1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Which of the following is correct order of their increasing boiling points?

A
10$$^{-4}$$ M NaCl > 10$$^{-3}$$ M MgCl$$_2$$ > 10$$^{-2}$$ M NaCl > 10$$^{-4}$$ M urea.
B
10$$^{-2}$$ M NaCl > 10$$^{-3}$$ M MgCl$$_2$$ > 10$$^{-4}$$ M NaCl > 10$$^{-4}$$ M urea.
C
10$$^{-4}$$ M urea > 10$$^{-4}$$ M NaCl > 10$$^{-3}$$ M MgCl$$_2$$ > 10$$^{-2}$$ M NaCl >
D
10$$^{-2}$$ M NaCl > 10$$^{-3}$$ M MgCl$$_2$$ > 10$$^{-4}$$ M NaCl > 10$$^{-4}$$ M urea.
2
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The specific conductivity of a solution containing 1.0 g of anhydrous BaCl$$_2$$ in 200 cm$$^3$$ of the solution has been found to be 0.0058 Scm$$^{-1}$$. The molar and equivalent conductivity of the solution respectively are

A
120.83 S cm$$^2$$ eq$$^{-1}$$ and 241.67 S cm$$^2$$ eq$$^{-1}$$
B
150.5 S cm$$^2$$ eq$$^{-1}$$ and 289.7 S cm$$^2$$ eq$$^{-1}$$
C
241.6 S cm$$^2$$ mol$$^{-1}$$ and 120.83 S cm$$^2$$ eq$$^{-1}$$
D
248.6 S cm$$^2$$ mol$$^{-1}$$ and 180.3 S cm$$^2$$ eq$$^{-1}$$
3
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

For the reaction 2N$$_2$$O$$_5$$ $$\to$$ 4NO$$_2$$ + O$$_2$$, rate constant $$k$$ is 4.48 $$\times$$ 10$$^{-5}$$ s$$^{-1}$$ and the initial pressure is 600 atm. After 10 min, determine the final pressure of N$$_2$$O$$_5$$.

A
590 atm
B
490 atm
C
588 atm
D
580 atm
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Calculate the difference between C$$_p$$ and C$$_V$$ for 10 moles of an ideal gas

A
83.14 J/K
B
8.314 J/K
C
831.4 J/K
D
0.831 J/K
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