1
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1

Some energy levels of a molecule are shown in the figure with their wavelengths of transitions. Then :

NEET 2024 (Re-Examination) Physics - Atoms and Nuclei Question 1 English

A
$$\lambda_3>\lambda_2, \lambda_1=2 \lambda_2$$
B
$$\lambda_3>\lambda_2, \lambda_1=4 \lambda_2$$
C
$$\lambda_1>\lambda_2, \lambda_2=2 \lambda_3$$
D
$$\lambda_2>\lambda_1, \lambda_2=2 \lambda_3$$
2
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1

Select the correct statements among the following :

A. Slow neutrons can cause fission in $${ }_{92}^{235} \mathrm{U}$$ than fast neutrons.

B. $$\alpha$$-rays are Helium nuclei.

C. $$\beta$$-rays are fast moving electrons or positrons.

D. $$\gamma$$-rays are electromagnetic radiations of wavelengths larger than $$\mathrm{X}$$-rays.

Choose the most appropriate answer from the options given below :

A
A, B and C only
B
A, B and D only
C
A and B only
D
C and D only
3
NEET 2024
MCQ (Single Correct Answer)
+4
-1

Given below are two statements:

Statement I: Atoms are electrically neutral as they contain equal number of positive and negative charges.

Statement II: Atoms of each element are stable and emit their characteristic spectrum.

In the light of the above statements, choose the most appropriate answer from the options given below.

A
Both Statement I and Statement II are correct
B
Both Statement I and Statement II are incorrect
C
Statement I is correct but Statement II is incorrect
D
Statement I is incorrect but Statement II is correct
4
NEET 2024
MCQ (Single Correct Answer)
+4
-1

Match List I with List II:

List I
(Spectral Lines of Hydrogen for transitions from)
List II
(Wavelengths (nm))
A. $$
n_2=3 \text { to } n_1=2
$$
I. 410.2
B. $$
n_2=4 \text { to } n_1=2
$$
II. 434.1
C. $$
n_2=5 \text { to } n_1=2
$$
III. 656.3
D. $$
n_2=6 \text { to } n_1=2
$$
IV. 486.1

Choose the correct answer from the options given below:

A
A-II, B-I, C-IV, D-III
B
A-III, B-IV, C-II, D-I
C
A-IV, B-III, C-I, D-II
D
A-I, B-II, C-III, D-IV
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