IIT-JEE Exam

Which of the following exists as covalent crystals
in the solid state ?
(1) Sulphur (2) Phosphorus
(3) Iodine (4) Silicon

Read Solution (Total 1)

Silicon exists as covalent solid,the others are molecular in nature.
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IIT-JEE Other Question

Which of the following complex species is not
expected to exhibit optical isomerism ?
(1) [Co(NH3)3Cl3] (2) [Co(en)(NH3)2Cl2]+
(3) [Co(en)3]3+ (4) [Co(en)2Cl2]+ A solution of (–) – 1 – chloro – 1 – phenylethane
in toluene racemises slowly in the presence of a
small amount of SbCl5, due to the formation of -
(1) carbocation (2) free radical
(3) carbanion (4) carbene