NDA Previous Year Questions

Consider the following statements in respect of cell and its structure :

I. All cells possess cell wall.

II. All cells have ribosomes present inside.

III. All cells have well-organized nucleus.

IV. All cells have linear DNA molecules present in them.

Which of the statements given above is/are correct?

The large well supplying water to the Great Bath of Mohenjo-daro was located

Select the correct sentence

Who among you has the answer?

A particle is moved from point X to point Y under a force field. The work done depends only on the initial and final speeds. Which one of the following is correct?

An object is placed far beyond the centre of curvature of a concave mirror. The object then starts accelerating towards the mirror. Which one of the following is correct?

Select the correct sentence

When I would arrive, I will call you.

Consider the following statements regarding the Earth's crust:

I. The continental crust is thinner under fold mountains.

II. The mean thickness of ocean crust is 30 km.

III. The Earth's crust is brittle in nature.

Which of the statements given above is/are correct?

The position vector of a particle is given by $\vec{r}=\sqrt{3}{t}^2\hat{i}+\sqrt{2}t\hat{j}+\sqrt{5}\hat{k}$. Which one of the following statements is correct?

Consider the following statement :

"Acids are substances that dissociate in water to give hydrogen ions H^+ (aq), and bases are substances that produce hydroxyl ions OH^- (aq)."

The above statement is based on which one of the following concepts?

Select the word that is nearest in meaning to the underlined word/words

The oppressive pollution was noticed to have $\underline{abated}$ after the unseasonal rainfall.

$1.7$ g of silver nitrate is dissolved in $100$ g of water, and $0.585$ g of sodium chloride is dissolved in $100$ g of water. Both are mixed and a chemical reaction occurs. $1.435$ g of silver chloride and $0.85$ g of sodium nitrate are formed. Which law of chemical combination is shown by the above reaction?

A constant power machine pulls a block on a smooth horizontal surface. Which one of the following correctly describes the relation between speed of the block ($v$) and time ($t$)?

Consider the following statements:

I. Earthquake waves are basically of two types, namely body waves and surface waves.

II. The body waves interact with the surface rocks and generate surface waves.

Which of the statements given above is/are correct?

Consider the following statements with regard to bead production in Harappan towns:

I. The materials used to make beads included carnelian, quartz and steatite.

II. The beads were cylindrical, barrel-shaped and disc-shaped.

III. Specialized stone drills were used for making holes through the beads.

Which of the statements given above are correct?

A floating body is in stable state. Which one of the following is correct?

Consider the following statements about temperature inversion:

I. This happens when normal lapse rate gets inverted.

II. Winter nights with cloudy skies are conducive for temperature inversion.

III. Polar areas experience inversion throughout the year.

Which of the statements given above are correct?

Which one of the following parts of an ovule possesses reserve food?

A periscope uses two plane mirrors inclined at $45^{\circ }$. If the tube of the periscope is filled with a complete transparent liquid of refractive index $1.5$, then which one of the following is correct in respect of the image seen?

A 4-digit number is selected at random formed by using the digits 0, 1, 2, 3 and 4 (where repetition of digits is not allowed). What is the probability that the number selected is divisible by 3 ?

Select the correct sentence

Although it was raining, we had the picnic.