Home
Class 12
CHEMISTRY
Assertion (A) : K- shell electron captur...

Assertion `(A) : K-` shell electron capture is detected by analyzing the wavelength of `X-` ray emitted.
Reason `(R):` The wavelength of the `X-` ray is characteristic of the daughter element and not the parent element. a)If both `(A)` and `(R)` are correct , and `(R)` is the correct explanation of `(A)` b)If both `(A)` and `(R)` are correct, but (R) is not the correct explanation of `(A)` c)If `(A)` is correct, but `(R)` is incorrect. d)If `(A)` is incorrect, but `(R)` is correct.

A

STATEMENT-1 is True, STATEMENT-2 is True, STATEMENT-2 is correct explanation for STATEMENT-1

B

STATEMENT-1 is True, STATEMENT-2 is True, STATEMENT-2 is NOT a correct explanation for STATEMENT-1

C

STATEMENT-1 is True, STATEMENT-2 is False

D

STATEMENT-1 is False, STATEMENT-2 is True

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion (A) : Galvanized iron is protected from Rusting. Reason (R): Zn is less reactive than Fe . (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) . (b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A) . (c)If (A) is correct, but (R) is incorrect. (d)If (A) is incorrect, (R) is correct.

Assertion (A): I_(2) can displace Cl_(2) form NaClO_(3) . Reason (R ): I is more electronegative than CI. If both (A) and (R) are correct, and (R) is the correct explanation of (A) If both (A) and (R) are correct, but (R) is not the correct explanation of (A). If (A) is correct, but (R) is incorrect. If (A) is incorrect, but (R) is correct.

Assertion (A): The flourine has lower reactivity. Reason (R ): F-F bond has low bond dissociation energy. If both (A) and (R) are correct, and (R) is the correct explanation of (A) If both (A) and (R) are correct, but (R) is not the correct explanation of (A). If (A) is correct, but (R) is incorrect. If (A) is incorrect, but (R) is correct.

Assertion: A reaction cannot become fast by itself unless a catalyst is added. Reason: A catalyst always increases the speed of a reaction. (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) (b)If both (A) and (R) are correct, but (R) is the correct explanation of (A). (c)If (A) is correct, but (R) is incorrect. (d)If (A) is incorrect, but (R) is correct.

Assertion: La should be the f-block element according to Aufbau principle. Reason: 57th electron exceptionally enters in 5d orbital. If both (A) and (R) are correct and (R) is the correct explanation of (A). If both (A) and (R) are correct, but (R) is not the correct explanation of (A). If (A) is correct, but (R) is incorrect. If (A) is incorrect but (R) is correct.

Assertion(A): Physical adsorption of milecules on the surface requires activation energy. Reason(R): Because the bonds of adsorbed molecules are broken. (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) (b)If both (A) and (R) are correct, but (R) is the correct explanation of (A). (c)If (A) is correct, but (R) is incorrect. (d)If (A) is incorrect, but (R) is correct. S

Assertion (A) : in CsCl crystal, Cs^(o+) ions asopt bcc arragement. Reason (R ) : For N atoms adopting bcc arragement, there are 2N OVs . a.If both (A) and (R) are correct, and (R) is the correct explanation of (A) b.If both (A) and (R) are correct, but (R) is not the correct explanation of (A) c.If (A) is correct, but (R) is incorrect. d.If both (A) is incorrect, but (R) is correct.

Assertion (A) : Group- 15 -doped crystal of Si are called n -type semiconductors. Reason (R ) : Neutrons are responsible for the semi-conducting properties. (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) (b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A) (c)If (A) is correct, but (R) is incorrect. (d)If both (A) is incorrect, but (R) is correct.

Assertion(A): Fruit formation process shows increase in the rate with passage of time. Reason(R): Hydrolysis of these ester is homogeneous autocatalytic reaction. (a)If both (A) and (R) are correct, and (R) is the correct explanation of (A) (b)If both (A) and (R) are correct, but (R) is the correct explanation of (A). (c)If (A) is correct, but (R) is incorrect. (d)If (A) is incorrect, but (R) is correct.

Assertion (A) : CsCl crystal, the coordination number of Cs^(o+) ion is 8 . Reason (R ) : Cl^(ɵ) ion in CsCl adopt bcc type of packing, a.If both (A) and (R) are correct, and (R) is the correct explanation of (A) b.If both (A) and (R) are correct, but (R) is not the correct explanation of (A) c.If (A) is correct, but (R) is incorrect. d.If both (A) is incorrect, but (R) is correct.