NSEJS 2023 26th Nov Question Paper

In animals, heart is the main pumping station, supplying and collecting blood from various parts of the body. In mammals, which of the following structures regulates the unidirectional flow of blood and is found between left auricle and ventricle?

Which of the following refer to the units involved in most of the Reflex Arcs?

Through the process of cross-breeding, mutation breeding or cytoplasmic hybridization of animals and plants, new improved, high yielding varieties or exclusively distinct hybrids are obtained. Which of the following are cytoplasmic hybrids or cybrids?

In a kind of animal tissue all cells rest on a basement membrane, but the basal cells do not reach the free surface of the epithelium. Two layers of cells and two layers of nuclei are, therefore, observable. Thus, without being stratified, the epithelium appears to have 2 or 3 layers of cells. Such epithelia are mostly ciliated and contain mucus-secreting goblet cells. These epithelia are characteristic to which of the following?

Phenylthiocarbamide (PTC) has a bitter taste. Non-tasting ability is reported to be due to recessive allele of the taster gene. In random populations about 30% people lack the ability to taste PTC. A non-taster woman is married to a PTC taster man and has three children. The first two children are born as non-tasters. What is the probability that their third child will be born a non-taster?

The diagram presented here is a sectional view of an endocrine gland. Its histologically characteristic layers are labeled as 1, 2, 3 and 4. Which of these is/are responsible for the secretion of $$C_{21}$$ Cortisol and Corticosterone hormones?

Which of the following eye defects arises due to gradual weakening of the ciliary muscles and diminishing flexibility of the eye lens?

Which of the following is an Angoumois grain moth, causing severe damage to stored grains, like paddy or wheat?

To effect fertilization in angiosperms, pollen grains germinate on the stigma and give out pollen tubes which grow through the style and reach the ovule where the male gametes are discharged close to the egg. Suppose a brinjal plant has to produce 300 seeds in a particular fruit. How many cell divisions will be required to produce the desired fruit?

In the Kingdom Plantae, which of the following examples is considered peculiar for the anatomical characters namely Carinal canals and Vallecular canals?

The secondary constriction on the chromosomes always has a constant position. Therefore, it can be used as marker to identify specific chromosomes. In addition to the centromere, one or more secondary constrictions can be observed in Metaphase stage chromosomes. These chromosomes are called Satellite or SAT chromosomes. In man they are usually associated with the short arm of acrocentric chromosomes. Select the correct option for such types of chromosomes

In some plants the secondary cell wall has depressions or pits. Adjacent pits are separated by the middle lamella and the primary cell wall, together forming the pit membrane. Which of the following is the thickening formed on the pit membrane by circular deposition of microfibrils?

The arrangement of flowers and their mode of distribution on the shoot system is characteristic to a particular plant. The diagrammatic presentation given herewith illustrates various types of inflorescences. Select the option exemplifying a kind of Cymose type.

Genes that are normally important in mammalian embryogenesis include members of all of the following classes, EXCEPT:

During a type of Carbon dioxide fixation occurring at night while the stomata are still open, the first step is the combination of $$CO_2$$ with phosphoenolpyruvate ($$PEP$$) to form 4-carbon oxaloacetate in the chloroplast of mesophyll cells. To which kind of ecological type of plant is this process related?

Some plants are specifically called hemiparasitic epiphytes. Included among them are the plants called as mistletoes. Which of the following is the most common hemiparasitic mistletoe occurring in India?

During the formation of which of the following ionic species, the process will be exothermic and endothermic respectively:

$$H2$$ reacts faster with $$Cl2$$ at 13 times faster rate than $$D2$$ because:

Select the correct order of dielectric constant, refractive index and intermolecular forces for water ($$H_2O$$) and heavy water ($$D_2O$$) at $$293\,K$$ respectively among those given below.
(i) Dielectric constant - $$H_{2}O>D_{2}O$$
(ii) Dielectric constant - $$D_{2}O>H_{2}O$$
(iii) Refractive index - $$H_{2}O>D_{2}O$$
(iv) Refractive index - $$D_{2}O>H_{2}O$$
(v) Intermolecular forces - $$H_{2}O>D_{2}O$$
(vi) Intermolecular forces - $$D_{2}O>H_{2}O$$
The option containing all correct statements is

The compound which is used to purify air in space shuttles, submarines and breathing masks is:

The total number of lone pairs of electrons in $$I_3^-$$ is

Among the elements of atomic number $$Z$$ from 1 to $$92$$, (i.e from H to U), the elements having atomic number $$\ldots$$ and $$\ldots$$ are not found in nature are

Which state of matter exists at very high temperature and at very low temperature near absolute zero respectively? BEC stands for Bose Einstein Condensate.

