1
JEE Main 2019 (Online) 10th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The process with negative entropy change is :
A
Dissociation of CaSO4 (s) to CaO(s) and SO3(g)
B
Dissolution of iodine in water
C
Synthesis of ammonia from N2 and H2
D
Sublimation of dry ice
2
JEE Main 2019 (Online) 10th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The amount of sugar (C12H22O11) required to prepare 2L of its 0.1 M aqueous solution is :
A
17.1 g
B
34.2 g
C
68.4 g
D
136.8 g
3
JEE Main 2019 (Online) 10th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Elevation in the boiling point for 1 molar solution of glucose is 2 K. The depression in the freezing point for 2 molal solution of glucose in the same solvent is 2 K. The relation between Kb and Kf is
A
Kb = Kf
B
Kb = 0.5 Kf
C
Kb = 1.5 Kf
D
Kb = 2 Kf
4
JEE Main 2019 (Online) 10th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
An ideal gas undergoes isothermal compression from 5m3 to 1 m3 against a constant external pressure of 4 Nm–2. Heat released in this process is used to increase the temperature of 1 mole of Al. If molar heat capacity of Al is 24 J mol–1 K–1, the temperature of Al increases by :
A
$${2 \over 3}K$$
B
$${3 \over 2}K$$
C
1 K
D
2 K
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