0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

Reason
In $$\alpha-$$ decay the mass number decreases by $$4$$ and atomic number decreases by $$2$$ In $$\beta-$$ decay the mass number remains unchanged, but atomic number increases by $$1$$ only.
Assertion
$$z^{X^{A}}$$ undergoes $$2\alpha-$$ decays. $$2\beta-$$ decays and $$2\gamma-$$ decays and the daughter product is $$z-2^{Y^{A-8}}$$
$$z^{X^{A}}$$ undergoes $$2\alpha-$$ decays. $$2\beta-$$ decays and $$2\gamma-$$ decays and the daughter product is $$z-2^{Y^{A-8}}$$

A
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
B
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
C
Assertion is correct but Reason is incorrect
D
Both Assertion and Reason are incorrect
Solution
Verified by Toppr

Correct option is A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
After the first two $$\alpha$$ decays the mass number will decrease by $$8$$ and the atomic number will decrease by $$4$$ which will make,
$$_{z-4}X^{A-8}$$
After the next two $$\beta$$ decays, the atomic number will increase by 2 units. The product will be,
$$_{z-2}X^{A-8}$$
After the last two $$\gamma$$ decays, the atomic number and the mass number will remain unchanged. Final daughter product is
$$_{z-2}X^{A-8}$$
The assertion is therefore correct and the reason is also correct which is the correct explanation for assertion.
The answer is option (A).

Was this answer helpful?
0
Similar Questions
Q1
Reason
In $$\alpha-$$ decay the mass number decreases by $$4$$ and atomic number decreases by $$2$$ In $$\beta-$$ decay the mass number remains unchanged, but atomic number increases by $$1$$ only.
Assertion
$$z^{X^{A}}$$ undergoes $$2\alpha-$$ decays. $$2\beta-$$ decays and $$2\gamma-$$ decays and the daughter product is $$z-2^{Y^{A-8}}$$
$$z^{X^{A}}$$ undergoes $$2\alpha-$$ decays. $$2\beta-$$ decays and $$2\gamma-$$ decays and the daughter product is $$z-2^{Y^{A-8}}$$
View Solution
Q2
Assertion :ZXA undergoes 2 αdecays, 2β decays and 2γ - decays and the daughter product is Z2XA8. Reason: In αdecays the mass number decreases by 4 and the atomic number decreases by 2. In 2βdecays the mass number remains unchanged, but atomic number increases by 1 only.
View Solution
Q3
Assertion :ZX4 undergoes 2αdecays,2βdecays (negative β), and 2γdecays. As a result, the daughter product is z2YAB Reason: In αdecay, the mass number decreases by 4 unit and atomic number decreases by 2 unit. In βdecay (negative β), the mass number remains unchanged and atomic number increases by 1 unit. In γdecay, mass number and atomic number remain unchanged.
View Solution
Q4
STATEMENT - 1 : ZXA undergoes 2 α decays, 2β decays (negative β) and 2 decays. As a result the daughter product is
Z2YA8.
STATEMENT -2 : In α decay the mass number decreases by 4 unit and atomic number decreases by 2 unit. In β decay (negative β) the mass number remains unchanged and atomic number increases by 1 unit. In γ decay, mass number and atomic number remains unchanged.
View Solution
Q5
Assertion :zXA undergoes 2 α- decays, 2 β- decays (negative β) and 2 γ-decays. As a result , the daughter product is z2YA8 Reason: In α- decay, the mass number decreases by 4 unit and atomic number decreases by 2 unit. In β- decay (negative β), the mass number remains unchanged and atomic number increaess by 1 unit. In γ-decay, mass number and atomic number remain unchanged
View Solution