Two nucleotides are joined together by a linkage known as :

Highest enol content will be shown by:

Element not showing variable oxidation state is :

Which of the following is strongest Bronsted base?

Which of the following electronic configuration would be associated with the highest magnetic moment?

Which of the following has highly acidic hydrogen?

A solution of two miscible liquids showing negative deviation from Raoult's law will have :

Consider the following complex ions

$$\begin{aligned} & \mathrm{P}=\left[\mathrm{FeF}_6\right]^{3-} \\ & \mathrm{Q}=\left[\mathrm{V}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+} \\ & \mathrm{R}=\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+} \end{aligned}$$

The correct order of the complex ions, according to their spin only magnetic moment values (in B.M.) is :

Choose the polar molecule from the following:

Given below are two statements :

Statement (I) : The $4 \mathrm{f}$ and $5 \mathrm{f}$ - series of elements are placed separately in the Periodic table to preserve the principle of classification.

Statement (II) : S-block elements can be found in pure form in nature.

In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements :

Statement (I) : p-nitrophenol is more acidic than m-nitrophenol and o-nitrophenol.

Statement (II) : Ethanol will give immediate turbidity with Lucas reagent.

In the light of the above statements, choose the correct answer from the options given below :

The ascending order of acidity of $-\mathrm{OH}$ group in the following compounds is :

Choose the correct answer from the options given below:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Melting point of Boron (2453 K) is unusually high in group 13 elements.

Reason (R) : Solid Boron has very strong crystalline lattice.

In the light of the above statements, choose the most appropriate answer from the options given below ;

Cyclohexene

is ________ type of an organic compound.

Yellow compound of lead chromate gets dissolved on treatment with hot $\mathrm{NaOH}$ solution. The product of lead formed is a :

Given below are two statements :

Statement (I) : Aqueous solution of ammonium carbonate is basic.

Statement (II) : Acidic/basic nature of salt solution of a salt of weak acid and weak base depends on $K_a$ and $K_b$ value of acid and the base forming it.

In the light of the above statements, choose the most appropriate answer from the options given below :

IUPAC name of following compound (P) is:

$\mathrm{NaCl}$ reacts with conc. $\mathrm{H}_2 \mathrm{SO}_4$ and $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ to give reddish fumes (B), which react with $\mathrm{NaOH}$ to give yellow solution (C). (B) and (C) respectively are ;

The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is ;

The electronic configuration for Neodymium is:

[Atomic Number for Neodymium 60]

The mass of silver (Molar mass of $\mathrm{Ag}: 108 \mathrm{~gmol}^{-1}$ ) displaced by a quantity of electricity which displaces $5600 \mathrm{~mL}$ of $\mathrm{O}_2$ at S.T.P. will be ______ g.

Consider the following data for the given reaction

$2 \mathrm{HI}_{(\mathrm{g})} \rightarrow \mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})}$

The order of the reaction is _________.

Mass of methane required to produce $22 \mathrm{~g}$ of $\mathrm{CO}_2$ after complete combustion is _______ g.

(Given Molar mass in g mol-1 $\mathrm{C}=12.0$, $\mathrm{H}=1.0$, $\mathrm{O}=16.0)$

If three moles of an ideal gas at $300 \mathrm{~K}$ expand isotherrnally from $30 \mathrm{~dm}^3$ to $45 \mathrm{~dm}^3$ against a constant opposing pressure of $80 \mathrm{~kPa}$, then the amount of heat transferred is _______ J.

3-Methylhex-2-ene on reaction with $\mathrm{HBr}$ in presence of peroxide forms an addition product (A). The number of possible stereoisomers for '$\mathrm{A}$' is ________.

Among the given organic compounds, the total number of aromatic compounds is

Among the following, total number of meta directing functional groups is (Integer based)

$-\mathrm{OCH}_3,-\mathrm{NO}_2,-\mathrm{CN},-\mathrm{CH}_3-\mathrm{NHCOCH}_3, -\mathrm{COR},-\mathrm{OH},-\mathrm{COOH},-\mathrm{Cl}$

The number of electrons present in all the completely filled subshells having $\mathrm{n}=4$ and $\mathrm{s}=+\frac{1}{2}$ is _______.

