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Valency

Assertion A: ...

Question

Assertion (A): Sodium ion has valency one.
Reason (R): Sodium ion combines with one anion.

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Solution

The correct answer is option (a).

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Q. (a) What is the difference between a cation and an anion ? Explain with examples.
(b) The valencies (or charges) of some of the ions are given below :

Ion	Valency (Charge)	Ion	Valency (Charge)
Sodium ion	1+	Nitrate ion	1–
Copper ion	2+	Sulphide ion	2–

Using this information, write down the formulae of :
(i) Sodium sulphide
(ii) Copper nitrate

Q. Assertion: Sodium Metal is reactive where as Sodium Ions aren't reactive.

Reason: Sodium Metal has an electronic configuration of 2, 8, 1. Sodium Ions have a configuration of 2, 8.

Q. Assertion :The mobility of sodium ion is lower than that of potassium ion. Reason: The ionic mobilities depend on the effective radius of the ion.

Q. When sodium gives one electron to chlorine then which ion will sodium has positive or negative ion?

Q. 16.assertion- the mobility of sodium ion is lower than that of pottasium ion reason -the ionic mobilities depends upon on the effective radius of ion

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