JEE CHEMISTRY MCQ: CHEMICAL KINETICS

1 Easy

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Analyzing +4 | -1

With the help of following reactions, arrange metals A, B, D and E in decreasing order of their reactivity ?

(a)

B +{ANO}_3 \rightarrow {BNO}_3+ A

(b)

A +{HCl} \rightarrow {ACl}+\frac{1}{2} {H}_2

(c)

D +{ECl} \rightarrow {DCl}+ E

(d)

D +{HNO}_3 \rightarrow

No reaction

View answer and explanation

Correct option: B

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Option B (B > A > D > E) is correct because it correctly orders the metals based on their reactivity as determined by the given reactions.

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\mathrm{A}_2+\mathrm{B}_2 \rightarrow 2 \mathrm{AB}

\begin{aligned} & {{\text{A}}_2}\mathop \rightleftharpoons \limits_{{{\text{k}}_{ - 1}}}^{{{\text{k}}_1}} {\text{A}} + {\text{A (fast) }} \\ & \mathrm{A}+\mathrm{B}_2 \xrightarrow{\mathrm{k}_2} \mathrm{AB}+\mathrm{B} \text { (slow) } \\ & \mathrm{A}+\mathrm{B} \rightarrow \mathrm{AB} \text { (fast) } \end{aligned}

k

(Initial\mathrm{ }conc.\mathrm{ } = a)

C_0 \sqrt{T}

C_0

T

100 \mathrm{~kJ/mol}.

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\log _{10} \frac{K_2}{K_1}

27^{\circ} \mathrm{C}

2.303 \times 8.314=19.147