The rate constant of a first order reaction whose half-life is 48… - Vidyadip

MCQ

The rate constant of a first order reaction whose half-life is $ 480\,\sec$ , is

A
$2.88 \times {10^{ - 3}}\,{\sec ^{ - 1}}$
✓
$1.44 \times {10^{ - 3}}\,{\sec ^{ - 1}}$
C
$1.44\,{\sec ^{ - 1}}$
D
$0.72 \times {10^{ - 3}}\,{\sec ^{ - 1}}$

✓

Answer

Correct option: B.

$1.44 \times {10^{ - 3}}\,{\sec ^{ - 1}}$

b
(b)${t_{1/2}} = \frac{{0.693}}{k},\,\,k = \frac{{0.693}}{{480}} = 1.44 \times {10^{ - 3}}\,{\sec ^{ - 1}}$.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

From the following the largest number of atoms are in

Which branched chain isomer of hydrocarbon with molecular mass 72 u gives only one mono substituted alkyl halide

Which of the following series correctly represents relations between the elements from $X$ to $Y$ ? $X \to Y$

Identify product $Z$ in the following reaction sequence

${H_2}C = CHC{H_2}Br\xrightarrow{{NaCN}}Y\xrightarrow[{2.\,{H_3}{O^ + }}]{\begin{subarray}{l}
1.{C_6}{H_5}MgBr\, \\
diethylether
\end{subarray} }Z$

${C_6}{H_6}\xrightarrow[{{\text{Conc}}{\text{. }}{{\text{H}}_2}{\text{S}}{{\text{O}}_4}}]{{{\text{Conc}}{\text{. HN}}{{\text{O}}_3}}}B\xrightarrow{{{\text{Sn + HCl}}}}C\xrightarrow[{O - {5\,^o}C}]{{{\text{HN}}{{\text{O}}_2}}}D\xrightarrow{{{\text{HB}}{{\text{F}}_4}}}E\xrightarrow{\Delta }F$

$F$ will be

Elements after atomic number $103$ have been discovered till now. If an element with atomic number $106$ were ever discovered which of the following electronic configuration will it possess

Which of following is phenolic

$C{H_3} - CH = C{H_2}\xrightarrow[{hv\,(low\,conc.)}]{{B{r_2}}}\xrightarrow[{Dry\,ether}]{{Mg}}\xrightarrow[{N{H_4}Cl}]{{\begin{array}{*{20}{c}}
O \\
{||} \\
{C{H_3} - C - C{H_3}}
\end{array}}}\xrightarrow[\Delta ]{{{H^ + }}}\mathop {(X)}\limits_{(major)} $

End product $(X)$ of the above reaction is

The charge required for the reduction of $1\,mol$ of $MnO_4^-$ to $MnO_2$ is ............ $\mathrm{F}$

Which of the following statements about galvanic cell is incorrect