Properties & Uses of Copper

Q.

The products of the reaction between zinc and dilute Sulphuric acid are:

1. Zinc sulphate and Oxygen gas

2. Zinc sulphate and Hydrogen gas

3. Zinc sulphate, water and Hydrogen gas

4. Zinc sulphide and Hydrogen gas

Q. Which of the following is a good conductor of electricity?

1. Copper
2. Carbon
3. Phosphorus
4. Hydrogen

Q. ${\text{H}}_2$ gas is evolved when iron is added to dil. ${\text{H}}_2{\text{SO}}_4$ and not when copper is added to dil. ${\text{H}}_2{\text{SO}}_4$.

1. True
2. False

Q. Which of the following pair of metals does not react with oxygen even if they are heated at high temperatures?

1. Copper$\left(\text{Cu}\right)$ and sodium$\left(\text{Na}\right)$
2. Magnesium$\left(\text{Mg}\right)$ and calcium$\left(\text{Ca}\right)$
3. Zinc$\left(\text{Zn}\right)$ and copper$\left(\text{Cu}\right)$
4. Silver$\left(\text{Ag}\right)$ and gold$\left(\text{Au}\right)$