The bond which will break in first step when the following compound reacts with $$H_3O^+$$ is

Arrange the following compounds in increasing order of Lewis base strength.

The maximum number of $$-CH_3$$ groups which may be present in alkane $$C_{11}H_{24}$$ is close to

A glass bulb of $$1\,L$$ capacity contains $$4\,g$$ methane. The bulb is so as to burst out if the pressure exceeds just $$10\,atm$$. The temperature, at which the pressure of gas reaches the bursting point is close to. Given $$R=0.0821\,L\,atm\,K^{-1}\,mol^{-1}$$.

The pH of $$10^{-8}\,M$$ $$HCl$$ is

An element X has two natural isotopes $$5^{10}X$$ with atomic mass 10.013 u and $$5^{11}X$$ with atomic mass 11.009 u. Relative abundance of these isotopes in nature has been recorded 19.8% and 80.2% respectively. On the basis of these data, average atomic mass of element X is close to

A mass $$0.75\,g$$ of the mixture of $$Na_{2}CO_{3}$$ and $$K_{2}CO_{3}$$ is completely neutralized by $$50\,mL$$ $$0.25\,N$$ $$HCl$$. The percentage of $$Na_{2}CO_{3}$$ in the mixture is

A boy gifted a diamond ring to his mother on her wedding anniversary. If this diamond ring contains $$3$$ carat diamond then number of carbon atoms he gifted to his mother is. Given 1 carat = 200 mg.

Which of the following will form foam in water containing $$Ca^{2+}$$ and $$Mg^{2+}$$ ions?

Two blocks A and B of masses 1 kg and 4 kg respectively are moving with equal kinetic energies. Read the following statements S1 and S2. Statement S1: Ratio of speed of block A to that of B is $$1\colon2$$. Statement S2: Ratio of magnitude of linear momentum of A to that of B is $$1\colon2$$. Now choose the correct option.

The mass of a straight copper wire is $$20.95\,g$$ and its electrical resistance is $$0.065\,\Omega$$. If the density and resistivity of copper are $$d=8900\,kg/m^3$$ and $$\rho=1.7\times10^{-8}\,ohm\,meter$$ respectively, the length of the copper wire is

It is known that the speed of sound in a gas is directly proportional to the square root of its absolute temperature $$T$$ measured in Kelvin i.e v $$\propto \sqrt{T}$$ . Speed of sound in air at $$0^\circ C$$ is 332 m/s. On a hot day, the speed of sound was measured 360 m/s in NCR Delhi, the temperature of air in Delhi on that very day must have been close to

A small bar magnet is allowed to fall vertically through a metal ring lying in a horizontal plane. During its fall, the acceleration of the magnet in the region close to the ring must be, where $$g$$ is the acceleration due to gravity.

A U-tube of uniform cross section contains two different liquids in its limbs namely water (density $$1.0 \times 10^3 kg/m^3 $$)and Mercury  (density $$13.6 \times 10^3 kg/m^3 $$) as shown in figure. The difference of height of mercury column in two limbs is $$H=1.5\,cm$$. The height $$h$$ of the water column in the left limb above the Mercury column must be nearly. (Neglect surface tension effects).

An object pin is placed at a distance 10 cm from first focus of a thin convex lens on its principal axis. The lens forms a real and inverted image of this object pin at a distance $$40\,cm$$ beyond the second focus. The focal length of the lens is

A bullet of mass $$0.25\,kg$$ moving horizontally with velocity $$v$$ strikes a stationary block of mass $$1.00\,kg$$ suspended by a long inextensible string of negligible mass and length. The bullet gets embedded in the block and the system rises up to maximum height $$h=19.6\,cm$$ as shown in the figure. The value of initial speed $$v$$ of the bullet is

The equivalent resistance between points A and B in the following electrical network is

The order of magnitude of the pressure in pascal exerted by an adult human on the Earth when he stands barefoot on the Earth on both of his legs is

