Q. 'Nathra-Ka-Pal' is having deposits of which of following metal ?
1) Lead
2) Tungsten
3) Iron
4) Copper
Q. Liquid water is denser than ice due to -
1) higher surface tension
2) hydrogen bonding
3) van der Waals forces
4) covalent bondig
Q. Which one of the following is the chemical name of heavy water ?
1) Hydrogen oxide
2) Deuterium dioxide
3) Deuterium oxide
4) Heavy hydrogen oxide
Q. Who among the following has coined the term 'Quark', the fundamental particles that make up protons and neutrons in an atomic nucleus ?
1) Richard Feynman
2) Murray Gell-Mann
3) Albert Einstein
4) Niels Bohr
Q. The mass number of an element is NOT changed when it emits -
1) Alpha and Beta radiations only
2) Alpha and Gamma radiations only
3) Beta and Gamma Radiations only
4) Alpha, Beta and Gamma radiations
Q. What is the chemical formula for Sodium Chloride (Salt) ?
1) NaC12
2) NaCl
3) Na2C1
4) Na2C
Q. The main component of green-house gases is -
1) carbon dioxide
2) methane
3) nitrous oxide
4) None of the above/More than one of the above
Q. Which of the following elements does not contain neutrons ?
1) Oxygen
2) Nitrogen
3) Hydrogen
4) Copper
Q. Which of the following has pH Value 7 ?
1) Pure water
2) Neutral solution
3) Basic solution
4) None of the above/More than one of the above
Q. On the basis of biomagnification factor (L/kg), the increasing order of which chemicals are correct ?
1) Benzene < Chloroform < DDT < Chlorodane
2) Chloroform < Benzene < Chlorodane < DDT
3) Chloroform < Benzene < DDT < Chlorodane
4) Chloroform < Chlorodane < Benzene < DDT
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