Download App

p -Block elements - ll — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistryp -Block elements - ll1 Mark
MCQ
$PCl _{5}$ is well known. but $NCl _{5}$ is not. Because.
  • A
    nitrogen is less reactive than phosphorous.
  • ✓
    nitrogen doesn't have $d-$orbitals in its valence shell
  • C
    catenation tendency is weaker in nitrogen than phosphorous.
  • D
    size of phosphorous is larger than nitrogen.
✓

Answer

Correct option: B.
nitrogen doesn't have $d-$orbitals in its valence shell
b
$PCl _{5}$ forms five bonds by using the d-orbitals to "expand the octet". But $NCl _{5}$ does not exist because there are no $d$-orbitals in the valence shell $\left(2^{\text {nd }}\right.$ shell). Therefore there is no way to expand the octet.

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

Explore more

More "M.C.Q (1 Marks)" from p -Block elements - ll→p -Block elements - ll — all question types→Chemistry STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

The reactivity of $2-$ bromo $-2-$ methylbutane $(I),\, 1-$ bromopentane $(II)$ and $2$ bromopentane $(III)$ towards $S_N2$ displacement is such that :
→
Which will show maximum depression in freezing point when concentration is $0.1\,M$
→
Which of the following is not chelating agent?
→
${C_6}{H_5}CONHC{H_3}$ can be converted into ${C_6}{H_5}C{H_2}NHC{H_3}$ by
→
The complex cation which has two isomers is:
→
Comment on stereochemistry of products
→
The important reaction of aldehyde and ketone is:
→
Which is the correct statement about birth control pills?
→
Which of the following reagents, when heated with ethyl chloride, forms ethylene?
→
If $2\ gm$ of $\text{NaOH}$ is present is $200\ ml$ of its solution, its molarity will be:
→