1. Two spherical block bodies A and B are emitting radiations at same rate . The radius of B is doubled keeping radius of A fixed . The wavelength corresponding to maximum intensity becomes half for A , while it remains same for B . Then , the ratio of rate of radiation energy emitted by A and B is :
(a) 2
(b) 1/2
(c) 4
(c) 1/4
Answer: (c)
2. Amino acids are :
(a) Acidic
(b) Amphoteric
(c) Basic
(d) Neutral
Answer: amphoteric
3. Area bounded by the curve y = x^3 , the x axis and the ordinates x= -2 and x = 1 , is
(a) -9
(b) -15/14
(c) 15/14
(d) 17/4
Answer : (d)
4. Four point charges q , -q , Q and 2Q are placed in order at the corners A ,B , C and D of a square . If the field at the mid point of CD is Zero then the value of q/Q is :
(a) 1
(b) 5/√2
(c) 2√2/5
(d) 5√5/2
Answer : (d)
5. The linkage which holds various amino acid units in primary structures of proteins
(a) Glycoside linkage
(b) Peptide linkage
(c) Ionic linkage
(d) Hydrogen bond
Answer : (b)
6. Maltose on hydrolysis gives
(a) alpha -D- glucose
(b) alpha and beta -D- glucose
(c) Glucose and fructose
(d) Fructose only
Answer : alpha -D- glucose
7. 5 kg of ice at -10°C are added to 5 kg of water at 10°C . The temperature of resulting mixture is :
(a) 0°C
(b) -2°C
(c) 4°C
(d) 2°C
Answer : (a)
8. The area enclosed within the curve |x| + |y| = 1 is
(a) √2
(b) 2
(c) 2√2
(d) 4
Answer : (b)
9. The area between the curve y = 2x^4 - x^2 , the x axis and the ordinates of two minimum of the curve is
(a) 7/120
(b) 9/120
(c) 11/120
(d) None of these
Answer : (a)
10. At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is ......
(a) less than the rate of crystallization
(b) greater than the rate of crystallization
(c) equal to the rate of crystallization
(d) Zero
Answer : (c)
11. If x = a sin[ wt + π/6 ] and x' = a coswt , then what is the phase difference between the two waves ?
(a) π/3
(b) π/6
(c) π/2
(d) π
Answer: (a)
12. If the maximum speed of a particle on a travelling wave is Vo , then find the speed of a particle when the displacement is half of the maximum value .
(a) Vo/2
(b) √3Vo/4
(c) √3Vo/2
(d) Vo
Answer : (c)
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