MCQ
$x$ is 

  • B

  • C

  • D

Answer

Correct option: A.

a

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

Similar questions

For the Balmer series in the spectrum of $\mathrm{H}$ atom, $\quad \bar{v}=R_{H}\left\{\frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}}\right\}, \quad$ the correct statements among $(I)$ to $(IV)$ are

$(I)$ As wavelength decreases, the lines in the series converge

$(II)$ The integer $n_{1}$ is equal to $2$

$(III)$ The lines of longest wavelength corresponds to $\mathrm{n}_{2}=3$

$(IV)$ The ionization energy of hydrogen can be calculated from wave number of these lines

Which of the following can exhibit cis-trans isomerism
$Ca{C_2} + {H_2}O \to A\xrightarrow{{{H_2}S{O_4}/HgS{O_4}}}B$  Identify $A$ and $B$ in the given reaction
For the reaction ${H_2}_{(g)} + {I_2}_{(g)}$ $\rightleftharpoons$ $2HI_{(g)}$, the equilibrium constant changes with
Identify the position where electrophilic aromatic substitution $(EAS)$ is most  favourable.
The frequency of yellow light having wavelength $600$ $nm$ is
The heat of combustion of solid benzoic acid at constant volume is $-321.30 \mathrm{~kJ}$ at $27^{\circ} \mathrm{C}$. The heat of combustion at constant pressure is $(-321.30-x R)$ $\mathrm{kJ}$, the value of $\mathrm{x}$ is . . . . . . .
The gas absorbs $100\, J$ and is simultaneously compressed by a constant external pressure of $1.50\, atm$ from $8\, lit$ to $2\, lit$ volume. Hence $\Delta U$ will be.....$J$
Given below are two statements:

Statement $I$ : The decrease in first ionization enthalpy from $B$ to $Al$ is much larger than that from $Al$ to $Ga$.

Statement $II$ : The d orbitals in Ga are completely filled.

In the light of the above statements, choose the most appropriate answer from the options given below

Which one of the following groupings represents a collection of isoelectronic species