Class: Class 10

Question

The volume of a certain amount of gas at a temperature of 27°C and at pressure 76 cm of Hg is 200 c.c. Find the volume of the gas when pressure of the gas changes to 38 cm of Hg and temperature changes to 127°C.

The volume of a certain amount of gas at a temperature of 27°C and at pressure 76 cm of Hg is 200…

04/08/2026

Question

How are global warming and greenhouse effect related?

How are global warming and greenhouse effect related?

04/08/2026

Question

Explain why the ozone layer is called ‘natural sunscreen’.

Explain why the ozone layer is called ‘natural sunscreen’.

04/08/2026

Question

What will be the volume of 8 g of H₂ gas (H = 1) at a pressure of 4 atmospheres and a temperature of 27°C?

What will be the volume of 8 g of H₂ gas (H = 1) at a pressure of 4 atmospheres and a…

04/08/2026

Question

A certain amount of gas occupies 750 cc at –3°C. The gas is heated at constant pressure till its volume becomes 1 litre. What is its final temperature? [2]

A certain amount of gas occupies 750 cc at –3°C. The gas is heated at constant pressure till its volume becomes 1…

04/08/2026

Question

Write down the formula of Fire ice. How is methane gas obtained from it? [1+1]

Write down the formula of Fire ice. How is methane gas obtained from it? [1+1]

04/08/2026

Question

State the resistance of a 220 V – 100 W bulb.

State the resistance of a 220 V – 100 W bulb.

04/08/2026

Question

What is now used in electrical circuits instead of fuse wire?

What is now used in electrical circuits instead of fuse wire?

04/08/2026

Question

For which value of the angle of incidence in refraction of light is Snell’s law not applicable?

For which value of the angle of incidence in refraction of light is Snell’s law not applicable?

04/08/2026

Question

What type of lens is used as a magnifying glass?

What type of lens is used as a magnifying glass?

04/08/2026