General Science · NDA previous year questions

A fish is at a depth d in water of refractive index 4/3. If a transparent slab of refractive index 3/2 and thickness d/2 is placed on the surface of water, then which one of the following is the apparent depth of the fish as observed by an observer in air?

1. A.d/2
2. B.5d/8
3. C.13d/12
4. D.17d/24

In a dry test tube, 2 mL of HCl (0.1 N) is taken. To this, 4 mL of NaOH (0.1 N) is added. The solution is stirred well, followed by the addition of 2 drops of phenolphthalein. What will be the colour of the solution?

1. A.Colourless
2. B.Red
3. C.Pink
4. D.Blue

Consider the following pairs: $$\begin{array}{lll}& \text{Example of Colloid}& \text{Type of Colloid}\\ \text{I.}& \text{Cloud}& \text{Aerosol}\\ \text{II.}& \text{Mud}& \text{Sol}\\ \text{III.}& \text{Milk}& \text{Emulsion}\\ \text{IV.}& \text{Rubber}& \text{Foam}\end{array}$$ How many of the pairs given above are correctly matched?

1. A.One
2. B.Two
3. C.Three
4. D.All four

In humans, the exit of partially digested food from the stomach into the small intestine is regulated by which one of the following structures/processes?

1. A.Peristalsis
2. B.Muscular walls of stomach
3. C.Sphincter muscle
4. D.Villi in small intestine

Which one of the following is not a part of the hindbrain of human beings?

1. A.Medulla
2. B.Pons
3. C.Corpus callosum
4. D.Cerebellum

A flower typically is composed of:

1. A.Stomata, Cotyledon, Petals, Sepals
2. B.Carpels, Sepals, Petals, Cambium
3. C.Carpels, Stamens, Petals, Sepals
4. D.Petals, Sepals, Perianth, Root cap

Which one of the following valves guards the opening between the right ventricle and the pulmonary artery?

1. A.Bicuspid valve
2. B.Semilunar valve
3. C.Mitral valve
4. D.Tricuspid valve

Which one of the following respiratory volumes of human lung is the lowest?

1. A.Residual volume
2. B.Tidal volume
3. C.Inspiratory reserve volume
4. D.Expiratory reserve volume

Which of the following is/are the physical test(s) employed for the manufacture of paper? I. Mechanical and strength properties II. Surface properties III. Optical properties IV. Permeability to fluids Select the correct answer using the code given below.

1. A.I only
2. B.II and III only
3. C.I, II and III only
4. D.I, II, III and IV

Consider the following pairs: $$\begin{array}{ll}\text{I. Pigment}& \mathrm{Ti}{\mathrm{O}}_2\\ \text{II. Drier}& \text{Turpentine}\\ \text{III. Thinner}& \text{Naphthenates}\\ \text{IV. Antiskinning agent}& \text{Polyhydroxy phenol}\end{array}$$ How many of the pairs given above are correctly matched?

1. A.One
2. B.Two
3. C.Three
4. D.All the four

A non-volatile solid solute may be separated from a solution by which of the following processes? I. Evaporation II. Crystallization Select the correct answer using the code given below.

1. A.I only
2. B.II only
3. C.Both I and II
4. D.Neither I nor II

One year at a planet is 8 times as large as compared to the one year at the Earth. Which one of the following is correct about the planet's orbit?

1. A.The semimajor axis of the planet's orbit is same as that of the Earth.
2. B.The semimajor axis of the planet's orbit is twice as compared to that of the Earth.
3. C.The semimajor axis of the planet's orbit is thrice as compared to that of the Earth.
4. D.The semimajor axis of the planet's orbit is four times as compared to that of the Earth.

Quartzite is metamorphosed from which one of the following rocks?

1. A.Pegmatite
2. B.Limestone
3. C.Sandstone
4. D.Shale

One parsec in astronomical units (A.U.) is about

1. A.$2\times 10^3$ A.U.
2. B.$2\times 10^4$ A.U.
3. C.$2\times 10^5$ A.U.
4. D.$2\times 10^6$ A.U.

A body sinks in water when

1. A.density of water is greater than density of body
2. B.density of water is less than density of body
3. C.density of water is equal to density of body
4. D.the body is heavy

A person can see nearby objects clearly but cannot see distant object distinctly, the person is suffering with

1. A.Hypermetropia
2. B.Presbyopia
3. C.Myopia
4. D.None of above

Which one of the following is NOT present in cement ?

1. A.$2CaO.Si{\mathrm{O}}_2$
2. B.$3CaO.Si{\mathrm{O}}_2$
3. C.$4CaO.Si{\mathrm{O}}_2$
4. D.$3CaO.A{\mathrm{l}}_2{\mathrm{O}}_3$

Which one: of the following is considered to be the purest source of water ?

1. A.River water
2. B.Sea water
3. C.Well water
4. D.Rain water

The book ‘The Origin of Species by Means of Natural Selection’ was authored by

1. A.Charles Darwin
2. B.Carolus Linnaeus
3. C.Barbara McClintock
4. D.Copernicus

The amount of air breathed in and out during a normal respiration by human lungs is referred to as

1. A.Vital capacity
2. B.Tidal volume
3. C.Inspiratory volume
4. D.Total lung capacity

Which one of the following is also known as Dry ice in its solid form?

1. A.SiO₂
2. B.CO₂
3. C.CaO
4. D.MgO

Cambium is an example of

1. A.Lateral meristem
2. B.Apical meristem
3. C.Intercalary meristem
4. D.Permanent tissue

Initial discovery of antibiotic penicillin was done by

1. A.Francis Crick
2. B.Maurice Wilkins
3. C.Charles Darwin
4. D.Alexander Fleming

Which one among the following tissues help to connect two bones ?

1. A.Tendons
2. B.Ligaments
3. C.Areolar tissue
4. D.Cartilage

In which one among the following the vegetative propagation takes place through Eye Buds ?

1. A.Potato
2. B.Ginger
3. C.Onion
4. D.Sugarcane