Question with Answer B. Pharma

1. Which of the following gases is not a green house gas?
(a) CO                         
(b) O3
(c) CH4                         
(d) H2O vapour
Ans. (a)
2. 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)
3. 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)
4. 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)
5. which of the following is a unit of zero order reaction?
(a) mol L-1 S-1                
(b) L mol-1 S-1
(c) L-1 mol-1 S-1                 
(d) L mol S
Ans. (a)
6. The colloidal solution of gelatin is known as
(a) Solvent loving
(b) Reversible
(c) Hydrophilic
(d) All of the above
Ans. (d)
7. Flux used in the metallurgy of iron is
(a) SiO2                        
(b) CaCo3
(c) Felspar                   
(d) Flit
Ans. (b)
8. Which of the following acids forms three series of Salts?
(a) H3PO2                                
(b) H3BO3
(c) H3PO4                     
(d) H3PO3
Ans. (c)
9. Oxygen molecules shows:
(a) Diamagnetism         
(b) Paramagnetism
(b) Ferromagnetism      
(d) Ferrimagnetism
Ans. (b)
10. Identify the molecular formula of tear gas:
(a) COCl2                      
(b) CCl3NO2
(c) CCl3CHO                 
(d) None of the above
Ans. (b)
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