1
AP EAPCET 2021 - 20th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

For a $$A+B \rightarrow$$ products, the rate of the reaction is given by rate $$=k[A][B]^2$$. The units of rate constant $$(k)$$ will be

A
$$\mathrm{mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$$
B
$$\mathrm{L} \mathrm{~mol} \mathrm{~s}^{-1}$$
C
$$\mathrm{mol}^2 \mathrm{~L}^{-2} \mathrm{~s}^{-1}$$
D
$$\mathrm{mol}^{-2} \mathrm{~L}^2 \mathrm{~s}^{-1}$$
2
AP EAPCET 2021 - 20th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

For an elementary reaction, $$X(g) \longrightarrow Y(g)+Z(g)$$, the $$t_{1 / 2}$$ is $$10 \mathrm{~min}$$. In what period of time would the concentration of $$X$$ be reduced to $$10 \%$$ of its original concentration?

A
$$20 \mathrm{~min}$$
B
$$33.2 \mathrm{~min}$$
C
$$15 \mathrm{~min}$$
D
$$25.2 \mathrm{~min}$$
3
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which statement among the following is incorrect?

A
Unit of rate of reaction is $$\mathrm{m} \mathrm{s}^{-1}$$.
B
Unit of rate of disappearance is $$\mathrm{m} \mathrm{s}^{-1}$$.
C
Unit of rate constant $$k$$ depends upon order of reaction.
D
Unit of rate constant $$k$$ for a first order reaction is $$\mathrm{m} \mathrm{s}^{-1}$$.
4
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

For zero order reaction, a plot of $$t_{1 / 2}$$ versus $$[A]_0$$ will be

A
a straight line passing through the origin and slope $$=k$$
B
a horizontal line (parallel to $$x$$-axis)
C
a straight line with slope $$-k$$
D
a straight line passing through origin and slope $$=\frac{1}{2 k}$$

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