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Multiple choice question

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Silicons are–<br />

(a) Synthesised resins of Si and C (b) Compounds of petrolium<br />

(c) Carbo silicon (d) None of these<br />

8 dkcksZjaMe dk lw= gksrk gS&<br />

(a) B 4 C (b) SiC (c) Al 3 C 4 (d) CaC 2<br />

Formula for carborundum is–<br />

(a) B 4 C (b) SiC (c) Al 3 C 4 (d) CaC 2<br />

9 'kq"d cQZ dgrs gSa&<br />

(a) SOCl 2 dks (b) 'kq"d SO 2 dks<br />

(c) 'kq"d ,oa Bksl CO 2<br />

Dry ice is called–<br />

(a) SOCl 2<br />

(c) Dry & Solid CO 2<br />

10 fo|qr dk lcls vPNk dqpkyd gS&<br />

76<br />

(d) COCl 2 dks<br />

(b) Dry SO 2<br />

(d) COCl 2<br />

(a) K (b) xzsQkbV (c) ghjk (d) rkack<br />

Best insulator for electricity is–<br />

(a) K (b) Graphite (c) Diamond (d) Copper<br />

11 Ni(CO) 4 prq"Qydh; gksrk gS blfy;s Fe(CO) 5 gksxk&<br />

(a) iap Qydh; (b) v"V Qydh; (c) oxkZdkj (d) fijkfeMh<br />

Ni(CO) 4 is tetrahedral hence Fe(CO) 5 should be–<br />

(a) Penta hedral (b) Octahedral (c) Square (d) Pyramidy<br />

12 dkcZu lc vkWDlkbM dk lw= gS&<br />

Formula for carbon suboxide is–<br />

(a) C 3 O 2 (b) C 2 O 2 (c) CO 2 (d) CO

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