NSEJS 2021 17th Jan Question Paper

Which of the following is not a function of mature RBCs?

In which of the following classes of vertebrates there are groups of animals without limbs?

Which of the following groups have only one pair of wings?

During an expedition to planet ‘Imagitica’, scientists analysed the genetic material of
the organisms found there and noted the following features:
i. Amount of purines and pyrimidines is unequal
ii. Absence of thymine
iii. Unstable genetic material, with high frequency of mutation
iv. Rapid degradation at pH above 12
From the above data, what genetic material might the Imagitica inhabitants contain?

Which of the following is most likely to show aerenchyma?

Given below are three statements about bryophytes:
i. Bryophytes are lower plants with plant body differentiated into root, stem and
leaves.
ii. Bryophytes are devoid of xylem and phloem.
iii. Bryophytes require water for completion of their life cycle.
Which of the above statement/s is/are true with respect to bryophytes?

Carbon fixation in most of the succulent plants takes place through which pathway?

If a flower is large, wide-mouthed, white, showing anthesis after sunset, and emitting fruity or musky fragrance, it is most likely to be pollinated by

Coal is a common fossil fuel. It contains 0.2 to 5.0 percent sulphur which on burning produces a gas responsible for acid rain. The number of atoms in one mole of this gas is

The stomach fluid in human contains HCl, KCl and NaCl. The stomach fluid is highly acidic and plays an important role in the digestion of food as well as killing of bacteria. The increased acidity may lead to abdominal pain, nausea, bloating, and heartburn. Such a patient is prescribed antacid tablet which mainly contains aluminium hydroxide with molar mass 78. If the concentrations of HCl, KCl and NaCl are $$0.01\,\mathrm{M}$$ each and the stomach fluid volume is 2 litre, the amount of $$\mathrm{Al(OH)_3}$$ required to neutralize the fluid will be

A $$0.500\,\mathrm{g}$$ mixture of calcium carbonate and calcium oxide was strongly heated to produce a non-combustible gas. If the weight of the residue obtained on heating is found to be $$0.434\,\mathrm{g}$$, the percentage of calcium oxide in the mixture is

Arrange the following in the increasing order of their metallic character Na, C, O, Li, Be

A 50 mL of $$0.1\,\mathrm{M}$$ acetic acid solution is taken in a beaker and two wires are dipped in it as shown in following figure.

When electric supply is switched on, the bulb glows. To this solution, distilled water is added slowly till the volume doubles. During the addition of water, the intensity of the bulb

A compound X when heated with NaOH solution produces a pungent gas that turns red litmus blue. When an aqueous solution of X is treated with $$\mathrm{AgNO_3}$$ solution, a white precipitate Y is obtained which on keeping in sunlight turns grey liberating pale yellowish green gas. The aqueous solution of compound X is

Equal masses of two gases among $$\mathrm{N_2}$$, $$\mathrm{NO}$$, $$\mathrm{O_2}$$, $$\mathrm{CO}$$, $$\mathrm{CO_2}$$ and $$\mathrm{SO_2}$$ occupy same volume at STP. These two gases are

When a solution and the pure solvent are separated by a semipermeable membrane, the solution exerts a pressure on the membrane called osmotic pressure. The osmotic pressure increases with increase in number of particles, ions or molecules, in the solution. If 10 millimoles of each of the sulphate salts of sodium, magnesium and aluminium are dissolved in 1.0 litre of water in three different beakers labelled as P, Q and R respectively, the osmotic pressure follows the order

The axes of a coordinate system $$S_2$$ are inclined at an angle $$\theta$$ to those of another coordinate system $$S_1$$. The origins of both the systems are coinciding. A particle $$P_1$$ at rest in system $$S_1$$ starts from point $$(-2,0)$$ and travels along positive direction of $$X_1$$ axis with uniform acceleration of $$1.25\,\mathrm{m/s^2}$$ for 4 s and stops. In system $$S_2$$, particle $$P_2$$ starts from rest from the origin and travels for 2 s along positive direction of $$X_2$$ axis with uniform acceleration $$5\,\mathrm{m/s^2}$$ and stops. If the final distance between $$P_1$$ and $$P_2$$ is 6 m, then the angle between $$+Y_1$$ axis and $$+X_2$$ axis is

