Code – B
ANSWER KEY
PART – A
Q1. Magnesium powder, placed in an air- tight glass container at ......
Answer : 4. 0.8 bar
Q2. Living beings get energy from food ......
Answer : 3. oxygen
Q3. In Δ ABC, angle A is larger than angle C and ......
Answer : 2. 53°
Q4. Which of the following statements about ......
Answer : 3. it has steadily increased since the formation ......
Q5. See the following mathematical ......
Answer : 4. (iv) to (v)
Q6. The Number of craters observed due to meteoritic impacts ......
Answer : 4. earlier craters are not preserved .....
Q7. What is the angle θ in the quadrant of a ......
Answer : 1. 135°
Q8. During a total solar eclipse occurring at ......
Answer : 1. on the following night only
Q9. A cupboard is filled with a large number of balls of 6 different ......
Answer : 4. 6
Q10. The variation of solubilities of two compounds ......
Answer : 3. solubility of X and Y are the same at 75°C
Q11. Restriction endonuclease cleaves DNA molecules at ......
Answer : 1. 4
Q12. A solid cube of side L floats on water with 20% of its volume ......
Answer : 1. 4
Q13. Inner planets of the solar system are rocky, whereas outer ......
Answer : 1. solar heat drove away the ............
Q14. On exposure to desiccation, which of the following ......
Answer : 4. Cocci in clusters
Q15. A bell is rung before giving food to a dog. After doing this ......
Answer : 2. the dog salivates on hearing the bell
Q16. When a magnet is made to fall free in air it falls ......
Answer : 1. a part of the gravitational potential .....
Q17. For an elastic material, strain is proportional to stress ......
Answer : 1.
Q18. The conductance of a potassium chloride solution is ......
Answer : 2. 0.5
Q1 9 . An overweight person runs 4 km everyday as an ......
Answer : 3. 20 % less
Q20. What is the half-life of the radio isotope ......
Answer : 1. 1 day
