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12 September, 18:23

A solid crystal of NH3 is Question 24 options: soft, low melting, a poor electrical conductor. soft, low melting, a good electrical conductor. hard, high melting, a good electrical conductor. hard, high melting, a poor electrical conductor. soft, high melting, a poor electrical conductor.

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  1. 12 September, 19:32
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    soft, low melting, a poor electrical conductor

    Explanation:

    In a solid crystal of NH3; there exist a covalent bonding in between the Nitrogen and the hydrogen atoms. Thus the NH3 solid crystal is soft due as a result of covalent bonding. Covalent bonds are formed between two or more atoms having zero or very small electronegativity difference.

    However in a covalent bond, a low temperature of heat is sufficient in melting solid crystals of NH3.

    SImilarly, in NH3, the crystal structures, the crystal lattice of NH3 are fixed. Hence, the remain a poor conductor of electricity as they partially dissociate into ions in water.

    Thus; A solid crystal of NH3 is soft, have a low melting and a poor electrical conductor.
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