The variation of a certain physical parameter Z with variable u is given by the relation $$Z = A\left(\frac{R}{R+u}\right)^3$$, where R and A are constants and the maximum value of u is much less than R. Then to find R, a student plots a graph of variation of Z, Y axis, against u, X axis. The graph is a

A submarine $$S_1$$ is parked at a depth of 200 m in an ocean on earth. Assume oceans exist on Mars. At about what depth a submarine $$S_2$$ has to be parked in an ocean on Mars so that $$S_2$$ will experience same pressure as that of $$S_1$$? Acceleration due to gravity on Mars is $$3.7\,\mathrm{m/s^2}$$. Assume that sea water density on Earth and Mars is same, $$\rho = 1.03 \times 10^3\,\mathrm{kg/m^3}$$.

In an oscillating system, damping results in dissipation of the stored energy. The following figure shows the variation of displacement x with time t for an oscillating system. Which of the following statements best describes this physical phenomenon.

In the adjacent circuit, the galvanometer G does not show any deflection. If $$R = 2\,\Omega$$, the current drawn from the cell is

Gear is a mechanical system used to transfer mechanical and rotary motion from one mechanical system to another. As shown in the figure below the driving wheel A drives the driven wheel B without slipping and thus forms the gear system. The wheel A has 16 teeth and B has 24 teeth. Wheel B has a projection of radius $$\frac{14}{11}\,\mathrm{cm}$$.

A long massless, inextensible string can be wound or unwound over this circular projection. A mass m is attached to the free end of this long string. If the wheel A makes 6 revolutions per second in the clockwise direction, without slipping, then in $$\frac{1}{2}$$ second the potential energy of the mass m in CGS unit

Canopus is the second brightest star in the night sky. It is about 300 light years away. The energy is produced inside the star through nuclear reactions. If we receive $$5.0 \times 10^{-8}\,\mathrm{W/m^2}$$ energy from Canopus, how much mass does it lose per second?

An average human adult radiates about 100 W energy mainly in infra-red region of the electromagnetic spectrum. 50 persons are sitting in a hall with an air conditioning system which is 50 percent efficient. How much electricity must be used to maintain temperature of the hall at $$25^\circ\mathrm{C}$$ for 4 hours?

Given below are four statements about viruses. Which of the following statement or statements is or are incorrect?

During a race, Ramesh was thrown off the horse back and suffered an injury in the front part of head. Upon thorough examination, Ramesh was found to have injury to the front part of the head. Which of the following can be the possible outcome or outcomes of this injury?

Which of the following molecules are primarily responsible for structural support and motility?

The types of bonding found in dry ice is or are

The compound or compounds that raise the temperature of water from room temperature on dissolving in it is or are

Soaps and detergents are common agents used in laundry industry. They are long chain hydrocarbons with ionic terminals of cationic or anionic nature. A 1 percent w/v soap solution X and 1 percent w/v detergent solution Y were prepared in distilled water. Each of the solutions was divided in two equal parts and labelled as X1, X2, Y1 and Y2. 1 g NaCl was added to X1 and Y1 each while 1 g CaCl2 was added to X2 and Y2 each. Which of the following observations is or are correct?

According to Einstein's theory, light can be assumed to be in the form of a large number of discrete energy packets called photons. In case of light of frequency $$\nu$$, each photon carries energy $$E=h\nu$$. In a certain surgical procedure a surgeon uses LASER beam of wavelength 650 nm in pulses of 30.0 ms duration. The average power of each pulse is 0.6 W. Here h is Planck's constant. Then

In the following circuit, $$R_1 = 6\,\Omega$$, $$R_2 = 12\,\Omega$$, $$V = 16\,\mathrm{V}$$. The currents $$I_1$$ and $$I_2$$ flow through the resistances $$R_1$$ and $$R_2$$ respectively.

A glass plate of uniform thickness $$t$$ and refractive index $$\mu$$ is as shown in the diagram. AB is the incident ray and FG is the emergent ray. The angles of incidence and refraction are $$i$$ and $$r$$ respectively. The perpendicular distance FC = x between the incident and the emergent rays is called the lateral shift. Then