Download NEET-UG 2013 Answer Key (Code - X) - Bansal Classes

Q.167 The molar specific heats of an ideal gas atconstant pressure and volume are denoted byAns. 1C Pand C V, respectively. If =CCPVand R isthe universal gas constant, then C Visequal to :(1)R( 1)(2)( 1)R1 (3) R (4)1 Q.168 The amount of heat energy required to raisethe temperature of 1 g of Helium at NTP, fromT 1K to T 2K is :Ans. 4(1) 23Na k B(T 2– T 1)(2) 43Na k B(T 2– T 1)3 T(3) Na k 4 B 2 T1(4) 83Na k B(T 2– T 1)Q.169 A plano convex lens fits exactly into a planoconcave lens. Their plane surfaces are parallelto each other. If lenses are made of differentmaterials of refractive indices µ 1and µ 2and Ris the radius of curvature of the curved surfaceof the lenses, then the focal length of thecombinationis:Ans. 2R(1)2(µ 1 µ 2)(2)(µ(3)2R(µ µ2 1)(4)Rµ1 2)R2(µ µ1 2)Q.170 During an adiabatic process, the pressure of agas is found to be proportional to the cube ofits temperature. The ratio ofis:Ans. 3(1) 2 (2) 35(3) 23(4) 34CCPVfor the gasQ.171 Awavetravellinginthe +vex-directionhavingdisplacement along y-direction as 1m,wavelength 2m and frequency of 1 Hz isrepresented by :(1) y = sin (2x – 2t)(2) y = sin (10x – 20t)(3) y = sin (2x + 2t)(4) y = sin (x – 2t)Ans. 4Q.172 The output (X) of the logic circuit shown infigurewillbe:AB(1) X A. B (2) X A. B(3) X A B (4) X A. BAns. 2Q.173 A body of mass 'm' is taken from the earth'ssurface to the height equal to twice the radius(R) ofthe earth. The changein potential energybodywill be :Ans. 1(1) 32 mgR (2) 3 mgR(3) 31 mgR (4) mg 2RX