Neutralization

Q.

What is the role of acid in our stomach?

Q. Identify X in the following reaction:

${\text{Ca(OH)}}_2\text{(aq)}+2\text{X}$ $\to$ ${\text{CaCl}}_2\text{(aq)}+2{\text{H}}_2\text{O}\text{(l)}$

1. ${\text{H}}_2{\text{SO}}_4$
2. ${\text{HNO}}_3$
3. $\text{HCl}$
4. ${\text{H}}_2{\text{CO}}_3$

Q.

On diluting an acid, it is advised to add acid to water and not water to acid. Explain why it is so advised?

Q.

Write down the chemical equation representing the formation of salt from an acid and a base.

Q.

In the process of neutralization, an acid and a base react to form salt and water respectively.

1. True
2. False

Q.

In an experiment, sodium hydroxide solution reacts with hydrochloric acid solution to produce sodium chloride solution and water. Which of the following correctly represents the balanced equation (with physical states) for this experiment?

1. NaOH (aq) + HCl (l) → NaCl (aq) + (l)

2. NaOH (aq) + HCl (aq) → NaCl (aq) + (l)

3. NaOH (aq) + HCl (l) → NaCl (aq) + (aq)

4. NaOH (aq) + HCl (aq) → NaCl (aq) + (aq)

Q.

The salt that gives a neutral solution when dissolved in water is:

1. ${\mathrm{Na}}_2{\mathrm{SO}}_4$

2. ${\mathrm{NH}}_4\mathrm{Cl}$

3. ${\mathrm{CH}}_3\mathrm{COONa}$

4. ${\mathrm{Na}}_2{\mathrm{CO}}_3$

Q. What is the role of hydrochloric acid in our stomach?

Q. Potassium hydroxide reacts with acid to form potassium salt and ___.

Q. Slaked lime is obtained when water is added to

1. 
2. 
3. 
4. 

Q.

Which of the following acid is not used in preparation of hydrogen gas?

1. Dilute hydrochloric acid

2. Dilute nitric acid

3. Dilute sulfuric acid

Q.

Explain why?

White thick fumes are formed when a glass rod dipped in ${\text{NH}}_{\text{4}}\text{OH}$ is brought near the mouth of a bottle full of $\text{HCl}$ gas.

Q.

Besides salt, what is the other product of a neutralization reaction?

Q. The absolute enthalpy of neutralisation of the reaction will be:

1. $+57.33kJmo{l}^{-1}$
2. $-57.33kJmo{l}^{-1}$
3. greater than $-57.33kJmo{l}^{-1}$
4. less than $-57.33kJmo{l}^{-1}$

Q. Sodium hydroxide + Hydrochloric acid $\to$

1. Sodium chloride + Water
2. Water + Heat
3. Sodium chloride + Water + Heat
4. Sodium + Heat

Q.

Statements given below are incorrect. Write the correct statements :

A lot of heat is needed to start the reaction between sodium hydroxide and hydrochloric acid.

Q.

What happens to the temperature of the surroundings when an acid reacts with a base?

1. can’t be said

2. decreases

3. increases

4. does not changes

Q. What are the products of neutralisation reactions?

1. Salt and water
2. Acid or base and salt
3. Acid and base
4. Acid/base and water

Q. Methyl orange does not change the colour of ___________ solutions.

1. acidic
2. alkaline
3. neutral
4. basic

Q.

Write the chemical equation which represents that the effect of base neutralized by the acid is vice versa.

Q.

Define neutralization reaction?

Q. Mg(s)+HCl(aq)---->
K(s)+H2SO4(aq)---->
Ah(s)+H3PO4(aq)---->

Q. $HCl+NaOH\to NaCl+H_{2}O$ is an example of :

1. addition reaction
2. substitution reaction
3. elemination reaction
4. neutralisation reaction

Q.

Neutralization reaction is an example of -

1. Exothermic reaction

2. Endothermic reaction

3. Oxidation reaction

4. None of these

Q. Process in which acids ($H^{+}$) and bases ($O{H}^{-}$) react to form salts and water is called :

1. neutralization
2. hydrogenation
3. halogenation
4. sublimation

Q.

Name the acid which should not be used for the preparation of hydrogen.

Q.

Which of the following is a neutralisation reaction?

1. $\mathrm{NaOH}\left(\mathrm{l}\right)+\mathrm{HCl}\left(\mathrm{l}\right)\to \mathrm{NaCl}\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

2. ${\mathrm{Na}}_2\mathrm{O}\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to 2\mathrm{NaOH}\left(\mathrm{l}\right)$

3. $2\mathrm{Mg}\left(\mathrm{s}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2\mathrm{MgO}\left(\mathrm{s}\right)$

4. ${\mathrm{SO}}_3\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to {\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{l}\right)$

Q. Which of the following will turn blue litmus to red?

1. Copper oxide
2. Sulphur dioxide
3. Magnesium oxide
4. Sodium oxide

Q. What is the meaning of neutralization reaction with an example.

Q.

Identify the following equation

$\mathrm{NaOH}+\mathrm{HCl}\to \mathrm{NaCl}+{\mathrm{H}}_2\mathrm{O}$