Question

In NCERT class 10 Activity 1.7, there are two questions :
Q1. what happens in each case?
Q2. Which gas is present in each test tube?
Pls ans these two question.

Answer 1

Answer:

2)Oxygen gas is formed in the tube connected to the positive electrode. Hydrogen gas is produced in the tube connected to the negative electrode. The process produces twice as much hydrogen gas as oxygen gas. The hydrogen is collected in an upside-down test tube and put over a candle flame.

Answer 2

Answer:

Gas collected at the cathode (-) is twice that of gas collected at the anode (+).

2. When we bring the flame to the gas collected at the cathode, it burns immediately. While gas obtained at anode does not burn.

Inference: Electricity decomposes water into its component. Hydrogen atoms in water receive an electron from cathode electrode and form hydrogen gas. Similarly, oxygen atoms in water lose electron at the anode and form oxygen gas.