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Which among the given is not a chemical reaction -

Which of the following produced by the solar energy transformation by using photovoltaic cell?

Earths atmosphere is an envelope of gases extending to a height of

In which form the chemical compound RDX is used?

Thomas Clifford Allbutt is associated with the invention of

Which among the given is not a commercial source of energy -

Which of the following produces antibodies?

A small magnet of dipole moment M is kept on the arm of a deflection magnetometer sat in tan A position at a distance of 0.2 m. If the deflection is 60°, the value of M is (BH = 0.4 × 10-4 T)

Ecology deals with

Positive oxidation state of oxygen is possible only in

The gas used in the artificial ripening of fruits is

Three identical vessels A, B and C are filled with water, mercury and kerosene respectively up to an equal height. The three vessels are provided with identical taps at the bottom of the vessels. If the three taps are opened simul-taneously, then which vessel is emptied first?

Which among the given is not a donor atom

Which of the following shows that the Earth behaves as a magnet ?

A substance which changes readily into vapour without heating is called

Effect of light on photocells produces

In which of the following diseases copper accumulates in tissues ?

The gas used to dilute oxygen for breathing by deep sea divers is:

Thrombosis is a disease of the-

Which among the given is not a natural source of hydrocarbon

which of the following statements are correct

A substance which readily forms colloidal solution in contact with water is called

Effect of lightning power was discovered by ?

In which of the following era began the Self replicating RNA molecules on Earth ?

Tikka disease is related with the crop