Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Open MARKS Web Download App
Search any question & find its solution
Question: Answered & Verified by Expert
Which one of the following statements is not correct?
Chemistryp Block Elements (Group 13 & 14)AP EAMCETAP EAMCET 2017 (26 Apr Shift 1)
Options:
  • A In $\mathrm{CO}_2$ molecule, carbon hybridisation is $s p$.
  • B Fullerenes are made by heating graphite in an electric arc in the presence of argon gas.
  • C Both $\left[\mathrm{SiF}_6\right]^{2-}$ and $\left[\mathrm{SiCl}_6\right]^{2-}$ ions are known.
  • D In CO molecule, there are one 'sigma' $(\sigma)$ and two "pi" $(\pi)$ bonds.
Solution:
1736 Upvotes Verified Answer
The correct answer is: Both $\left[\mathrm{SiF}_6\right]^{2-}$ and $\left[\mathrm{SiCl}_6\right]^{2-}$ ions are known.
$\left[\mathrm{SiF}_6\right]^{2-}$ is known to exist but due to large size of chlorine $(\mathrm{Cl})$ atom, $\left[\mathrm{SiCl}_6\right]^{2-}$ ions can not known.

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.

Use on iOS or Desktop Download from Google Play