1
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
In the reaction

2Al(s) + 6HCl(aq) $$\to$$ 2Al3+ (aq) + 6Cl-(aq) + 3H2(g)
A
11.2 L H2(g) at STP is produced for every mole HCl(aq) consumed
B
6 L HCl(aq) is consumed for every 3L H2(g) produced
C
33.6 L H2(g) is produced regardless of temperature and pressure for every mole that reacts
D
67.2 H2(g) at STP is produced for every mole Al that reacts
2
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
The average marks of boys in a class is 52 and that of girls is 42. The average marks of boys and girls combined is 50. The percentage of boys in the class is
A
80
B
60
C
40
D
20
3
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
The function $$f:R/\left\{ 0 \right\} \to R$$ given by

$$f\left( x \right) = {1 \over x} - {2 \over {{e^{2x}} - 1}}$$

can be made continuous at $$x$$ = 0 by defining $$f$$(0) as
A
0
B
1
C
2
D
$$-1$$
4
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
Let $$f:R \to R$$ be a function defined by

$$f(x) = \min \left\{ {x + 1,\left| x \right| + 1} \right\}$$, then which of the following is true?
A
$$f(x)$$ is differentiale everywhere
B
$$f(x)$$ is not differentiable at x = 0
C
$$f(x) > 1$$ for all $$x \in R$$
D
$$f(x)$$ is not differentiable at x = 1
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