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Match the species given in Column I with properties given in Column II.

Column I

Column II

(i) Diborane

(a) Used as a flux for soldering metals

(ii) Gallium

(b) Crystalline form of silica

(iii) Borax

(c) Banana bonds

(iv) Aluminosilicate

(d) Low melting, high boiling, useful for measuring high temperatures

(v) Quartz

(e) Used as catalyst in petrochemical industries

Answers (1)

(i → c);

BH₃ is not stable, has $sp^{3}$ hybridization and shows banana bonds, and forms diborane $B_{2}H_{6}$ by 3 centres -2 electron bonds

(ii → d)

Gallium has a different structure as it can exist in the liquid state for high ranges of temperature and the low melting point and high boiling point make it flexible to be used in fluctuating temperature.

(iii → a);

Borax is used as a flux for soldering metals and coating as it has a high melting point and can sustain heat.

(iv → e);

Aluminosilicates also contain zeolites and widely used as a catalyst in petrochemical industries.

(v → b)

Silica crystallizes to form Quartz.

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