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Analysis of last three years papers of Stream SA of KVPY examination
INTERVIEW QUESTIONS
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This is the book for KVPY Examination for Physics of Standard 11thFull description
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KVPY QUESTION WITHANSWER(19-10-10)
1.
An operation defind as the product of non zero digits of x. e.g. An operation
x
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.
defined as
the product of non zero digits of x. e.g.
25
= 2 × 5 = 10, then the sum of all the possible 3.
n
Sol.
2.
Sol.
1 mixture of ortho- and para-nitrophenols is
where n is a two digit number formed by
the digits 1, 2, 3, 4, 5, 6,7, 8, and 9 is : (A) 2350 (B) 2007 (C*) 2025 (D) 4014 Sum of numbers when tens digit is 1. S1 = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 45 Sum of number when ten’s digit is 2 S2 = 2 + 4 + 6 + .........+ 18 = 2(1 + 2 + 3 + ..........+ 9) = 2 × 45 Similarly S3 = 3 + 6 + 9 + ........+ 27 = 3(1 + 2 + 3 + .......+ 9) = 3 × 45 S4 = 4 × 45 S9 = 9 × 45 Tota otall sum sum = S1 + S2 + S3 + ....... + S9 = 45 + 2 × 45 + .......+ 9 × 45 = 45 (1 + 2 + 3 +.....+ 9) = 45 × 45 = 2025. Steam at 100º C is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02kg at 15ºC till the temperature of the calorimeter and its contents rises to 80ºC .The mass of the steam condensed in kilogram is : (A*) 0.130 (B) 0.065 (C) 0.260 (D) 0.135 ML + m × S (100 – 80) = (1.1 + 0.02) × S × (80 – 15) m × 540 + 20 m = 1.12 × 65 m = 0.130 kg Q = m1 Sw
The most suitable method for separation of a 1:
Sol.
(A) Su Sublimation
(B) Ch Chromatography
(C) (C) Cry Cryst stal alli liz zati ation
(D*) Steam di distillation
Due to chelation, o-nitrophenol exists as monomer and hence boils at lower boiling point than thep-nitrophenol
36.
If you put a nail at the middle of a young plant and allow it to grow, then : (A*) You You will find the nail at the same position after the tree is fully grown (B) The nail will fall out (C) The nail will rise along with the tree (D) The nail will come closer to the ground