NAT Scientific Aptitude 2 β Questions and Answers
Question 1: Which of the following electromagnetic waves has the highest frequency?
- Radio waves
- Infrared radiation
- Ultraviolet radiation
- Gamma rays (Correct answer)
Correct answer: Gamma rays
Gamma rays have the highest frequency (and shortest wavelength) in the electromagnetic spectrum, carrying the most energy per photon.
Question 2: What is the chemical formula for glucose?
- CβHββOβ (Correct answer)
- CββHββOββ
- CHβ
- CβHβ OH
Correct answer: CβHββOβ
Glucose is a monosaccharide with the molecular formula CβHββOβ, containing 6 carbon, 12 hydrogen, and 6 oxygen atoms.
Question 3: Which of Newton's laws explains why a rocket accelerates as it expels exhaust gases?
- First Law (Law of Inertia)
- Second Law (F = ma)
- Third Law (Action-Reaction) (Correct answer)
- Law of Universal Gravitation
Correct answer: Third Law (Action-Reaction)
Newton's Third Law states that for every action there is an equal and opposite reaction; the rocket expels gas backward (action) and is propelled forward (reaction).
Question 4: What is the process by which plants convert sunlight into chemical energy?
- Cellular respiration
- Photosynthesis (Correct answer)
- Fermentation
- Transpiration
Correct answer: Photosynthesis
Photosynthesis is the process by which plants use sunlight, water, and COβ to produce glucose and oxygen, converting light energy into chemical energy.
Question 5: Which subatomic particle determines the atomic number of an element?
- Neutron
- Electron
- Proton (Correct answer)
- Positron
Correct answer: Proton
The atomic number of an element equals the number of protons in its nucleus; elements are defined and ordered on the periodic table by their proton count.
Question 6: A wave has a frequency of 50 Hz and a wavelength of 4 m. What is its speed?
- 12.5 m/s
- 46 m/s
- 200 m/s (Correct answer)
- 54 m/s
Correct answer: 200 m/s
Wave speed = frequency Γ wavelength = 50 Hz Γ 4 m = 200 m/s.
Question 7: Which type of rock is formed from the cooling and solidification of magma or lava?
- Sedimentary
- Metamorphic
- Igneous (Correct answer)
- Composite
Correct answer: Igneous
Igneous rocks form from the cooling and solidification of molten magma (underground) or lava (at the surface), such as granite and basalt.
NAT Scientific Aptitude 2
Which of the following electromagnetic waves has the highest frequency?