Which metal is the least reactive?
- A$Zn$
- B$Fe$
- C$Mg$
- D$Au$
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Describe ionic compounds on the basis of the following properties:
$(i)$ Strong force of attraction between positive and negative ions:
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$(iii)$ Electrical conductivity.
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$(iii)$ Electrical conductivity.
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$X$ $Y$ $1.$ Dehydrating agent $p.$ Sulphur dioxide gas $2.$ In preparation of firecrackers $q.$ Concentrated sulphuric acid $3.$ Weak bleaching agent $r.$ Dihydrogen gas $4.$ Lightest gas $s.$ Sulphur
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