MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic Chemistrys- Block 3.0Alkali metals
Which of the following statement (s) is/are correct regarding alkali metal halides? I. They possess high melting point and are crystalline in nature. II. They are prepared by reaction of appropriate oxides with aqueous hydrohalic acid. III. They are prepared by reaction of carbonates with aqueous hydrohalic acid IV. They have high negative enthalpy of formation.
A.I and II are true
B.I, II and are true
C.II, III and IV are true
D.All the above are true✓ Correct
Explanation
All alkali metal halides are crystalline, high melting point, colourless solid. They can be prepared by the reaction of the oxide. Hydroxide or carbonates with aqueous hydrohalic acid (HX). All of these have high negative value of enthalpy of formation.
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