1
TG EAPCET 2025 (Online) 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

During the disintegration of a radioactive nucleus of mass number 208 at rest, two alpha particles each with kinetic energy $E$ are emitted. The total kinetic energy of the emitted alpha particles and the daughter nucleus after the disintegration is

A

$\frac{51 E}{25}$

B

$\frac{51 E}{50}$

C

$\frac{52 E}{25}$

D

$\frac{26 E}{25}$

2
TG EAPCET 2025 (Online) 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the total energy of an electron in an orbit is positive, then

A

electron will revolve in a circular orbit.

B

electron will revolve in an elliptical orbit.

C

electron will not follow a closed orbit.

D

electron will fall into the nucleus.

3
TG EAPCET 2025 (Online) 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If $87.5 \%$ of atoms of a radioactive element decay in 6 days, then the fraction of atoms of the element that decay in 8 days is

A

$1 / 8$

B

$\frac{7}{8}$

C

$1 / 16$

D

$15 / 16$

4
TG EAPCET 2025 (Online) 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the ratio of the mass numbers of two nuclei is $27: 125$, then the ratio of their surface areas is

A

$3: 5$

B

$9: 25$

C

$27: 125$

D

$1: 1$

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