General Science · NDA previous year questions

Which one among the following is commonly used as an ‘anti-skinning agent’ in paints ?

1. A.Gelatin
2. B.N-methyl pyrrolidone
3. C.Pyridine
4. D.Polyhydroxy phenol

In which one among the following situations, the bulb ⊗ would glow the most ? (Consider all batteries are the same)

1. A.Option 1
2. B.Option 2
3. C.Option 3
4. D.Option 4

Which one of the following sketches correctly describes a lever of second class?

1. A.Option 1
2. B.Option 2
3. C.Option 3
4. D.Option 4

Which one among the following is correct for a person suffering from myopia?

1. A.The person can see near objects clearly
2. B.The person can see distant objects clearly
3. C.The person cannot distinguish colours
4. D.The person can neither see near objects nor distant objects clearly

Which one of the following is correct?

1. A.Pyroxene is commonly found in meteorites
2. B.Amphiboles form about 20% of the Earth's crust
3. C.Quartz is soluble in water
4. D.The word 'sedimentary' is derived from the Latin word kelimentum

Which one among the following fertilizers is a source of nitrogen?

1. A.Superphosphate
2. B.Potassium sulfate
3. C.Bone meal
4. D.Urea

Which among the following are essential constituents of Portland cement?

1. A.Sand, lime, clay
2. B.Silica, alumina, lime
3. C.Silica, lime, graphite powder
4. D.Sand, graphene, clay

What is the oxidation state of Vanadium in $V_2{O}_5$?

1. A.+2
2. B.+4
3. C.+3
4. D.+5

Which among the following is the correct composition of Borax?

1. A.Sodium, Boron, Magnesium and Hydrogen
2. B.Sodium, Boron, Oxygen and Hydrogen
3. C.Potassium, Boron, Oxygen and Hydrogen
4. D.Sodium, Boron, Nitrogen and Hydrogen

In most prokaryotes, the chromosome number is:

1. A.4
2. B.3
3. C.2
4. D.1

Galvanization is a method of protecting iron from rusting by coating with a thin layer of

1. A.Gallium
2. B.Aluminum
3. C.Zinc
4. D.Silver

Relationship between a flower and honey-bee will help the flower for/in

1. A.Faster development
2. B.Pollination
3. C.Quick germination of pollen
4. D.Increase in size

Which one of the following is the correct sequence during sexual reproduction in Angiosperms?

1. A.Egg → zygote → embryo → seed
2. B.Embryo → egg → zygote → seed
3. C.Egg → embryo → zygote → seed
4. D.Egg → seed → zygote → embryo 2 2

An iron nail sinks in water whereas an iron ship floats. Which of the following statements is correct in this regard? 1. Average density of ship is greater than that of the water 2. Average density of iron nail is greater than that of the water 3. Average density of the ship is less than that of the water 4. Average density of the ship is equal to that of the water Select the correct answer using the code given below:

1. A.1 and 2
2. B.2 and 3
3. C.2 and 4
4. D.1 and 4

Which among the following is NOT true with respect to colloidal solution?

1. A.Particles are uniformly distributed throughout the solution
2. B.Colloidal solution is homogenous in nature
3. C.They show Tyndal effect
4. D.They do not settle down when kept undisturbed

Kerosene and petrol mixture can be best separated by

1. A.Sublimation
2. B.Separating funnel
3. C.Fractional distillation
4. D.Compressing and cooling A B c A B c A B c A B c

As proposed by Dalton, which of the following symbol represents phosphorus?

1. A.Option A
2. B.Option B
3. C.Option C
4. D.Option D

Who among the following is not a recipient of Nobel Prize in Chemistry in 2022?

1. A.Carolyn R. Bertozzi
2. B.Benjamin List
3. C.Morten Meldal
4. D.K. Barry Sharpless 1 2 1 2 1 2

Browning of the chopped apple can be minimized by :

1. A.using table sugar.
2. B.preserving in a container.
3. C.using lemon juice.
4. D.using milk of magnesia.

Which one of the following apparatus is used for separating benzene and water mixture?

1. A.Round bottom flask
2. B.Conical flask
3. C.Separating funnel
4. D.Dean and Stark apparatus

Among the following, which is not the correct method for keeping the curd?

1. A.Keeping in stainless steel vessel
2. B.Keeping in copper vessel
3. C.Keeping in plastic vessel
4. D.Keeping in glass vessel

For manufacturing of glass, which among the following is used as a source of silica?

1. A.Fine clay soil
2. B.Wood powder
3. C.Coconut shell
4. D.Sand

Which among the following is the correct arrangement of halogens in the increasing order of their oxidizing nature?

1. A.F, CI, Br, I
2. B.CI, Br, F, I
3. C.Br, I, CI, F
4. D.I, Br, CI, F

Which one of the following is an example of Second Class Lever?

1. A.A pair of scissors
2. B.A bottle opener
3. C.A cricket bat
4. D.A bow and arrow

An object is made of two equal parts by volume; one part has density ${\rho }_0$, and the other part has density $2{\rho }_0$. What is the average density of the object?

1. A.$3{\rho }_0$
2. B.$\frac{3}{2}{\rho }_0$
3. C.${\rho }_0$
4. D.$\frac{1}{2}{\rho }_0$