1. Draw a diagram to show a block and tackle pulley system having a velocity ratio of 3 marking the direction of load (L), effort (E) and tension (T).
2. The pulley system drawn lifts a load of 150 N when an
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Give a reason: Copper is used to make electric wires

State one disadvantage of using coal as a source of power

"The modern means of irrigation are gaining popularity." Give two reasons to justify this statement.

In the given figure TP and TQ are two tangents to the circle with centre O, touching at A and C respectively. If ∠BCQ = 55^o and ∠BAP = 60^o, find:

The power of a lens is -5D.

1. Find its focal length.
2. Name the type of lens.

State any four causes that led to the Second World War.

State your observations when

Dilute Hydrochloric acid is added to Copper carbonate.

How are the Rajya Sabha members elected?

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 is the maximum gap allowed between the two parliamentary sessions?

State one observation: Lead nitrate is heated strongly in a test tube.

Read the extract given below and answer the questions that follow:

"Now tell us what it was all about".
Young Peterkin, he cries.
And little Wilhelmine looks up
With wonder - waiting eyes,
"Now tell us...

"The Iron and Steel industry constitutes the backbone of modern industrial economy." Give two reasons to justify the statement.

Laboratory preparation of ammonia from ammonium chloride.

Give one word or a phrase: The reaction in which carboxylic acid reacts with alcohol in the presence of conc. H₂SO₄ to form a substance having a fruity smell.