MCQ
Calculate atomic number of $A$ and $B$ respectively
- A$71, 72$
- B$58, 72$
- ✓$57, 72$
- D$57, 71$
✓
Answer
Correct option: C.
$57, 72$
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
The bond order is maximum in
A completely filled $d$ orbital $({d^{10}})$
→Which of the following formula does not correctly represent the bonding capacity of the atom involved
The structure and hybridisation of $Si{(C{H_3})_4}$ is
→Most stable carbocation is
The maximum number of stereoisomers that could exist for the compound below ?
The correct order of stability for the given canonical structures is
A $50\, watt$ bulb emits monochromatic red light of wavelength of $795\, \mathrm{~nm}$. The number of photons emitted per second by the bulb is $\mathrm{x} \times 10^{20}$. The value of $\mathrm{x}$ is ...... .
→$\left[\right.$ Given $: \mathrm{h}=6.63 \times 10^{-34} \,\mathrm{Js}$ and $\left.\mathrm{c}=3.0 \times 10^{8} \,\mathrm{~ms}^{-1}\right]$
Which of the following is a meso compound ?
Among the following marked proton of which compound shows lowest $pK _{ a }$ value?
→