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Melting point is the higher for
Options
(a) Ga
(b) B
(c) In
(d) Al
Correct Answer:
B
Explanation:
In the boron family the melting point decreases on moving down the group upto Ga. However it is not regular.The melting point of B,Al,Ga and In are 2300, 659,29.8 and 156.4⁰C, respectively.
The high melting point of boron is due to the fact that it exists as a giant covalent polymer in both solid and liquid state.
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Topics: S and Some P Block Elements
(157)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Hydrolysis of ester, in an acidic medium, is
- If uncertainty in position and momentum are equal, then uncertainty in velocity
- A substance with initial concentration of a mol dm⁻³ follows zero order kinetics.
- Chlorine dioxide is best prepared by passing dry
- The rapid change of pH near the stoichiometric point of an acid-base titration
Topics: S and Some P Block Elements (157)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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