chloride
3. Sodium chloride

Q. The reaction between an acid and a base to form a salt and water is a reaction.

1. neutralisation
2. decomposition
3. combination
4. addition