NSMQ2025 Preliminary Stage Sample Past Questions and Answers: SET 06.

Preamble: Two fair dice are thrown once. Given that the total score is eight, find the probability.

1. Both scores are odd.

Ans: 2/5

2. Both scores are even.

Ans: 3/5

3. Both scores are prime numbers.

Ans: 2/5

Preamble: Predict the molecular geometry of a molecule given that it has.

4. Two bonding electron pairs and one non-bonding pair.

Ans: Bent.

5. Three bonding electron pairs and one non-bonding pair.

Ans: Trigonal pyramidal.

6. Two bonding electron pairs and two non-bonding pairs.

Ans; Bent

Preamble: The specific heat capacity of water is 4,200 Jkg^-1K^-1. Find the final temperature attained when the given masses of water at the given temperatures are mixed without heat loss.

7. 25 kilograms of water at 32°C is mixed with 0.35 kilograms of water at 20 °C.

Ans: 25 degrees Celsius.

8. 50 kilograms of water at 25°C is mixed with 0.80 kilograms of water at 64 °C.

Ans: 49 degrees Celsius.

9. 10 kilograms of water at 72 degrees Celsius is mixed with 0.30 kilograms of water at 36 degrees Celsius.

Ans: 45 degrees Celsius.

Preamble: Predict the likely mode of decay for the given nuclide, If any

10. Helium three

Ans: No decay (it is stable)

11. Beryllium seven.

Ans: Positron decay.

12. Sodium 22

Ans: An electron capture or positron decay.

13. Find the potential energy of a spring of spring constant 200 Nm^-1, when its extension is 2 cm.

Ans: 4 x 10^-2J

14. Find the kinetic energy of a particle moving at 5 ms^-1, if its kinetic energy is 64J when it moves at 4ms^-1.

Ans: 100 Joules.

15. Find the horizontal range of a projectile launched from level ground at 15 degrees above the horizontal with a speed of 0.1 kilometers per second.

Ans: 0.5 kilometers

16. A compound has the formula C_XH₈O₂. If 0.025 mole of the compound has a mass of 3.10 grams, determine the value of X.

Ans: 7

17. How much charge is needed to deposit 5.40 grams of aluminium metal by electrolysis?

Ans: 57,900 coulombs.

18. Which cells are responsible for the dark skin colour in humans?

Ans: Melanocytes

19. Name the viscous substance produced by glands and cells in the human body that serves as a protective barrier in the respiratory system

Ans: Mucus

20. What does the directions of arrows in a typical food chain depict?

Ans: Flow of energy

TRUE/FALSE

Preamble: A 2kg particle is located at the origin, and a 4kg particle is located on the x-axis at X = 6cm.

1. The center of mass of the two particles is located on the x-axis.

Ans: True

2. The center of mass of the two particles is closer to the 2kg particle than to the 4kg particle.

Ans: False

3. The center of mass of the two particles lies between the origin and the point at X = 6cm.

Ans: True

4. At the same temperature and pressure, the average kinetic energy of helium atoms is greater than that of an oxygen molecule.

Ans: False

5. At STP, one mole of carbon dioxide occupies a greater volume than one mole of nitrogen gas.

Ans: False

6. At high pressures, gas particles themselves occupy a smaller volume than at normal pressure.

Ans: False

7. Internal fertilization occurs in reptiles.

Ans: True

8. Internal fertilization occurs in some birds.

Ans: True

9. Internal fertilization occurs in some fish.

Ans: True

10. A kite is a rhombus.

Ans: False

11. A rhombus is a parallelogram.

Ans: True

12. A square is a rhombus.

Ans: True

13. Calcium hydroxide is highly soluble in water.

Ans: False

14. Potassium bromide is more soluble in water than silver bromide.

Ans: True

15. Most transition metal chlorides are soluble in water.

Ans: True

16. Endospermic cells are mostly triploid, but in some plants, they may be diploid or polyploid.

Ans: True

17. In some dicotyledonous plants, mature seeds contain food stored in the endosperm.

Ans: True

18. The fluid in coconut fruits is an example of liquid endosperm.

Ans: True

Source: Galmeek.com

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