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Potassium Dichromate

The actual fo...

Question

The actual formula of sodium chloride is:

A

N a C l

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B

N a^{+} C l^{-}

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C

(N a^{+} C l^{-})_{n}

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D

N a_{n} C l_{n}

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Solution

The correct option is C $(N a^{+} C l^{-})_{n}$
Sodium chloride has no molecular formula and only empirical formula because sodium chloride is not a molecule.
Like all salts, sodium chloride is made of a regular arrangement of anions and cations one next to another. There is no limit to how big this salt can be and there is no clear "end" to the lattice. Thus sodium chloride is not a molecule. We can have the empirical formula -1:1 ratio of the different elements. For every sodium ion there is a chloride ion. So the empirical formula for sodium chloride is $(N a^{+} C l^{-}) n$ .

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Q. Assertion: If

λ_{N a^{+}}^{\circ} + λ_{C l^{-}}^{\circ}

are molar limiting conductivity of the sodium and chloride ions respectively, then the limiting molar conducting for sodium chloride is given by the equation:

λ_{N a C l}^{\circ} = λ_{N a^{+}}^{\circ} + λ_{C l^{-}}^{\circ}

Reason:This is according to Kohlrausch law of independent migration of ions.

N a^{+}

C l^{-}

ions in sodium chloride is depicted by the given figure. Choose the correct option regarding formula mass of sodium chloride.

N a + C l \to N a^{+} + C l^{-} \to N a^{+} C l^{-}

(2,8,1) (2,8,7) (2,8) (2,8,8)
The above equation represents the formation of sodium chloride. Observe the equation and answer the following:
a) How many electrons are transferred from

N a

C l

?
b) Name the force acting between

N a^{+}

C l^{-}

.
c) Name the nearest noble gas to

C l^{-}

.
d) Name the bond between

N a^{+}

C l^{-}

.
e) How many electrons are present in

N a^{+}

Q. Sodium chloride has a crystalline structure made up of

N a^{+}

C l^{-}

N a C l

not conduct electricity in solid state?

In 2Na_(S) + Cl₂ → 2 NaCl_(S) ; The oxidising agent is

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