A uniform half metre rule balances horizontally on a knife edge at 29 cm mark when a weight of 20 gf is suspended from one end.

1. Draw a diagram of the arrangement.
2. What is the weight of the half
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What are acoustically measurable quantities related to pitch and loudness?

List any four writs that the High Court can issue for the enforcement of Fundamental Rights.

Give a geographical reason: Ratoon cropping is gaining popularity among sugarcane cultivators

Give a reason: India's location is advantageous for the generation of solar power

The aim of the Fountain Experiment is to prove that:

1. HCl turns blue litmus red
2. HCl is denser than air
3. HCl is highly soluble in water
4. HCl fumes in moist air.

State the dependence of angle of deviation:

1. On the refractive index of the material of the prism.
2. On the wavelength of light.

With reference to rice cultivation, Why does the cultivation of rice require a lot of manual labour?

Blood vessels carrying blood to the left atrium.

The Executive Power of the Indian Union is vested in the President. In this context, answer the following:

1. How is the President of India elected? State the composition of the Electoral College that
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Blood flows in arteries in spurts and is under pressure.

Give scientific reason.

Baeyer's process is used to concentrate bauxite ore to alumina.

Give balanced chemical equations for the reaction taking place for its conversion from bauxite to alumina.

With reference to George Orwell’s ‘The Animal Farm’, answer the following questions:

(i) What decisions were made regarding the retiring age of the animals at the beginning when the laws of Animal...

1. What is the principle of method of mixtures?
2. What is the other name given to it?
3. Name the law on which the principle is based?

State one relevant reason: Hydrated copper sulphate crystals turn white on heating.

The 4^th term of an A.P. is 22 and 15^th term is 66. Find the first term and the common difference. Hence find the sum of the series to 8 terms.