1
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
At 273 K temperature and 76 cm Hg pressure the density of a gas is 1.964 g L-1. The gas is
A
CH4
B
CO
C
He
D
CO2
2
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Equal masses of ethane and hydrogen are mixed in an empty container at 298 K. The fraction of total pressure exerted by hydrogen is
A
15:16
B
1:1
C
1:4
D
1:6
3
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
An ideal gas expands adiabatically against vacuum. Which of the following is correct for the given process?
A
$$\Delta $$S = 0
B
$$\Delta $$T = $$ - $$ve
C
$$\Delta $$U = 0
D
$$\Delta $$P = 0
4
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Kf (water) = 1.86 K kg mol-1. The temperature at which ice begins to separate from a mixture of 10 mass % ethylene glycol is
A
$$ - $$1.86 $$^\circ $$C
B
$$ - $$3.72 $$^\circ $$C
C
$$ - $$3.3 $$^\circ $$C
D
$$ - $$3 $$^\circ $$C
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