Important Question B. Pharma

1. by metal mass moving in a magnetic field is due to
(a) Alternating current
(b) Eddy current
(c) Magnetic field
(d) Alternating potential produced in metallic mass
Ans. (b)
2. The value of current at resonance in a series LCR circuit is affected by the value of
(a) R only                     
(b) C only
(c) L only                     
(d) L, C and R
Ans. (a)
3. In which of the following regions of electromagnetic spectrum will the vibrational motion of molecules give rise to absorption?
(a) Ultraviolet                
(b) Microwave
(c) Infrared                   
(d) Radio waves
Ans. (b)
4. If the refracting angle of a prism is 60  and the minimum deviation 30 , the angle of incidence will be
(a) 30                           
(b) 45
(c) 60                           
(d) 90
Ans. (b)
5. The impurity concentration in a normal diode is equal to
(a) 1 in 109 parts           
(b) 1 in 106 parts
(c) 1 in 103 parts           
(d) 1 in 102 parts
Ans. (b)
6. The total numbers of protons in 10.0 g of CaCO3 is
(a) 1.5057 x 1024                        
(b) 2.0478 x 1024
(c) 3.0115 x 1024                        
(d) 4.0956 x 1024
Ans. (c)
7. Which of the following sets of quantum numbers are correct?
(a) 𝑛 = 1, 𝑙 = 1 , 𝑚 = +2
(b) 𝑛 = 2, 𝑙 = 2, 𝑚 = +1  
(c) 𝑛 = 3, 𝑙 = 2, 𝑚 = -2   
(d) 𝑛 = 3, 𝑙 = 4, 𝑚 = -2   
Ans. (c)
8. Among halogens the correct order of electron gain enthalpy is:
(a) F > Cl > Br > I
(b) F > Cl < Br < I
(c) F < Cl < Br > I
(d) F < Cl > Br > I
Ans. (d)
9. The hybrid states of central atom in diborane, diamond and graphite are respectively:
(a) sp2, sp3, sp2
(b) sp3, sp3, sp2
(c) sp3, sp3, sp3
(d) sp, sp2, sp2
Ans. (b)
10. Which pair of the gaseous diffuse through a small jet with same rate of diffusion at same P and T?
(a) NO, CO                   
(b) NO, CO2
(c) NH3, PH3                 
(D) NO, C2H6
Ans. (d)
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