Question Statement:
The quantum effects in an ideal gas become important below a certain temperature TQ
when de Broglie wavelength corresponding to the root mean square thermal speed
becomes equal to the inter-atomic separation. For such a gas of atoms of mass 2 × 10-26
kg and number density 6.4 × 1025 m-3, TQ = __________ × 10-3 K (up to one decimal
place).
(kB = 1.38 × 10-23 J/K, ℎ = 6.6 × 10-34 J-s)
END OF THE QUESTION PAPER
Q.No. Type Section Key/Range Marks
1 MCQ GA A 1
2 MCQ GA C 1
3 MCQ GA B 1
4 MCQ GA C 1
5 MCQ GA D 1
6 MCQ GA A 2
7 MCQ GA C 2
8 MCQ GA D 2
9 MCQ GA C 2
10 MCQ GA A 2
1 MCQ PH A 1
2 MCQ PH B 1
3 MCQ PH C 1
4 MCQ PH D 1
5 MCQ PH D 1
6 MCQ PH B 1
7 MCQ PH C 1
8 MCQ PH B 1
9 MCQ PH D 1
10 MCQ PH C 1
11 MCQ PH A 1
12 MCQ PH A 1
13 MCQ PH A 1
14 MCQ PH C 1
Q.No. Type Section Key/Range Marks
15 MCQ PH B 1
16 MCQ PH C 1
17 MCQ PH B 1
18 MCQ PH D 1
19 NAT PH 0.185 to 0.189 1
20 NAT PH ‐3.7 to ‐3.5 1
21 NAT PH 4 to 4 1
22 NAT PH 1.8 to 1.8 1
23 NAT PH 6 to 61
24 NAT PH 1 to 11
25 NAT PH 297.0 to 300.1 1
26 MCQ PH D 2
27 MCQ PH C 2
28 MCQ PH A 2
29 MCQ PH A 2
30 MCQ PH C 2
31 MCQ PH B 2
32 MCQ PH A 2
33 MCQ PH C 2
34 MCQ PH D 2
35 MCQ PH A 2
36 MCQ PH B 2
37 MCQ PH C 2
38 NAT PH 1.55 to 1.58 2
Q.No. Type Section Key/Range Marks
39 NAT PH 0.70 to 0.73 2
40 NAT PH 0.28 to 0.31 2
41 NAT PH 1.6 to 1.6 2
42 NAT PH 24.4 to 27.6 2
43 NAT PH 2 to 22
44 NAT PH 0.81 to 0.84 2
45 NAT PH 81.60 to 81.80 2
46 NAT PH 0.21 to 0.23 2
47 NAT PH 0.78 to 0.82 2
48 NAT PH 6.5 to 6.7 2
49 NAT PH 6.1 to 6.3 2
50 NAT PH 0.25 to 0.25 2
51 NAT PH 466 to 467 2
52 NAT PH 256 to 256 2
53 NAT PH 0.41 to 0.43 2
54 NAT PH 1.51 to 1.53 2
55 NAT PH 78 to 90 2