Mock Test 3
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Mock Test 3
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25 Questions

1. Main substance involved in transfer of electrons in photosynthesis is
2. Number of chromosomes in Down's syndrome is
3. The rate constant for the first-order decomposition of a certain reaction is described by the equation log k (s'1) = 14.34______. The energy of activation for this reaction is
4. Pollination by wind is called
5. A particle is to be projected, with a given velocity v, in such a way that its horizontal range becomes equal to the maximum height attained by it. The required angle of projection is
6. Mumps is a disease caused by
7. A products: [A]0 = 2 M. After 10 min, the reaction is 10% completed. If '''' = k [A], then t½ is approximately
8. A bullet is fired and gets embedded in a block kept on table, then if table is frictionless
9. A circular turn table has a block of ice placed at its centre. The system rotates with an angular speed w about an axis passing through the centre of the table. If the ice melts, on its own, without any evaporation, the speed of rotation of the system
10. Two boats are moving in same direction in a river. What is the best condition so that they move parallel in the same direction?
11. In an experiment, on the measurement of 'g', using a simple pendulum, the time period was measured with an accuracy of 0.2% while the length was measured with an accuracy of 0.5%. The accuracy in the value of 'g' thus obtained is
12. A particle moves along the x-axis such that its coordinate (x) varies with time (t), according to the expression: x = 2 ' 5t + 6t2 where x is in metres and t is in seconds. The initial velocity of the particle is
13. The solubility of AgI in NaI solution is less than that in pure water because
14. A first-order reaction is 20% completed in 10 min. In how much time, will it be 75% complete approximately?
15. Movements due to light are shown by
16. Myopia is connected with the
17. The half lifetime for the decomposition of a substance dissolved in CCl4 is 2.5 h at 30°C. The amount of the substance left after 10 h, if the initial weight of substance is 160 g, is
18. The odd one among the following is
19. Pulses are a good source of
20. A ball is dropped from a spacecraft revolving around the earth at a height of 120 km. What will happen to the ball?
21. Plants are killed in winter by frost because
22. Minute, circular discs floating in the blood, which carry oxygen to the tissues, and carbon dioxide away from them, are called
23. A weak acid HA has Ka = 10'6. What would be the molar ratio of this acid and its salt with strong base so that pH of the buffer solution is 5?
24. Photosynthesis takes place faster in
25. Normal adult human male has

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