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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
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