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CBSE

Subject

Chemistry

NEET 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

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

42. ભૂંજન ઘટના કયા પ્રકારની ખનિજો માટે જરૂરી હોય છે ?

ઑક્સાઈડ ખનિજો
સિલિકેટ ખનિજો
કાર્બોનેટ ખનિજો
સલ્ફાઈડ ખનિજો

43. ધાતુ ઑક્સાઈડમાંથી ધાતુ મેળૅવવા કયા રિડક્શનકર્તાનો ઉપયોગ કરવામાં આવે છે ?

કાર્બનમૉઑસાઈડ
કાર્બન
સિલિકોન
A અને B

44. નીચેની કઈ પ્રક્રિયા ઈલેક્ટ્રૉનેશન કહે છે ?

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