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1). What is the melting point …

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1). What is the melting point of NaCl? 2). Which is more melting point or boiling point of MgCl2? 3). Give any two properties of ionic compounds? 4). Why is sodium kept in kerosene oil? Give reason? 5). Give one example of metal which is liquid in room temperature?

Posted by Harshal Joshi 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Khushi 4 years, 11 months ago

(1) 1074K. (2) boiling point is more than melting point of MgCl2. (3) ① Ionic compounds are solid and are somewhat hard because of the strong force of attraction between the positive and negative ions. ② Ionic compounds have high melting and boiling points. (4) Sodium is highly reactive metal and reacts vigorously with the oxygen, carbon dioxide and moisture present in the air such that it may even cause fire. To prevent the explosive reaction, sodium is kept in kerosene oil. (5) Mercury is liquid at room temperature.

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