Q.1.

Nuclear fuel usually used in a Boiling Water Reactor (BWR) is

Q.2.

β-rays emission in radioactive disintegration is always accompanied by the emission of

Q.3.

Indian monazite sand contains __________ percent thorium.

Q.4.

Pick out the wrong statement.

Q.5.

The molecular weight of heavy water is

Q.6.

Which of the following is not a good moderating material ?

Q.7.

The new nucleus formed after β-decay of a radioactive element has

Q.8.

Hydrogen differs from deuterium in __________ properties.

Q.9.

Percentage of the heavy water in ordi water is around

Q.10.

Energy produced in the nuclear fission is of the order of __________ MeV.

Q.11.

Both tritium and deuterium have the same number of

Q.12.

The phenomenon of nuclear fission is opposite to that of

Q.13.

An ideal coolant for a nuclear reactor should

Q.14.

The size of an atom is of the order of one

Q.15.

'Light water' used as a coolant in nuclear reactor is nothing but

Q.16.

Isotopes of an element have different

Q.17.

Uranium Corporation of India Limited (UCIL) engaged in the mining & concentration of uranium ore is located at

Q.18.

Positron is a/an

Q.19.

Which of the following accounts for the maximum energy release in the nuclear fission process ?

Q.20.

'Heavy water' is termed as 'heavy' because it is

Q.21.

A pressurised water reactor (PWR) uses pressurised water as a

Q.22.

Uranium is recovered from its ore (pitchblende) by

Q.23.

Which of the following isotopes is not present in natural uranium ?

Q.24.

In a pressurised water reactor (PWR), the

Q.25.

Isotopes of an element have the same

Q.26.

Extraction of uranium from its ore is done by __________ method.

Q.27.

Pressure in a Pressurised Water Reactor (PWR) is used for

Q.28.

The phenomenon of radioactivity was discovered by

Q.29.

Which of the following is the best nuclear fuel?

Q.30.

Which of the following is present in Bhabha Atomic Research Centre (BARC) complex, Trombay (Bombay) ?