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1
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

5 g sucrose (molar mass = 342) is dissolved in 100 g of solvent, decreases the freezing point by 2.15 K. What is cryoscopic constant of solvent?

A
14.7 K kg mol$$^{-1}$$
B
2.15 K kg mol$$^{-1}$$
C
4.30 K kg mol$$^{-1}$$
D
7.35 K kg mol$$^{-1}$$
2
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is Henry's law constant if solubility of a gas in water at $$298 \mathrm{~K}$$ and 1 bar pressure is $$7\times10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}$$ ?

A
$$2.0 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}$$ bar$$^{-1}$$
B
$$7.0 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{bar}^{-1}$$
C
$$3.5 \times 10^{-3} \mathrm{~mol} \mathrm{~L}^{-1}$$ bar$$^{-1}$$
D
$$3.1 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}$$ bar$$^{-1}$$
3
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0
Which of the following formulae is used to obtain depression in freezing point?

A
$$\Delta T_f=\frac{T_f^{\circ}}{T_f}$$
B
$$\Delta T_f=T_f^{\circ}-T_f$$
C
$$\Delta \mathrm{T}_{\mathrm{f}}-\mathrm{T}_{\mathrm{f}}=\mathrm{T}_{\mathrm{f}}^{\circ}$$
D
$$\Delta T_f=\frac{T_f}{T_f^{\circ}}$$
4
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

The vapour pressure of a solvent decreases by 2.5 mm Hg by adding a solute. What is the mole fraction of solute? (Vapour pressure of pure solvent is 250 mm Hg)

A
0.88
B
0.01
C
0.1
D
0.99
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