General Knowledge MCQ - English
The main buffer system of the human blood is
H2CO3 - HCO3
H2CO3 - CO32-
CH3COOH - CH3COO-
NH2CONH2 - NH2CONH+
Answer : A
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1) The high reactivity of fluorine is due to
its high electro negativity
small size of fluorine atom
availability of d-orbitals
strong F - F bond
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2) The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
3) The maximum number of covalent formed by nitrogen is
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was used initially for making bottles of soda(carbonated drink)
is made using soda(sodium carbonate)
was initially used for storing sodium carbonate
is made using soda lime
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5) The metallurgical process in which a metal is obtained in a fused state is called
