Laboratory preparation of Nitric acid

Explain why the forest cover in India is shrinking?

The following diagram shows a 60°, 30°, 90° glass prism of critical angle 42°. Copy the diagram and complete the path of incident ray AB emerging out of the prism marking the angle of incidence on...

Hypotonic solution and Hypertonic solution [condition of a plant cell when placed in them]

Differentiate between the following pairs on the basis of what is indicated in the brackets.

Mention one advantage of generating power from bio-gas.

Mention two factors that favour the development of tube well irrigation in Punjab.

By drawing an electron dot diagram show the formation of Ammonium Ion [Atomic No.: N = 7 and H = 1]

The distance between two bodies is doubled. How is the magnitude of gravitational force between them affected?

With reference to Littoral forest, Why do the trees in this forest grow aerial roots?

The diagram above shows three resistors connected across a cell of e.m.f. 1.8 V and internal resistance r. Calculate:

1. Current through 3 W resistor.
2. The internal resistance r.

State one other qualification required to become a Judge of the High Court, apart from Indian citizenship.

With reference to the Mass Phase of the National Movement under the leadership of Gandhi, answer the following:

1. Briefly explain the Dandi March of 1930.
2. State any three reasons for the launching of the
...

Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong:

Example: Nose, Tongue, Arm, Eye
Answer: Odd Term – Arm, Category – Sense organs

1. Detergents,
...

(i) Identify the class of the lever shown in the diagram below:

(ii) How is it possible to increase the M.A. of the above lever without increasing its length?

The wax-like layer on the epidermis of leaves which reduces transpiration.

In the figure given below, O is the centre of the circle and AB is a diameter.

If AC = BD and ∠AOC = 72^o. Find:

1. ∠ABC
2. ∠BAD
3. ∠ABD