The main constituent of vinegar is

White phosphorus glows in the dark due to

Which of the following are the properties of an electron?

1. Electron is a constituent of cathode ray.

2. Electron is a negatively charged particle.

3. The mass of the electron is equal to the mass of the proton.

4. Electron is deflected by the electric field but not by magnetic field.

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Which of the following statements regarding heavy water are correct?

1. It is extensively used as a moderator in nuclear reactors.

2. It cannot be used in exchange reaction to study reaction mechanism.

3. Viscosity of heavy water is relatively smaller than that of ordinary water.

4. The dielectric constant of heavy water is smaller than that of ordinary water.

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