Give a reason: Chemical fertilizers must be replaced by organic manure

What is soil conservation?

If (k –3), (2k + 1) and (4k + 3) are three consecutive terms of an A.P,  find the value of k

(i) Define couple

(ii) State the S.I. unit of moment of couple.

The model of a building is constructed with the scale factor 1 : 30.

1. If the height of the model is 80 cm, find the actual height of the building in meters.
2. If the actual volume of a tank at the top
...

Calculate the effective resistance across AB:

Action of dilute Hydrochloric acid on iron (II) sulphide.

Name the following: The multi-purpose project based on the River Sutlej

Give two advantages that non-conventional energy sources have over conventional energy sources.

The process of uptake of mineral ions against the concentration gradient using energy from the cell.

State any one federal feature of the Indian Constitution.

To which wire should the fuse be connected?

What is Mixed farming? Mention any one benefit of Mixed farming

Heating of Ethanol at 170oC in the presence of conc. Sulphuric acid.

Write a balanced chemical equation.

Give a reason: Cottage industries are significant for our economy

Action of dilute Sulphuric acid on Sodium Sulphite.

Write balanced chemical equation.