SSC General science MCQ GK Questions and Answers

The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be of its original weight.

One 'amu' is equivalent to

Which is a fertile nuclear fuel?

The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about metres/second.

Atoms of U-238 and U-235 differ in structure by three

What is the wavelength of visible spectrum?

If energy is released from a system, it's mass

Atoms with same number of neutrons, but different number of nucleons are called

The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life per

Atoms of an element differ from those of all other elements in

In gamma emission, change in nucleon number is

A moderator the neutrons.

Nuclear power is thermal power.

Heat is generated in a nuclear reactor (thermal) by

Coolant present in the primary circuit of a pressurised water reactor is high pressure