NSEJS 2022 27th Nov Question Paper

In nineteenth century, farmers in Japan found that some seedlings of rice became very tall. They called it Bakane Disease or mad seedling disease. All these mad plants were found to be infected by a fungus, Fusarium moniliforme. This led to the discovery of a phytohormone, later named

In most angiosperms, when the ovule is mature, the pollen germinates on stigma, travels through style and ultimately enters the ovule. In the adjacent diagram, three possibilities of pollen tube entry are shown. What do A, B and C represent

It is a common observation that members of Cucurbitaceae, like bottle-gourd, pumpkin, watermelon and musk melon, have large fruits while their stems are usually not more than a finger thick. What helps so much food to be translocated from leaves to the fruits for storage

In some birds, black plumage gene is dominant over white plumage gene. One black bird was mated with white feathered bird. It resulted in all chicks with blue plumage. Selfing among these blue birds would result in

The adjacent diagram shows chromatographic separation of plant pigments extracted from spinach leaves. The sequence of pigment bands from below upwards is

In some plants and fungi, some cell organelles are found which convert lipids to sugar in early stages of oil seed germination. What are these

In the analysis of waste water, Escherichia coli is used as

Acid rain damages soil and lakes. Its high level depositions have damaged high altitude forests since being encircled by acidic fogs and clouds. It also affects aquatic plants and animals. Which pH range is most suitable for the survival of aquatic biota

Steroid hormones include sex hormones and hormones from adrenal cortex. Based on the intensity of action which of the following ovarian hormones is produced in large amount

In the vertebrae column of man, there are about 26 vertebrae. Which of the following vertebrae is related with the pelvis region

In the following EMP pathway, enzymes catalyzing the reactions are numbered E1 to E10. At which enzyme levels are ATPs generated at substrate level

A thick whitish band of semicircular nerve fibres is found bulging upon the inner surface of the dorsal wall of each cerebral hemisphere of mammalian brain. Choose the name of this structure from the following

In animal classification, symmetry of body is a diagnostic feature. Besides truly bilateral symmetrical animals, exceptionally some other animals also exhibit bilateral symmetry. Which of the following is an example of such animals

Nissl$$'$$s granules are in fact RNA bodies. In which of the following do they occur

One of the following statements is not applicable to viruses

Carolus Linnaeus, a Swedish botanist is credited with Binomial Nomenclature of plants and animals. While using binomials, he devised a system of classification of plants. His classification is

Which bond will break when the following compound is dissolved in water

If the number of compounds formed by H, C, Cl and Co are N1, N2, N3 and N4 respectively, then the correct order is

Heaviest nuclide which does not show radioactive nature is

$$1$$ kg of aqueous urea solution with (mole fraction of solute equal to $$0.2$$) is diluted to $$5$$ kg. Mole fraction of solute in the diluted solution is

Nickel forms a gaseous compound of the formula $$Ni(CO)_x$$. What is the value of $$x$$ if under similar conditions of temperature and pressure, methane effuses $$3.24$$ times faster than the compound. 

(For Ni, $$M = 58.7$$)

Inter-particle distance between Li and H in LiH is $$1.596\,\text{A}$$. Observed dipole moment of LiH is $$1.964 \times 10^{-29}\,\text{C m}$$. The percentage ionic character in LiH is

What is the percentage of $$MgCO_3$$ in a mixture of $$MgCO_3$$ and $$CaCO_3$$ if $$2$$ g of the mixture requires $$2$$ g of $$H_2SO_4$$ for complete neutralization

Sum of oxidation states of all the carbon atoms in toluene molecule is

Oxidation state of oxygen in $$O_2PtF_6$$ is

When attacked by $$Br_2$$, which H-atom will be replaced most readily

Consider the molecules having formula $$C_{10}H_{16}$$. Which of the following structural features are not possible within this set of molecules

Which metal adsorbs hydrogen to large extent

Among the following the compound which is both paramagnetic and coloured is

A mixture of $$HCOOH$$ and $$H_2C_2O_4$$ is heated with concentrated $$H_2SO_4$$. The gases produced were passed through KOH solution where their volume decreased by $$\frac{1}{6}$$. Ratio of two acids in the mixture is

