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 […]
Aluminium oxide is not reduced by chemical reaction since
Options
(a) reducing agent contaminate (b) the process pollute the environment (c) aluminium oxide is highly stable (d) aluminium oxide is reactive
Correct Answer: […]
Pb + Conc.HNO₃ gives
Options
(a) Pb(NO₃)₂ + NO₂ (b) PbNO₃ + NO (c) Pb(NO₃)₄ + NO₃ (d) Pb(NO₃)₃ + N₂O
Correct Answer:
Pb(NO₃)₂ + NO₂
Explanation:
No explanation available. Be the first […]
The lusture of a metal is due to
Options
(a) its chemical inertness (b) its high polishing (c) its high density (d) presence of free electrons
Correct Answer:
presence of free electrons
Explanation: […]
Which of the following is true for diamond
Options
(a) diamond is a bad conductor of heat (b) diamond is a good conductor of electricity (c) diamond is made up of C,H and […]
2017-2025 Copyright Doctor Dreams Training Academy - About Us - Privacy Policy - Terms & Conditions - Contact Us - Refund Policy