The exchange of oxygen between blood and air takes place in the _______?
B. Lungs
C. Heart
D. All of these
Correct Answer: B. Lungs
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B. Lungs
C. Heart
D. All of these
A. Ganges Delta
B. Mississippi Delta
C. Amazon Delta
D. Niger Delta
A. Internal structural changes in matter
B. Composition of matter
C. Properties of matter
D. Composition and properties of matter
A. it has 20 mol of hydrogen atoms
B. it has 30 mol of oxygen atoms
C. it has 80 mol of atoms
D. 30 mol of hydrogen atoms
A. they are isotopes
B. compounds of both with CI2 will be similar in reactivity towards other
compounds
C. both have same colors
D. both have same melting points
A. there may be a possibility of a chemical reaction
B. lemon juice is dangerous to health
C. lemon juice is dangerous to health
D. water should be preferred over lemon juice for drinking
A. gram
B. kilogram
C. microgram
D. gram/lit