B. Pharma Questions Paper
1. In solid ice, oxygen atom is surrounded:
(a) tetrahedrally by 4 hydrogen atoms
(b) octahedrally by 2 oxygen and 4 hydrogen atoms
(c) tetrahedrally by 2 hydrogen and 2 oxygen atoms
(d) octahedrally by 6 hydrogen atoms
Ans. (a)
2. The paramagnetic species is:
(a) KO2
(b) SiO2
(c) TiO2
(d) BaO2
Ans. (a)
3. A solid compound ‘X’ on heating gives CO2 gas and a residue. The residue mixed with water forms ‘Y’. On passing an excess of CO2 through ‘Y’ in water, a clear solution ‘Z’ is obtained. On boiling ‘Z’ compound ‘X’ is reformed. The compound ‘X’ is
(a) Ca(HCO3)2
(b) CaCO3
(c) Na2CO3
(d) K2CO3
Ans. (b)
4. The wrong statement about fullerence is
(a) It has 5-membered Carbon ring
(b) It has 6-membered Carbon ring
(c) It has sp2 hybridization
(d) It has 5-membered rings more than 6-membered rings
Ans. (d)
5. The chemical composition of cryolite mineral is
(a) Al2O3
(b) Al2O3 . 12 H2O
(c) KAISi3O8
(d) Na3AIF6
Ans. (d)
6. Wurtz reaction is best used for making:
(a) Unbranched alkanes
(b) Symmetrical alkanes
(c) Unsymmetrical alkanes
(d) n - alkanes with odd number of carbons
Ans. (b)
7. Which of the following gases is not a green house gas?
(a) CO
(b) O3
(c) CH4
(d) H2O vapour
Ans. (a)
8. The edge length of face centered unit cubic cell is 508 pm. The radius of the atom will be
(a) 179.6 pm
(b) 288 pm
(c) 618 pm
(d) 398 pm
Ans. (a)
9. The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water is (K𝑓 = 1.86 K Molality-1)
(a) -1.860C
(b) – 3.720C
(c) +1.860C
(d) +3.720C
Ans. (b)
10. While charging the lead storage battery
(a) PbSO4 anode is reduced to Pb
(b) PbSO4 cathode is reduced to Pb
(c) PbSO4 cathode is oxidized to PbO2
(d) PbSO4 anode is oxidized to PbO2
Ans. (a)
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