The correct order of energy levels in H-atom is

$$X_3$$ and $$Y_2$$, when reacted with $$A$$ and $$B$$ in aqueous solution, give a brown colour. These are separated by a semipermeable membrane as shown in the figure. Assuming that electrolytes are completely ionized in solution, then due to osmosis there is

A particle of mass $$0.3\,\text{kg}$$ starts moving from rest, in one dimension, under a force that delivers constant power $$P=1.5\,\text{W}$$. The kinetic energy of the particle will be $$15\,\text{J}$$ after a time of

A trolley of mass $$200\,\text{kg}$$ carrying a sandbag of mass $$20\,\text{kg}$$ is moving on a frictionless horizontal track with speed $$36\,\text{km h}^{-1}$$. After a while, sand starts leaking out of the bag on the floor of trolley at the rate $$0.04\,\text{kg s}^{-1}$$. What is the speed of trolley after the entire sand bag is empty

A particle, initially at rest at origin, starts moving under acceleration $$a$$ along the positive $$x$$ direction. The acceleration versus time graph is shown in the figure. The displacement and the velocity of the particle after $$6\,\text{s}$$ are

Gravitational potential energy of a system of two particles of masses $$m_1$$ and $$m_2$$, separated by distance $$r$$, is given by $$U=-\frac{Gm_1m_2}{r}$$. Consider two stars, each of mass $$M$$, initially separated by distance $$d$$ and at rest with respect to each other. The stars start moving towards each other under their mutual gravitational attraction. The stars can be treated as point objects and motion is assumed non-relativistic. As measured from the laboratory frame, the speed of each star when they are at a distance $$d/2$$ apart from each other is

An engine approaches a vertical cliff with constant speed $$72\,\text{km h}^{-1}$$. When the engine is at a distance of $$0.7\,\text{km}$$ from the cliff, it blows a whistle. The driver hears the echo after a time. The speed of sound in air is $$330\,\text{m s}^{-1}$$.
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A vessel contains a liquid 1 of density $$0.8\,\text{g cm}^{-3}$$ over a liquid 2 of density $$13.6\,\text{g cm}^{-3}$$. The two liquids are immiscible. A homogeneous solid sphere floats with half of its volume immersed in liquid 1 and the other half in liquid 2. The density of the material of the sphere in $$\text{g cm}^{-3}$$ is

One fine morning, Mr. Ravi visited Gandhi park with his grandson. When he was just on a bridge over the lake in the park, an old wooden toy dropped from his hand. The toy went straight down to hit the surface of calm water, then sank into water to a certain depth below water surface and returned back due to upthrust of water to the hands of Mr. Ravi in the same position from where it was dropped. Assuming this position to be at height $$19.6\,\text{m}$$ above the surface of water, and density of material of toy to be just half the density of water in lake, the total time in which toy is received back to the hand of Mr.Ravi is calculated to be

Two plane mirrors OA and OB are inclined at an angle $$\theta$$ as shown in the figure. A ray of light incident parallel to BO strikes the mirror OA at point P. It gets reflected from mirror OA and then reflected from mirror OB, the ray finally emerges parallel to OA. The value of angle $$\theta$$ is

A long solenoid of length $$2\,\text{m}$$ and radius $$10\,\text{cm}$$ having $$2000$$ turns per meter carries a current of $$1.0\,\text{A}$$. The strength of magnetic field $$B$$ is maximum at point

A tank with a square base of area $$2.0\,\text{m}^2$$ is divided by a vertical partition in the middle. The bottom of the partition has a small hinged door of area $$10\,\text{cm}^2$$. The tank is filled with water in one compartment and a liquid of relative density $$1.8$$ in the other compartment, both to a height $$5.0\,\text{m}$$. The force necessary to keep the door close is approximately. Take $$g=9.8\,\text{m s}^{-2}$$.

An electron is projected horizontally towards east in uniform magnetic field $$B$$. The electron is deflected towards north by the magnetic field. The magnetic field is directed

Sir C V Raman announced the discovery of Raman Effect on February 28, 1928. He received the 1930 Nobel Prize in Physics for this discovery. Raman Effect is the discovery of

Figures (i) to (v) show graphical representation of motion in one dimension. Here $$s$$, $$v$$, $$a$$ and $$t$$ represent displacement, velocity, acceleration and time respectively. Which of the above graphs represent uniform motion

Three identical electric bulbs A, B and C having specification $$60\,\text{W}, 220\,\text{V}$$ are connected across a $$220\,\text{V}$$ supply as shown.

