Reaction of Acids with Metal Oxides

Q.

Name the raw materials used in the manufacture of bleaching powder. Mention two major uses of bleaching powder.

Q.

Washing soda loses its water of crystallization when exposed to air due to the phenomenon called _________.

Q.

How can anhydrous salts regain their colour?

Q.

Manganese$\left(IV\right)$oxide, lead$\left(IV\right)$oxide, and red lead$\left({\mathrm{Pb}}_3{\mathrm{O}}_4\right)$ react with concentrated hydrochloric acid liberating chlorine.
Write the equation for the reaction of concentrated hydrochloric acid with $\left({\mathrm{Pb}}_3{\mathrm{O}}_4\right)$

Q.

Explain giving reasons;

What happens when the crystals of washing soda are exposed to air?

Q. A strip of magnesium is burnt in air and the product obtained is allowed to react with sulphuric acid. Which of the following ions are present in the final salt obtained?

1. ${\text{Mg}}^{2+}$ and ${\text{SO}}_4^{2-}$
2. ${\text{Mg}}^{+}$ and ${\text{SO}}_4^{2-}$
3. ${\text{H}}^{+}$ and ${\text{SO}}_3^{2-}$
4. ${\text{Mg}}^{2+}$ and ${\text{SO}}_3^{2-}$

Q.

Define the term.

Oxides

Q. Copper oxide is a/an while potassium hydroxide is a/an .

1. base
2. alkali
3. acid
4. salt

Q.

Analyze the reaction given below and identify the salt formed.
$\text{FeO (aq) + HCl (aq)}\to {\text{Salt + H}}_2\text{O (l)}$

1. $\text{FeO}$
2. ${\text{Fe}}_2{\text{O}}_3$
3. ${\text{FeCl}}_2$
4. ${\text{FeSO}}_4$

Q. Complete the given reactions:
$+Water\to Acid$
$+Water\to Base$

1. Neutral oxide
2. Non-metallic oxide
3. Metallic oxide
4. Salt

Q. Choose the products that are formed when magnesium oxide reacts with hydrochloric acid.

1. Magnesium hydroxide and oxygen
2. Magnesium chloride and carbon dioxide
3. Magnesium chloride and water
4. Magnesium hydroxide and water

Q.

Acid reacts with metal oxide to form _______.

1. salt and hydrogen
2. base and water
3. metal and salt
4. salt and water

Q. Identify X in the following reaction.
X+ Acid $\to$ Salt + Water

1. Metal oxide
2. Metals
3. Metal carbonates
4. Metal hydrogen carbonates

Q. Acids react with to give salt and water.

1. metal carbonates
2. non-metal oxides
3. metal oxides