On the board of an experiment, three bulbs $$B_1\,(100\,W,200\,V)$$, $$B_2\,(60\,W,200\,V)$$ and $$B_3\,(40\,W,200\,V)$$ are connected to a 200 V fluctuating supply with a fuse in series as shown in the figure. The electric current rating of the fuse required in the circuit to protect all the three bulbs must be

An ant is sitting on the principal axis of a convex mirror of focal length $$f$$, at a distance $$2f$$ from the pole in front of the mirror. It starts moving on the principal axis towards the mirror. During the course of motion, the distance between the ant and its image

You are given three resistances of values $$2\,\Omega$$, $$4\,\Omega$$ and $$6\,\Omega$$. Which of the following values of equivalent resistance is not possible to get by using or arranging these three resistors in any circuit?

ABC is a $$0.8\,m$$ long curved wire track in a vertical plane. A bead of mass $$3\,g$$ is released from rest at A. It slides along the wire and comes to rest at C. The average frictional force opposing the motion in a single trip from A to C is

Two long straight conductors 1 and 2, carrying parallel currents $$I_1$$ and $$I_2$$ in the same direction, are lying parallel and close to each other, as shown in the figure. $$F_e$$ and $$F_m$$ respectively represent the electric and magnetic forces, applied by conductor 1 on conductor 2. Choose the correct alternative regarding nature of $$F_e$$ and $$F_m$$.

A doctor measures the temperature of a patient by a digital thermometer as $$37.3^\circ C$$. As a Physics student you will record his temperature in Kelvin as

Two planets P1 and P2 are moving around the Sun, in circular orbits of radii $$10^{13}\,m$$ and $$10^{12}\,m$$ respectively. The ratio of the orbital speeds of planets P1 and P2 in their respective orbits is

In a classroom, students were taught typical mammalian characters along with the names of Orders and representative examples. In the table given below, column 1 includes the names of examples or Orders whereas column 2 shows related characteristics. Choose the option(s) that has the correct match in the above table.

Continuous inheritance of some characteristics in certain human families had attracted the attention of scientists. To improve human race by selective breeding led Sir Francis Galton to collect and statistically analyze genealogies or pedigrees of a number of families where some or the other traits were regularly transmitted through generations. Which of the following relate to pedigree of beggars and scoundrels?

An important feature of plants is the ability to adapt their growth towards or away from external stimuli such as light, water, temperature and gravity. The physiological process of root gravitropism comprises gravity perception, signal transmission, growth response and the reestablishment of normal growth. Following are some of the modern concepts explaining the mechanism of root gravitropism. Which of the following best explains root gravitropism?

Photosynthesis is the process in which the phosphorylation of ADP to generate ATP occurs with the help of sunlight energy. Following are the requirements of cyclic and noncyclic phosphorylations occurring in green plants. Choose the correct option(s) related to cyclic photophosphorylation.

Select the correct statement(s) pertaining to Bohr model of an atom.

The correct order(s) of first ionization energy for the following pairs is or are:

Every solvent undergoes self-ionization or autodissociation and gives cations and anions. The substances which give solvent cations when dissolved in that particular solvent, or increase the concentration of solvent cations, are called acids. Similarly substances which give solvent anions are called bases. Autoionisation of $$H_2O$$ and $$H_2SO_4$$ are as below. Choose the correct statements.

The reaction $$KI+I_2\rightarrow KI_3$$ involves

Crane A and crane B take 1 minute and 2 minutes respectively to lift a car of mass 2 ton, that is 2000 kg, upward through a vertical height $$h=3\,m$$. If the efficiencies of the engines, defined as the ratio of work output to fuel energy input, of both cranes are equal, your inference is that

Two tungsten filament bulbs with rating $$100\,W,200\,V$$ and $$60\,W,200\,V$$ are connected in series with a variable supply of $$0\text{ to }400\,V$$ range, as shown. The supply voltage is gradually increased from $$0\text{ to }400\,V$$. Choose the correct statement(s).

A solid sphere of radius $$R=10\,cm$$ floats in water with $$60\%$$ of its volume submerged. In an oil, this sphere floats with $$80\%$$ of its volume submerged. If the density of water is $$1000\,kg/m^3$$, the correct statement(s) is or are that

A particle starts moving from origin O along x axis. The velocity-time graph of motion of particle is given below. The positive values of v refer to direction of motion along +x axis, and the negative values of v refer to direction of motion along -x direction. Choose the correct statement(s).