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G.K. Practice Test: Question Set - 06


1. The metal used to recover copper from a solution of copper sulphate is
    (A) Na
    (B) Ag
    (C) Hg
    (D) Fe

2. The main buffer system of the human blood is
    (A) H2CO3 - HCO3
    (B) H2CO3 - CO32-
    (C) CH3COOH - CH3COO-
    (D) NH2CONH2 - NH2CONH+

3. The octane number of zero is assigned to
    (A) 2-methyl octane
    (B) n-heptane
    (C) iso-octane
    (D) 3-methyl octane

4. The nuclear particles which are assumed to hold the nucleons together are
    (A) Electrons
    (B) Positrons
    (C) Neutrons
    (D) Mesons

5. The number of waves in n × 10th Bohr's orbit are
    (A) n2
    (B) n
    (C) n-2
    (D) n3

6. The gas used for artificial ripening of green fruit is
    (A) Ethylene
    (B) Ethane
    (C) Carbon dioxide
    (D) Acetylene

7. The number of g-molecule of oxygen in 6.02 × 1024 CO molecules is
    (A) 1 gram of molecule
    (B) 0.5 gram of molecule
    (C) 5 gram of molecule
    (D) 10 gram of molecule

8. The number of electrons presents in H+ is
    (A) Zero
    (B) One
    (C) Two
    (D) Three

9. The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
    (A) 4
    (B) 5
    (C) 2
    (D) 0

10. The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
    (A) Liquation
    (B) Leaching
    (C) Levigation
    (D) Magnetic separation

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