Question
The mass of 11.2 L of NH₃ gas at S.T.P. is (a) 17 g (b) 8.5 g (c) 34 g (d) 11.2 g
The mass of 11.2 L of NH₃ gas at S.T.P. is: [N = 14, H = 1] (a) 17 g (b) 8.5…
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Question
Which of the following gases does not help in the depletion of the ozone layer?
Which of the following gases does not help in the depletion of the ozone layer? (a) CFC (b) NO (c) CO₂ (d)…
Question
Give one example of reducing property of H₂S.
Give one example of reducing property of H₂S.
Question
Why is the red colour selected for danger signal lights?
Why is the red colour selected for danger signal lights?
Question
CH₃COOH is an organic compound but NaHCO₃ is not an organic compound — give reason.
CH₃COOH is an organic compound but NaHCO₃ is not an organic compound — give reason.
Question
Which one among the radioactive rays is an electromagnetic wave?
Which one among the radioactive rays is an electromagnetic wave?
Question
Write the volume of one mole oxygen gas at S.T.P.
Write the volume of one mole oxygen gas at S.T.P.
Question
What is the S.I. unit of specific resistance or resistivity?
What is the S.I. unit of specific resistance or resistivity?
Question
State one harmful effect of ultraviolet rays.
State one harmful effect of ultraviolet rays.