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Q153) Calcium does not combine directly with ...




SOLUTION


Answer: (a)


Q154) Anhydrous stanus chloride can be prepared by




SOLUTION


Answer: (d)


Q155) Pb and and Sn are extracted for there chief ores by [ IIT 2004 screening]



SOLUTION

Tin can be extracted by carbon reduction method while lead can be extracted by self and carbon extraction method
SnO2 + C → Sn + CO2
PbO + 2PbS → 3PbO + SO2
Answer:(b)



Q156) C(OH)4 is unstable here as Si(OH)4 is stable because



SOLUTION


Answer: (a)


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