1
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
At 80oC, the vapour pressure of pure liquid ‘A’ is 520 mm Hg and that of pure liquid ‘B’ is 1000 mm Hg. If a mixture solution of ‘A’ and ‘B’ boils at 80oC and 1 atm pressure, the amount of ‘A’ in the mixture is (1 atm = 760 mm Hg)
A
52 mol percent
B
34 mol percent
C
48 mol percent
D
50 mol percent
2
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
The vapour pressure of water at 20oC is 17.5 mm Hg. If 18 g of glucose (C6H12O6) is added to 178.2 g of water at 20oC, the vapour pressure of the resulting solution will be
A
17.675 mm Hg
B
15.750 mm Hg
C
16.500 mm Hg
D
17.325 mm Hg
3
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
Given $$E_{C{r^{3 + }}/Cr}^o$$ = -0.72 V; $$E_{Fe^{2+}/Fe}^o$$ = -0.42V, The potential for the cell Cr | Cr3+ (0.1M) || Fe2+ (0.01 M) | Fe is
A
0.26 V
B
0.399 V
C
−0.339 V
D
−0.26 V
4
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
For a reaction $${1 \over 2}A \to 2B$$ rate of disappearance of ‘A’ is related to the rate of appearance of ‘B’ by the expression
A
$$ - {{d[A]} \over {dt}}$$ = $${1 \over 2}{{d[B]} \over {dt}}$$
B
$$ - {{d[A]} \over {dt}}$$ = $${1 \over 4}{{d[B]} \over {dt}}$$
C
$$ - {{d[A]} \over {dt}}$$ = $${{d[B]} \over {dt}}$$
D
$$ - {{d[A]} \over {dt}}$$ = $$4{{d[B]} \over {dt}}$$
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