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Subject

Chemistry

Gujarati JEE Chemistry : તત્વના અલગીકરણ માટેના સામાન્ય સિદ્વાંતો અને પદ્વતિઓ

Multiple Choice Questions

41. નીચેની કઈ પ્રક્રિયા કૅલ્શિનેશનની છે ?

$2 CuS subscript left parenthesis straight S right parenthesis end subscript space plus space 3 straight O subscript 2 left parenthesis straight g right parenthesis end subscript space rightwards arrow space 2 Cu subscript 2 straight O subscript left parenthesis straight s right parenthesis end subscript space plus space 2 SO subscript 2 left parenthesis straight g right parenthesis end subscript$
$2 ZnS subscript left parenthesis straight S right parenthesis end subscript space plus space 3 straight C subscript left parenthesis straight s right parenthesis end subscript space rightwards arrow space 4 Al subscript left parenthesis straight S right parenthesis end subscript space plus space 3 CO subscript 2 left parenthesis straight g right parenthesis end subscript$
$ZnCO subscript 3 left parenthesis straight S right parenthesis end subscript space rightwards arrow space ZnO subscript left parenthesis straight S right parenthesis end subscript space plus space CO subscript 2 left parenthesis straight g right parenthesis end subscript$
આપેલ પૈકી એક પણ નહી

42. ખનીજમાંથી ધાતુ મેળવવા માટેની સૌથી સામાન્ય રીતે કઈ છે ?

હાઈડ્રૉજન વડે રિડક્શન કરીને
કાર્બન વડે રિડક્શન કરીને
ઍલ્યુમિનિયમ વડે રિડક્શન કરીને
વિદ્યુતવિભાજિત પદ્ધતિ દ્વારા

43. નીચેની કઈ પ્રક્રિયા ઈલેક્ટ્રૉનેશન કહે છે ?

$FeO subscript left parenthesis straight s right parenthesis end subscript space plus space straight C subscript left parenthesis straight s right parenthesis end subscript space rightwards arrow space Fe subscript left parenthesis straight s right parenthesis end subscript space plus space CO subscript left parenthesis straight g right parenthesis end subscript$
$FeO subscript left parenthesis straight s right parenthesis end subscript space plus space CO subscript left parenthesis straight s right parenthesis end subscript space rightwards arrow space Fe subscript left parenthesis straight s right parenthesis end subscript space plus space CO subscript 2 left parenthesis straight g right parenthesis end subscript$
$2 Al subscript 2 straight O subscript 3 left parenthesis straight s right parenthesis end subscript space plus space 3 straight C subscript left parenthesis straight s right parenthesis end subscript space rightwards arrow space 4 Al subscript left parenthesis straight s right parenthesis end subscript space plus space 3 CO subscript 2 left parenthesis straight g right parenthesis end subscript$
$Fe subscript 2 straight O subscript 3 left parenthesis straight s right parenthesis end subscript space plus space CO subscript left parenthesis straight g right parenthesis end subscript space rightwards arrow space 2 FeO subscript left parenthesis straight s right parenthesis end subscript space plus space CO subscript 2 left parenthesis straight g right parenthesis end subscript$