# HSC +2 Chemistry Nuclear Chemistry - CC1- Chapter Wise Questions

Final post of this series. Questions on Nuclear Chemistry chapter is provided below for practice. Post your answers in the comments section to these questions.

99) The phenomenon of radioactivity was discovered by:

b) Pierre Curie

c) Henry Becquerrel

d) Rutherford

100) The most penetrating radiations are:

a) $\alpha$ rays

b) $\gamma$ rays

c) $\beta$ rays

d) all are equally penetrating

101) In the nuclear reaction, $_{92}U^{238} \rightarrow \; _{82}Pb^{206}$, the number of $\alpha$ and $\beta$ particles emitted are:

a) $7\alpha, \; 5\beta$

b) $6\alpha, \; 4\beta$

c) $4\alpha, \; 3\beta$

d) $8\alpha, \; 6\beta$

102) Which one of the following particles is used to bombard $_{13}AI^{27}$ to give $_{15}P^{30}$ and a neutron:

a) $\alpha$ particle

b) deuteron

c) proton

d) neutron

103) The reaction $_{5}B^{8} \rightarrow \; _{4}B^{8}$ takes place due to:

a) $\alpha$ decay

b) $\beta$ rays

c) electron capture

d) positron decay

a) stable electronic configuration

b) stable nucleus

c) unstable nucleus

d) unstable electronic configuration

105) In the following radioactive decay, $_{92}X^{232} \rightarrow \; _{89}Y^{220}$, how many $\alpha$ and $\beta$ decay particles are ejected.

a) $3\alpha, \; 3\beta$

b) $5\alpha, \; 3\beta$

c) $3\alpha, \; 5\beta$

d) $5\alpha, \; 5\beta$

106) $_{92}U^{235}$ nucleus absorbs a neutron and disintegrates into $_{54}Xe^{139}, \; _{38}Sr^{94}$ and x. What will be the product x?

a) 3 neutrons

b) 2 neutrons

c) $\alpha$ particle

d) $\beta$ particle

107) Loss of a $\beta$ particle is equivalent to:

a) Increase of one proton only

b) Decrease of one neutron only

c) Both (a) and (b)

d) None of these

108) Which of the following is used as neutron absorber in the nuclear reactor?

a) Water

b) Deuterium

c) Some compound of Uranium