Artificial Radioactivity

Q. ${}_6{C}^{14}$ is formed from ${}_7{N}^{14}$ in the upper atmosphere by the action of the fundamental particle

1. Positron
2. Neutron
3. Electron
4. Proton

Q. Which ones of the following reactions are artificial radioactive decay?

1. ${}_{92}{}^{238}U{\to }_{90}{}^{234}Th+\alpha$
2. ${}_{12}{}^{24}Mg+{\beta }^{+}{\to }_{13}{}^{24}Al$
3. ${}_4{}^{9}Be{+}_2{}^{4}He{\to }_6{}^{12}C+n$
4. ${}_{92}{}^{238}U{\to }_{90}{}^{234}Th+\beta$

Q. ${}_6{C}^{14}$ is formed from ${}_7{N}^{14}$ in the upper atmosphere by the action of the fundamental particle

1. Positron
2. Neutron
3. Electron
4. Proton

Q. Which one of the following nuclear transformation is (n, p ) type

1. ${}_{3}L{i}^7{+}_1{H}^1{\to }_{4}B{e}^7{+}_0{n}^1$
2. ${}_{33}A{s}^{75}+2H{e}^4{\to }_{35}B{r}^{78}{+}_0{n}^1$
3. ${}_{83}B{i}^{209}{+}_1{H}^2{\to }_{84}P{0}^{210}{+}_0{n}^1$
4. ${}_{21}S{c}^{45}{+}_0{n}^1{\to }_{20}C{a}^{45}{+}_1{H}^1$

Q. Which ones of the following reactions are artificial radioactive decay?

1. ${}_{92}{}^{238}U{\to }_{90}{}^{234}Th+\alpha$
2. ${}_{12}{}^{24}Mg+{\beta }^{+}{\to }_{13}{}^{24}Al$
3. ${}_4{}^{9}Be{+}_2{}^{4}He{\to }_6{}^{12}C+n$
4. ${}_{92}{}^{238}U{\to }_{90}{}^{234}Th+\beta$

Q. Which ones of the following statements are true for given reaction?
${}_4{}^{9}Be{+}_1{}^{3}H{\to }_5{}^{11}B{+}_0{}^{1}n$

1. It is a fusion reaction
2. It is natural radioactive decay
3. Total neutron number is conserved
4. Total proton count is conserved

Q.

Assertion : Protones are more effective than neutrons of equal energy in causing artificial disintegration of atoms.

Reason : Neutrons are neutral they penetrate the nucleus.

1. If both assertion and reason are true and the reason is the correct explanation of the assertion.
2. If both assertion and reason are true but reason is not the correct explanation of the assertion.
3. If assertion is true but reason is false.
4. If the assertion and reason both are false.
5. If assertion is false but reason is true.

Q. The first artificial disintegration of an atomic nucleus was achieved by

1. Geiger
2. Wilson
3. Madame curie
4. Rutherford
5. Soddy