Carbon and silicon belong to (IV) group. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6.This is due to
Options
(a) availability of low […]
The wrong statement about fullerene is
Options
(a) it has 5-membered carbon ring (b) it has 6-membered carbon ring (c) it has sp² hybridization (d) it has 5-membered rings more than 6-membered rings
Incorrect statement about Ge is
Options
(a) GeO₂ is weakly amphoteric (b) Ge(OH)₂ is amphoteric (c) GeCl₂ is more stable than GeCl₄ (d) Ge – Ge bond energy is lesser than that of […]
The incorrect statement among the following is
Options
(a) C₆₀ is an allotropic form of carbon (b) O₃ is an allotropic form of oxygen (c) S₈ is only allotropic form of sulphur (d) […]
In diborane the two H-B-H angles are nearly
Options
(a) 60⁰,120⁰ (b) 95⁰,120⁰ (c) 95⁰,150⁰ (d) 120⁰,180⁰
Correct Answer:
95⁰,120⁰
Explanation:
No explanation available. Be the first to write the explanation for this […]
Hardest compound of boron is
Options
(a) Magnesium boride (b) aluminium boride (c) boron nitride (d) boron carbide
Correct Answer:
boron carbide
Explanation:
Boron carbide is written as B₃C.It is produced by reducing […]
Which of the following is the least stable and its existence is doubtful
Options
(a) SnI₄ (b) CI₄ (c) PbI₄ (d) GeI₄
Correct Answer:
PbI₄
Explanation:
Non-existence of pbI₄ can be explained on […]
Which of the following glasses is the most heat resistant?
Options
(a) Bottle glass (b) Flint glass (c) Water glass (d) Pyrex glass
Correct Answer:
Pyrex glass
Explanation:
No explanation available. Be the […]
Which of the following shows bond in silicone?
Options
(a) Si – C – Si – C – Si (b) Si – Si – Si – Si (c) Si – O – Si […]
Aluminium deposited vapours on glass forms a good mirror essentially because
Options
(a) it has better shine than Ag (b) it does not scratch (c) coating is much more smoother (d) it does […]
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