Question

2. A gas evolved on reaction of aluminum with boiling concentrated caustic alkall solution
3. An oxide which forms salts when it reacts with both acids and alkalis.
4. A metal present in period 3 and group 1 of the periodic table.​

Answer 1

Explanation:

Caustic soda is the common name for sodium hydroxide. ... When aluminium is reacted with concentrated caustic soda, it forms a salt and releases gas

Answer 2

Answer:

2. The gas released is hydrogen gas. Explanation: Caustic soda is the common name for sodium hydroxide. ... When aluminium is reacted with concentrated caustic soda, it forms a salt and releases gas.

3.  An oxide which forms salts when it reacts with both acids and alkali is knwn as amphoteric oxides.

4. sodium

The element which is present in period 3 and group 1 is sodium [Na]