Question

please solve these questions...
but not directly with calculation and explanation....

please... ​

Answer 1

$\large\bf{\underline{\underline{Required\:Answers:-}}}$

a] Valency of Flourine in CaF₂ is -1

Valency of Flourine in CaF₂ is -1 .

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b] Valency of Sulphur in SF₆ is +6

In SF₆ Sulphur Combines with 6 Flourine atoms . So the Valency of Sulphur in SF₆ is +6

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c] Valency of Phosphurus in PH₃ is +3

In PH₃ Phosphurus combines with three Hydrogen atoms so the valency of phosphurus is +3

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d] Valency of Carbon in CH₄ is +4

In CH₄ Carbon combines with 4 Hydrogen atoms . So the valency of Carbon in CH₄ is +4

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e] (i) Valency of Nitrogen in N₂O₃ is +3

Reason : Let the valency of N in N₂O₃ be 'a' . We know that valency of oxygen is -2

⇒ 2(a) + 3(-2) = 0 ⇒ 2a = 6 ⇒ a = 3

(ii) Valency of Nitrogen in N₂O₅ is +5

Reason : Let the valency of N in N₂O₅ be 'a' . We know that valency of oxygen is -2

⇒ 2(a) + 5(-2) = 0 ⇒ 2a = 10 ⇒ a = +5

(iii) Valency of Nitrogen in NO₂ is +4

Reason : Let the valency of Nitrogen be 'a' and we knoe the valency of oxygen is -2

⇒ a + 2(-2) = 0 ⇒ a = +4

(iv) Valency of Nitrogen in NO is +2

Reason : Let the valency of N in NO be 'a' . We know that valency of oxygen is -2

⇒ a + (-2) = 0 ⇒ a = 2 ✓

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f] Valency of Manganese in MnO₂ is +4

Reason : Let the valency of Mn in MnO₂ be 'a' . We knoe that valency of oxygen is -2 . As net charge is equal to zero ,

⇒ a + 2(-2) = 0 ⇒ a = +4

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g] Valency of Copper in Cu₂O is +1

Reason : Let the valency of Cu in Cu₂O be 'a' . We know that valency of oxygen is -2 . As net charge is zero ,

⇒ 2(a) + (-2) = 0 ⇒ 2a = 2 ⇒ a = +1

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h] Valency of Magnesium in Mg₃N₂ is +2