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A rectifier is an electronic device used to convert

During sleep a mans blood pressure

In Which among the given substances all carbon atoms are quaternary in nature

The gas predominantly responsible for global warming is

The yellow colour of human urine is due to a pigment called?

Which among the given is biodegradable -

Which of the following phenomenon helps to conclude that light is a transverse wave?

A ripe Tomato is Red, Leaves are Green, Flower is Purple, Hair is Black. Bring out the pigments responsible for these colors respectively ?

During the day time plants

In which among the given will you look for E. Coli?

Which among the given is colourless

Which of the following places are main centers of silicosis and silico-tuberculosis diseases affecting the workers in India?

A rubber ball is dropped from a height of 2 metres. To what height will it rise if there is no loss of energy/velocity after rebounding -

Dynamo is

In which decade was the SPICE simulator introduced?

Pollutant from motor car exhaust that causes mental disease is

The gas that is used in the manufacture of vanaspati ghee is:

Therm is the unit of -

Which among the given is not a chemical action?

Which of the following process are associated with plants during dark period ?

A second pendulum is a pendulum whose time period is

Earth is a-

In which decade was the telephone invented?

The gas used for artificial fruit ripening of green fruit is -

This group of alumino-silicate minerals is widely used in making electrical insulators

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