The diagram below shows a magnetic needle kept just below the conductor AB which is kept in North South direction.

1. In which direction will the needle deflect when the key is closed?
2. Why is the
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Give a reason: A well-developed transport network is important for industrial growth.

Find the value of k for which the following equation has equal roots.

$x^2 + 4kx + (k^2 - k + 2) = 0$

Action of dilute hydrochloric acid on magnesium sulphite

The canal through which the testes descend into the scrotum just before the birth of a male baby.

Give the Biological / technical term.

In Period 3, the most metallic element is ____ . (sodium / magnesium / aluminium)

Give two reasons to explain as to why the Tropical Evergreen Forests are difficult to exploit for commercial purpose.

1. A fuse is rated 8A. Can it be used with an electrical appliance rated 5 KW, 200 V? Give a reason.
2. Name two safety devices which are connected to the live wire of a household electric circuit.

What was meant by the term ‘Imperialism’, as a cause for World War I?

Mention any two economic factors responsible for the growth of nationalism in India.

If the power of a motor be 100 kW, at what speed can it raise a load of 50,000 N?

Name the following: A metallic mineral for which the Balaghat district of Madhya Pradesh is famous.

With reference to the terms Mechanical Advantage, Velocity Ratio and efficiency of a machine, name and define the term that will not change for a machine of a given design.

Which class of lever will always have MA > 1 and why?

State the meaning of the term Question Hour.

Choose the method of preparation of the following salts, from the methods given in the list:

[List: A. Neutralization B. Precipitation C. Direct combination D. Substitution]

1. Lead chloride
2. Iron (II)
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