MCQ
$\,$
- A
- B
- ✓
- D
✓
Answer
Correct option: C.
c
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Liquid $'M\ ’$ and liquid $'N\ ’$ form an ideal solution. The vapour pressures of pure liquids $'M\ ’$ and $'N\ ’$ are $450$ and $700\,\ce{mm\ Hg,}$ respectively at the same temperature. Then correct statement is$: ( x_M =$ mole fraction of $'M\ ’$ in solution $;x_N =$ mole fraction of $'N\ ’$ in solution$; y_M =$ mole fraction of $'M\ ’$ in vapour phase; $y_N =$ mole fraction of $'M\ ’$ in vapour phase$)$
→Which of the following element has maximum density
Which of the following point never be same for $IP$ and $EA$
→phenol $\xrightarrow[\Delta ]{{{H^ \oplus }}}X\,\xrightarrow[{(2)\,\,{H_2}O/Zn}]{{(1)\,\,{O_3}}}Y\,;$ $Y$ is
→Consider the data given below for hypothetical reaction $A \to X$
→$Time (sec)$ Rate $(mol\, L^{-1} sec.^{-1})$
$0$ $1.60 \times 10^{-2}$
$10$ $1.60 \times 10^{-2}$
$20$ $1.60 \times 10^{-2}$
$30$ $1.60 \times 10^{-2}$
From the above data, the order of reaction is
Identify the correct statement regarding entropy
Which one of the following statements for $D.I.$ Mendeleeff, is incorrect?
→Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is: (Given $v =$ frequency of $X$-ray emitted; $Z =$ atomic number)
→Match each of the diatomic molecules in Column $I$ with its property $/$ properties in Column $II$.
→| Column $I$ | Column $II$ |
| $(A)$ $\mathrm{B}_2$ | $(p)$ Paramagnetic |
| $(B)$ $\mathrm{N}_2$ | $(q)$ Undergoes oxidation |
| $(C)$ $\mathrm{O}_2^{-}$ | $(r)$ Undergoes reduction |
| $(D)$ $\mathrm{O}_2$ | $(s)$ Bond order $\geq 2$ |
| $(t)$ Mixing of $'\mathrm{s}\ '$ and $'\mathrm{p}\ '$ orbitals |
The order of the magnitude of first ionisation potentials of $Be, B, N$ and $O$ is
→