MCQ
Time taken for an electron to complete one revolution in the Bohr orbit of hydrogen atom is
- ✓$\frac{{4{\pi ^2}m{r^2}}}{{nh}}$
- B$\frac{{nh}}{{4{\pi ^2}mr}}$
- C$\frac{{nh}}{{4{\pi ^2}m{r^2}}}$
- D$\frac{h}{{2\pi mr}}$
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Assertion $A$ : Thin layer chromatography is an adsorption chromatography.
Reason $R$: A thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent. In the light of the above statements, choose the correct answer from the options given below.
Given [Molar mass $(AB_2) = 360$ ]
$2CHI_3 + 6Ag \to 6AgI(s) + C_2H_2(g)$
$(A)$ $M$ and $N$ are non-mirror image stereoisomers
$(B)$ $M$ and $O$ are identical
$(C)$ $M$ and $P$ are enantiomers
$(D)$ $M$ and $Q$ are identical