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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
- Which of the following is not correct for D₂O
- A bromoalkane contains 35% carbon and 6.57% hydrogen by mass. Calculate the empirical
- When 25g of Na₂SO₄ is dissolved in 10³ kg of solution,its concentration will be
- On electrolysis of dilute H₂SO₄ using plantinum electrodes , the gas evolved at
- At what temperature, the rms velocity of gas shown at 50⁰C will be doubled
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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