The total power dissipated in three bulbs is close to

A copper wire is stretched to decrease its radius by $$0.15\%$$. The percentage change in the resistance of wire is

Speed of sound in air is directly proportional to the square root of absolute temperature of air, keeping other parameters constant. The speed of sound in air at $$273\,\text{K}$$ and $$1\,\text{atm}$$ is $$332\,\text{m s}^{-1}$$. On a clear day, when temperature in the laboratory was $$27^\circ\text{C}$$, an experiment was performed to measure speed of sound in air. The measured value comes out to be $$352\,\text{m s}^{-1}$$. The percentage error in this measurement is

Which of the following evolutionary lineages of man can be categorized under pre-historic man

Select the set of diseases caused by deficiency of B-Complex Vitamins

After rainy season, a Biology teacher took the students on a plant collection tour. From a pond, they collected a beaker of water with aquatic plants in it. The students are likely to find which of the following organisms in it

Various parts of mammalian uriniferous tubules (nephrons), play an important role in Urine formation through processes like ultrafiltration, selective reabsorption by active transport, reabsorption by passive osmosis and secretion. While the filtrate flows through different parts of the uriniferous tubules (Numbered 1 - 6 in the diagram given below), not only its volume is reduced but its composition is also considerably changed, due to exchange of materials between the filtrate and the blood of the peritubular capillaries.

From among the numbered parts (1 - 6) in the above diagram, the options are given in a manner that they highlight two aspects separately, i.e., part(s) having columnar epithelial cells with 'brush border', suitable for reabsorption and those parts completely or poorly permeable to water. Select-out the desired options:

The $$0.01\,\text{M}$$ $$NH_4Cl$$ solution at $$25^\circ\text{C}$$ has

Amphoteric nature of $$Al_2O_3$$ is employed in which of the following processes

As a general trend the First Ionization Energy $$IE_1$$ of elements decreases on moving down in a group in the periodic table. Keeping the observation in mind select the correct order of elements with respect to their $$IE_1$$.
I. Li>Na>K>Rb>Cs>Fr
II. Li>Na>K>Rb>Cs<Fr
III. Sr<Ba>Ra
IV. Sr>Ba<Ra
V. Cu>Ag>Au
VI. Cu>Ag<Au
VII. Cd>Hg
VIII. Cd<Hg

Two containers each containing water in liquid state are connected by a valve as shown in the diagram. Given that vapour pressure of water at $$300\,\text{K}$$ and $$350\,\text{K}$$ are $$22$$ torr and $$40$$ torr, select the correct statements

Two blocks $$M_1$$ and $$M_2$$ of masses $$3\,\text{kg}$$ and $$6\,\text{kg}$$ respectively are connected through a string and spring balance $$B_1$$. The string passes over a massless and frictionless pulley $$P$$. The pulley is suspended from a rigid support through spring balance $$B_2$$. Strings are massless and inextensible. The system is released from rest. At the instant when masses $$M_1$$ and $$M_2$$ are moving with the same speed, take $$g=9.8\,\text{m s}^{-2}$$.

Focal length of a thin convex lens is $$10\,\text{cm}$$. An object is placed at a distance $$15\,\text{cm}$$ in front of the lens and a plane mirror is kept at $$20\,\text{cm}$$ on the other side as shown in the figure.

Given network of $$18$$ resistors, each equal to $$R=3\,\Omega$$, is connected in series with resistor $$R_0$$ to a source of emf $$9\,\text{V}$$. Choose the correct options.

Two bodies of masses $$m_1=2\,\text{kg}$$ and $$m_2=1\,\text{kg}$$ are moving towards each other in the same straight line with speed $$12\,\text{m s}^{-1}$$ and $$6\,\text{m s}^{-1}$$ respectively as shown in the figure. The bodies can be assumed as point masses. After some time, the two bodies undergo elastic collision. After the collision