Metals and Nonmetals with Steam

Q.

Zinc reacts with concentrated sulphuric acid to form zinc hydride and sulphide gas.

1. True
2. False

Q.

Which of the following reacts with cold water vigorously?

1. Sodium (Na)

2. Calcium (Ca)

3. Aluminium (Al)

4. Zinc (Zn)

Q. <!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> Why can’t copper, gold and silver displace hydrogen from water or acids? [2 Mark]

Q.

Why is Sodium stored in kerosene?

Q.

Which of the following statements is true if red hot iron is reacted with steam?

1. It forms triferric tetraoxide

2. It's a reversible reaction if hydrogen isn't separated

3. Hydrogen gas is released

4. Iron oxide formed reacts with hydrogen and reduces back to iron.