MCQ
The outer electronic configuration of $Gd \ (At. \ No. \ 64)$ is
- A$4f^5 \ 5d^4 \ 6s^1$
- ✓$4f^7 \ 5d^1 \ 6s^2$
- C$4f^3 \ 5d^5 \ 6s^2$
- D$4f^4 \ 5d^5 \ 6s^1$
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| $List-I$ | $List-II$ |
| $A.$ Benzenesulphonyl chloride | $I.$ Test for primary amines |
| $B.$ Hoffmann bromamide reaction | $II.$ Anti Saytzeff |
| $C.$ Carbylamine reaction | $III.$ Hinsberg reagent |
| $D.$ Hoffmann orientation | $IV.$ Known reaction of Isocyanates. |
Choose the correct answer from the options given below.
The rate constants of the above reaction at $200 \,K$ and $300 \,K$ are $0.03 \,min ^{-1}$ and $0.05 \,min ^{-1}$ respectively. The activation energy for the reaction is $....J$ (Nearest integer)
(Given : In $10=2.3$
$R =8.3\,J\,K ^{-1}\, mol ^{-1}$
$\log 5=0.70$
$\log 3=0.48$
$\log 2=0.30$
$(b)\, NaOH$ in $20\, gm$ will be respectively.
$(A)$ Micelle formation is an exothermic process.
$(B)$ Micelle formation is an endothermic process.
$(C)$ The entropy change is positive.
$(D)$ The entropy change is negative.