Q26 of 400 Page 168

State one test by which sodium chloride can be distinguished from sugar.

sodium chloride when dissolved in water they conduct electricity through it but on the other hand sugar solution does not show any conductivity to electricity.

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25 Explain why:ionic compounds have generally high melting points. 26 Give two general properties of ionic compounds and two those of covalent compounds. 27 Explain why, ionic compounds conduct electricity in solution whereas covalent compounds do not conduct electricity. 27 Which of the following will conduct electricity and which not?

MgCl2, CCl4, NaCl, CS2, Na2S Give reasons for your choice.