NSMQ2024 1/8th Stage: Sample Past Questions and Answers: SET 02.

Preamble: Give the name of the main component of the mass spectrometer.

1. Separate ions based on their mass-to-charge ratios.

Ans: Mass analyzer.

2. Convert samples into charged particles.

Ans: Ionization chamber.

3. Receives ions and generates electrical signals.

Ans: The detector.

Preamble: A particle projected horizontally at 24 meters per second from a point above ground is airborne for 4.0 seconds. Neglect air resistance.

4. Find the magnitude of the particle’s vertical velocity component at the instant it strikes the ground.

Ans: 40 m

5. Find the vertical distance the particle falls to reach the ground.

Ans: 78 m

6. Find the horizontal distance the particle travels when it is 19.6 meters per second below the level at which it was projected.

Ans: 48m

7. What is the main function of endosperm in angiosperms?

Ans: The endosperm provides nutrients or nourishment for the developing embryo.

8. Name the parts of angiosperms that have mostly contributed to their evolutionary success when compared to other land plant groups.

Ans: because they flower in fruit.

9. Name the physiological process that is most important in the movement of water up a tall tree.

Ans: Transpiration.

Preamble: The compound with the molecular formula C₅H₁₀Br₂ is a vicinal alkyl halide; both bromines are on adjacent carbons. Give the systematic name of one isomer of this compound, given that it has an alkyl substituent.

10. Ans:

• 2-3-dibromo-2-methylbutane.
• 1-2-dibromo-2-methylbutane,
• 1-2-dibromo-3-methylbutane.

Preamble: Find the wavelength of a photon of the given linear momentum.

11. 2 x 10^-27 kgms^-1.

Ans: 5.5 x 10^-7m

12. 5 x 10^-27 kgms^-1.

Ans: 4.4 x 10^-7m.

13. 5 x10^-27 kgms^-1.

Ans: 88 nanometers.

Preamble: Name the main target organ of the given hormone.

14. Melatonin

Ans: the brain.

15. Oxytocin

Ans: The mammary gland.

16. Glucagon

Ans: The liver.

17. Young’s modulus for a polymer blend is 1.5 G Pascal, Calculate the strain in a 36 cm polymer rod when the stress in it is 48 kilopascals, yes and forces.

Ans: 3.2 x 10^-5 m

18. Find the magnitude of the acceleration of an object sliding down a smooth plane inclined at 45 degrees to the horizontal.

Ans: 7 m/s².

19. Find the work done by 5.0 moles of an ideal gas whose volume increases from 1.8 x 10^-4 m³ to 3.2 x 10^-4 m³ at a constant pressure of 5.0 x 10⁴Pa

Ans: 7.0 J

20. What name is given to the simple eyes of a caterpillar, which were formerly termed lateral ocelli?

Ans: stemmata

21. Calculate the number of moles of methanol in 160 cm³ of a 50.0 percent volume in volume aqueous methanol, given that the specific gravity of methanol is 1.0 g/cm³.

Ans: 2.5 mol

22. Given that 0.084 moles of a compound A₂B₃ weighs 12.6 grams. Determine the atomic mass of element A if the atomic mass of element B is 18g/mol

Ans: 48g/mol

23. What is the total number of atoms in one formula unit of the simplest compound that can be formed between two elements with six and three electrons in the avalanche shells?

Ans: 5

TRUE/ FALSE

1. In gymnosperms, male cones are much larger than female cones and contain more gametophytes.

ANS: False

2. In gymnosperms, male cones contain macrosporophylls, while female cones contain megasporophylls.

Ans: True

3. Male cones of gymnosperms contain bracts, which are the site of microspore development.

Ans: True

4. In one second, a 1-ohm resistor carrying 1 ampere dissipates as much heat as a 2-ohm resistor carrying 0.5 amperes.

Ans: False

5. In two seconds, a 2-ohm resistor carrying 2 amperes dissipates as much heat as an 8-ohm resistor carrying 1 ampere.

Ans: True

6. In five seconds, a 1-ohm resistor carrying 4 amperes dissipates as much heat as a 4-ohm resistor carrying 2 amperes.

Ans: True

7. Under normal circumstances, alkanes can be converted into alcohols via oxidation reactions.

Ans: False

8. A method of functionalization of alkanes is reaction with concentrated sulfuric acid.

Ans: False

9. When a long-chain alkane undergoes thermal cracking, both alkanes and alkenes are produced.

Ans: True

10. An oxidizing agent always gains electrons during a chemical reaction, and it is reduced.

Ans: True

11. Oxygen always acts as an oxidizing agent in redox reactions.

Ans: False

12. Potassium permanganate acts as an oxidizing agent in both acidic and basic solutions and always produces Mn⁺² in the process.

Ans: False

13. The amplitude of a sound wave determines the quality of the sound.

Ans: False

14. The greater the amplitude of a sound wave, the greater the intensity of the sound.

Ans: True

15. The amplitude of a sound wave determines both intensity and timbre of the sound.

Ans: False

Preamble: The given statement is an example of homeostasis in humans.

16. When blood sugar levels in the human body become too low, the body releases glucagon to raise them.

Ans: True

17. In lactating mothers, the more milk the baby empties from the breast, the more milk that is produced to increase the mother’s supply.

Ans: False

18. When the body’s temperature becomes too high, it begins to attempt to lower it by sweating.

Ans: True

Source: Galmeek.com

Stay connect By Joining Our WhatsApp Channel for Prompt Updates

---

Follow to join the WhatsApp Channel.

Telegram Channel.