# Solved papers for NEET Chemistry NEET PYQ-Nuclear Chemistry

### done NEET PYQ-Nuclear Chemistry Total Questions - 8

• question_answer1) Sulphur = 35 (34.96903 amu) emits a $\beta$-particle but no $\gamma$-ray. The product is chlorine = 35 (34.96885 amu). The maximum energy emitted by the alpha-particle is:                    [AIPMT 1999]

A)
16.758 MeV

B)
1.6758 MeV

C)
0.16758 MeV

D)
0.016758 MeV

• question_answer2) In the following radioactive decay, $_{92}{{X}^{232}}\xrightarrow[{}]{{}}{{\,}_{89}}{{Y}^{220}},$ how many $\alpha$ and $\beta$ particles are ejected from X to Y? [AIPMT 1999]

A)
$3\,\alpha$ and $2\,\beta$

B)
$5\,\alpha$ and

C)
$3\,\alpha$ and $3\,\beta$

D)
$5\,\alpha$ and $5\,\beta$

• question_answer3) The half-life of $_{6}{{C}^{14}},$ ($\lambda =2.31\times {{10}^{4}}$ per year) is: [AIPMT 1999]

A)
$2\times {{10}^{2}}$ year

B)
$3\times {{10}^{3}}$ year

C)
$3.3\times {{10}^{4}}$ year

D)
$4\times {{10}^{3}}$ year

• question_answer4) The half-life of a radioactive isotope is three hours. If the initial mass of the isotope was 300 g, the mass which remained undecayed after 18 hours would be:                                 [AIPMT 2000]

A)
4.68 g

B)
2.34 g

C)
1.17 g

D)
9.36 g

• question_answer5)  A human body required the 0.01 M activity of radioactive substance after 24 hour. Half-life of radioactive is 6 hour. Then injection of maximum activity of radioactive substance that can be injected: [AIPMT 2001]

A)
0.08

B)
0.04

C)
0.16

D)
0.32

• question_answer6) If $_{b}^{a}X$ species emit firstly a positron, then two $\alpha$ and two $\beta$ and in last one a is also emitted and finally convert in $_{d}^{c}Y$ species so correct relation is: [AIPMT 2001]

A)
$a=c+12,\text{ }d=b5$

B)
$a=c-8,\text{ }d=b-1$

C)
$a=c-6,\text{ }d=b-0$

D)
$~a=c-4,\text{ }a=b-2$

• question_answer7) $_{92}{{U}^{235}}$ nucleus absorb a neutron and disintegrate in $_{54}X{{e}^{139}}{{,}_{38}}S{{r}^{94}}$ and X so, what will be product X : [AIPMT 2002]

A)
3-neutrons

B)
2-neutrons

C)
$\alpha$-particle

D)
$\beta$-particle

• question_answer8) The radioisotope, tritium $(\,_{1}^{3}H)$ has a half-life of 12.3 years. If the initial amount of tritium is 32 mg, how many milligrams of it would remain after 49.2 years?                               [AIPMT 2003]

A)
4 mg

B)
8 mg

C)
1 mg

D)
2 mg