Beta Decay

Q.

The beta particle consists of

1. high-energy rays

2. 1 neutron

3. 2 neutrons and 2 protons

4. 1 electron

Q. Antineutrino has charge.

1. \N
2. 1
3. 2

Q.

The beta particle consists of

1. high-energy rays

2. 1 neutron

3. 2 neutrons and 2 protons

4. 1 electron

Q. In which radioactive disintegration, neutron dissociates into proton and electron

1. $H{e}^{++}-emission$
2. $\beta -emission$
3. $\gamma -emission$
4. $Positronemission$

Q. In an electron capture, electron from K shell falls into a nucleus to undergo beta decay.

1. False
2. True

Q. ${\beta }^{-}$decay happens when N/Z ratio is lesser as compared to that of stability region.

1. False
2. True

Q. What is the respective number of $\alpha$ and $\beta$ particles emitted in the following radioactive decay ${}_{90}{X}^{200}{\to }_{80}{Y}^{168}$

1. 6 and 8
2. 8 and 8
3. 6 and 6
4. 8 and 6

Q. In an electron capture, electron from K shell falls into a nucleus to undergo beta decay.

1. False
2. True

Q. In beta decay, an electron, $e^{-}$ (or a positron, $e^{+}$) is emitted by a nucleus. What happens to the atom, among the following options?

1. The atom gets positively charged if $e^{-}$ is emitted, or negatively charged if $e^{+}$ is emitted
2. The atom gets negatively charged if $e^{-}$ is emitted, or positively charged if $e^{+}$ is emitted
3. The atom stays neutral, since a proton is also created to balance the charge
4. Any of the three can take place, depending on other factors.

Q. In the given nuclear reaction, A, B, C, D, E represents
${}_{92}{U}^{238}\stackrel{\alpha }{⟶}{}_{B}T{h}^A\stackrel{\beta }{⟶}{}_{D}P{a}^C\stackrel{E}{⟶}{}_{92}{U}^{234}$

1. $A=234,B=90,C=234,D=91,E=\beta$
2. $A=234,B=90,C=238,D=94,E=\alpha$
3. $A=238,B=93,C=234,D=91,E=\beta$
4. $A=234,B=90,C=234,D=93,E=\alpha$

Q. What is the respective number of $\alpha$ and $\beta$ particles emitted in the following radioactive decay ${}_{90}{X}^{200}{\to }_{80}{Y}^{168}$

1. 6 and 8
2. 8 and 8
3. 6 and 6
4. 8 and 6

Q. Antineutrino has charge.

1. \N
2. 1
3. 2

Q. Positron has a charge.

1. positive
2. negative
3. zero

Q. A radioactive nucleus decays from ${}_{92}{X}^{235}$ to ${}_{91}{Y}^{231}$. Which of the following particles are emitted

1. One alpha and one electron
2. Two deuterons and one positron
3. One alpha and one proton
4. One proton and four neutrons

Q. When a nucleus with atomic number $Z$ and mass number $A$ undergoes a radioactive decay process,

$\left(1\right)$ Both $Z$ and $A$ will decrease, if the process is $\alpha$ decay.
$\left(2\right)$ $Z$ will decrease, but $A$ will not change, if the process is ${\beta }^{+}$ decay.
$\left(3\right)$ $Z$ will increase, but $A$ will not change, if the process is ${\beta }^{-}$ decay.
$\left(4\right)$ $Z$ and $A$ will remain unchanged, if the process is $\gamma$ decay.

1. All are true
2. $1$ & $2$ are true
3. $1$, $2$ & $3$ are true
4. $3$ & $4$ are true