1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The coefficient of volume expansion of glycerine is $$49 \times 10^{-5} \mathrm{~K}^{-1}$$. The percentage change in its density for a $$50^{\circ} \mathrm{C}$$ rise in temperature is

A
3.54
B
5.24
C
4.25
D
2.45
2
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The latent heat of vaporisation of water is $$2240 \mathrm{~J}$$. If the work done in the process of vaporisation of $$1 \mathrm{~g}$$ is $$168 \mathrm{~J}$$, the increase in internal energy is

A
1408 J
B
2072 J
C
2208 J
D
2408 J
3
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Internal energy of $$\mathrm{n}_1$$ moles of hydrogen at temperature T is equal to internal energy of $$\mathrm{m}_2$$ moles of helium at temperature 2T. The ratio $$\frac{n_1}{n_2}$$ is

A
$$\frac{6}{5}$$
B
$$\frac{3}{7}$$
C
$$\frac{5}{3}$$
D
$$\frac{3}{2}$$
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A cylinder of fixed capacity 44.81 contains hydrogen gas at STP. What is the amount of heat needed to raise the temperature of the gas in the cylinder by $$20^{\circ} \mathrm{C}$$ ? ($$R=8.31 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$$)

A
541 J
B
374 J
C
831 J
D
743 J
COMEDK Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
CBSE
Class 12