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NDA General Science Questions

Which fertilizer is assimilated directly by the plant?
(a) Super phosphate
(b) Nitrolim
(c) Muriate of Potash
(d) Humus

Q2. Which one of the following materials is suitable for water purification?
(a) Silicones
(b) Zeolites
(c) Asbestos
(d) Quartz

Q3. When concentrated H2SO4 spills on a surface, it should be immediately cleaned
(a) with a piece of cloth
(b) by adding cold water
(c) by adding solid Na2CO3
(d) by adding solid BaCl2

Q4. Acid turns blue litmus red and base turns red litmus blue. A student tested a liquid with a red litmus paper which remained red with no change. This shows that the liquid
(a) is not a base
(b) is not an acid
(c) is neither an acid nor a base
(d) must be pure water

Q5. Which one among the following is an electrochemical cell that cannot be charged?
(a) Electrolytic cell
(b) Storage cell
(c) Primary cell
(d) Fuel cell

Q6. Let us assume that air density(0.0013g/ cm3) remains constant as we go up in the atmosphere. In such a hypothetical case, what is the approximate height of atmosphere to have 1 atmospheric pressure?
(a) 4 km
(b) 8 km
(c) 40 km
(d) 80 km.

Q7. Consider the following statements:
An external pressure p0 is applied to the surface of a liquid in a container. Then,
 1. the pressure on all side-wells increases by p0
 2. the pressure on the bottom wall increases by p0. 3. the pressure at all points inside the liquid increases by p0.
Which of the statements given above is/are correct?
(a) 1, 2 and 3
(b) 1 and 2 only
(c) 1 and 3 only
(d) 2 and 3 only

Q8. Specific gravity of silver is 11 and specific gravity of iron is 8. Which one among the following is the approximate relative density of silver with respect to iron?
(a) 1.4
(b) 0.7
(c) 3.0
(d) 2.8 Directions

Q9. A motorcycle, a car and a bus all have the same kinetic energy. If equal braking forces are applied to them, they come to a halt after travelling x, y and z units of distance respectively. Which one of the following is correct?
(a) x < y < z
(b) x > y > z
(c) x = y = z
(d) Relationship between x, y and z cannot be determined on the basis of given data

Q10. What is the correct sequence in which the lengths of the following units increase?
 1. Angstrom
 2. Micron
 3. Nanometer
Select the correct answer using the code given below
(a) 1, 2, 3
(b) 3, 1, 2
(c) 1, 3, 2
(d) 2, 3, 1

Q11. A body is thrown vertically upwards and then falls back on the ground. Its potential energy is maximum
(a) on the ground
(b) at the maximum height
(c) during the return journey
(d) both on the ground and at the maximum height

Q12. When a moving bus suddenly applies brakes, the passengers sitting in it fall in the forward direction. This can be explained by
(a) the theory of relativity
(b) Newton’s first law
(c) Newton’s second law
(d) Newton’s third law

 1. (c)2. (b)3. (d)4. (d)5. (c)6. (b)7. (a)8. (a)9. 10. (c)11. (b)12. (b)

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