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Important questions on Group 16 Elements

The proof of oxidizing action of hydrogen peroxide in acid solution is in the formation of

A
B
C
both and
D
both and
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Formation of is ________, whereas formation of is __________.

A
exothermic, endothermic
B
endothermic, exothermic
C
endothermic, endothermic
D
exothermic, exothermic
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________ bacteria are microbes that work in the absence of oxygen.

A
Anaerobic
B
Aerobic
C
Gram-positive 
D
Gram-negative
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