In the process of nitration, the electrophile formed is
Options
(a) NO₂⁺ (b) NO₃⁻ (c) NO₂⁻ (d) NO⁺
Correct Answer:
NO₂⁺
Explanation:
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Copper pyrite, the chief ore of copper, is
Options
(a) CuFeS₂ (b) Cu₂S (c) CuCO₃.Cu(OH)₂ (d) Cu₂O
Correct Answer:
CuFeS₂
Explanation:
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Copper metal crystallizes with a face centred cubic (fcc) lattice .It has a coordination number of
Options
(a) 4 (b) 1 (c) 12 (d) 2
Correct Answer:
12
Explanation:
Every particle in a […]
The golden age of Dinosaurs was during which of the following era?
Options
(a) mesozoic (b) archaeozoic (c) palaeozoic (d) coenozoic
Correct Answer:
mesozoic
Explanation:
No explanation available. Be the first to write […]
Pollen Basket is
Options
(a) a basket made of pollen (b) a simple basket (c) sac in flowers where pollen are carried (d) cavity in hind leg of a worker bee
Correct Answer:
cavity […]
The fuel wood crisis can be overcome by
Options
(a) efficient wood extractions (b) better wood stores (c) using solar energy (d) greater afforestation
Correct Answer:
using solar energy
Explanation:
Nearly two billion people […]
Bilirubin and biliverdin are
Options
(a) vitamins (b) enzymes (c) bile pigments (d) bile salts
Correct Answer:
bile pigments
Explanation:
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When primary alcohol is oxidised with chlorine, it gives
Options
(a) CCl₃CHO (b) Cl₃CHO (c) CH₃COCH₃ (d) CH₃CHO
Correct Answer:
CCl₃CHO
Explanation:
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Which of the following compounds is efflorescent?
Options
(a) Na₂CO₃ 10H₂O (b) Na₂CO₃ (c) Na₂CO₃ H₂O (d) NaHCO₃
Correct Answer:
Na₂CO₃ 10H₂O
Explanation:
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Nitrogen is obtained by the thermal decomposition of
Options
(a) NH₄NO₃ (b) Pb(NO₃)₂ (c) NH₄NO₂ (d) AgNO₃
Correct Answer:
NH₄NO₂
Explanation:
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