Specimen copy of Resonance Distance Learning program for KVPY SA Stream. Visit @ www.edushoppee.com to purchase.Full description
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Analysis of last three years papers of Stream SA of KVPY examination
INTERVIEW QUESTIONS
Specimen copy of Resonance Distance Learning program for KVPY SA Stream. Visit @ www.edushoppee.resonance.ac.in to purchase.
This is the book for KVPY Examination for Physics of Standard 11thFull description
KVPY QUESTION WITHANSWER(18-10-10)
1.
If xy = r, xz = r 2 and yz = r3 also, x + y + z = 13 and x2 + y2 + z2 = 91, then find the value of z/y. z/y. (A) 3
Sol.
2.
Sol.
(A) their reactivity with achiral reagents. (B*) their optical rotation of plane polarized light. (C) their melting points.
(D)
r=3
z xz = y xy r2 = r = r = 3. Bunty mixed 440 gm of ice at 0ºC with 540 gm of water at 80ºC. Then what would remain after sometime : (A) only ice (B*) only water (C) ice and water in same amount (D) ice and water will vapourise Mass of ice, m1 = 440 g Temperature empera ture of ice = 0ºC Mass of water, m2 = 540 g Temperature emperatur e of water = 80ºC Heat given by water in falling the temperature tem perature from 80ºC to 0ºC Q = m1 Sw Q1 = 540 × 1× (80 – 0) = 43200 cal Heat taken by ice to melt Q2 = m2L Q2 = 440 × 80 = 35200 cal Q < Q 1 2 So all the ice will melt only water will remain.
The (R) and (S) enantiomers of an optically active compound differ in
7 (B) 3
5 3 2 2 2 2 (x + y + z) = x + y + z + 2 (xy + yz + zx) 169 = 91 + 2(xy + yz + zx) 169 = 91 + 2(r + r2 + r3) r + r2 + r3 = 39 r3 + r2 + r – 39 = 0 This equation satisfies when r = 3.
(C) 4
3.
(D) their solubility in achiral reagents. Sol.
The R and S enantiomers rotate the plane polarised light in opposite directions.
4.
The body is prepared for an emergency through (A) parasympathetic nervous system (B*) sympathetic nervous system (C) muscles and glands (D) skeleton and muscles.