Question
Explain why the ozone layer is called ‘natural sunscreen’.
Explain why the ozone layer is called ‘natural sunscreen’.
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Subject: Physical Science
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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…
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…
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]
Question
State the resistance of a 220 V – 100 W bulb.
State the resistance of a 220 V – 100 W bulb.
Question
What is now used in electrical circuits instead of fuse wire?
What is now used in electrical circuits instead of fuse wire?
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?
Question
What type of lens is used as a magnifying glass?
What type of lens is used as a magnifying glass?
Question
Write whether the following statement is True or False: Which physical quantity has the unit W m⁻¹ K⁻¹?
Write whether the following statement is True or False: Which physical quantity has the unit W m⁻¹ K⁻¹?
Question
If coefficient of linear expansion of iron is 1.2 × 10⁻⁵ /°C, then coefficient of cubical expansion of iron is 3.6 × 10⁻⁵ /°C
Write whether the following statement is True or False: If coefficient of linear expansion of iron is 1.2 × 10⁻⁵ /°C, then…