(Where $\mathrm{n}=$ principal quantum number and $\mathrm{s}=$ spin quantum number)

Sum of bond order of CO and NO$^+$ is ________.

From the given list, the number of compounds with +4 oxidation state of Sulphur ________.

$$\mathrm{SO}_3, \mathrm{H}_2 \mathrm{SO}_3, \mathrm{SOCl}_2, \mathrm{SF}_4, \mathrm{BaSO}_4, \mathrm{H}_2 \mathrm{S}_2 \mathrm{O}_7$$

Position of an ant ($\mathrm{S}$ in metres) moving in $\mathrm{Y}$-$\mathrm{Z}$ plane is given by $S=2 t^2 \hat{j}+5 \hat{k}$ (where $t$ is in second). The magnitude and direction of velocity of the ant at $\mathrm{t}=1 \mathrm{~s}$ will be :

Given below are two statements :

Statement (I) :Viscosity of gases is greater than that of liquids.

Statement (II) : Surface tension of a liquid decreases due to the presence of insoluble impurities.

In the light of the above statements, choose the most appropriate answer from the options given below :

If the refractive index of the material of a prism is $\cot \left(\frac{A}{2}\right)$, where $A$ is the angle of prism then the angle of minimum deviation will be

A proton moving with a constant velocity passes through a region of space without any change in its velocity. If $\overrightarrow{\mathrm{E}}$ and $\overrightarrow{\mathrm{B}}$ represent the electric and magnetic fields respectively, then the region of space may have :

(A) $\mathrm{E}=0, \mathrm{~B}=0$

(B) $\mathrm{E}=0, \mathrm{~B} \neq 0$

(C) $\mathrm{E} \neq 0, \mathrm{~B}=0$

(D) $\mathrm{E} \neq 0, \mathrm{~B} \neq 0$

Choose the most appropriate answer from the options given below :

The acceleration due to gravity on the surface of earth is $\mathrm{g}$. If the diameter of earth reduces to half of its original value and mass remains constant, then acceleration due to gravity on the surface of earth would be :

A train is moving with a speed of $12 \mathrm{~m} / \mathrm{s}$ on rails which are $1.5 \mathrm{~m}$ apart. To negotiate a curve radius $400 \mathrm{~m}$, the height by which the outer rail should be raised with respect to the inner rail is (Given, $g=10 \mathrm{~m} / \mathrm{s}^2)$ :

Which of the following circuits is reverse - biased?

Identify the physical quantity that cannot be measured using spherometer :

Two bodies of mass $4 \mathrm{~g}$ and $25 \mathrm{~g}$ are moving with equal kinetic energies. The ratio of magnitude of their linear momentum is :

$0.08 \mathrm{~kg}$ air is heated at constant volume through $5^{\circ} \mathrm{C}$. The specific heat of air at constant volume is $0.17 \mathrm{~kcal} / \mathrm{kg}^{\circ} \mathrm{C}$ and $\mathrm{J}=4.18$ joule/$\mathrm{~cal}$. The change in its internal energy is approximately.

The radius of third stationary orbit of electron for Bohr's atom is R. The radius of fourth stationary orbit will be:

A rectangular loop of length $2.5 \mathrm{~m}$ and width $2 \mathrm{~m}$ is placed at $60^{\circ}$ to a magnetic field of $4 \mathrm{~T}$. The loop is removed from the field in $10 \mathrm{~sec}$. The average emf induced in the loop during this time is

An electric charge $10^{-6} \mu \mathrm{C}$ is placed at origin $(0,0)$ $\mathrm{m}$ of $\mathrm{X}-\mathrm{Y}$ co-ordinate system. Two points $\mathrm{P}$ and $\mathrm{Q}$ are situated at $(\sqrt{3}, \sqrt{3}) \mathrm{m}$ and $(\sqrt{6}, 0) \mathrm{m}$ respectively. The potential difference between the points \mathrm{P}$ and $\mathrm{Q} will be :

A convex lens of focal length $40 \mathrm{~cm}$ forms an image of an extended source of light on a photoelectric cell. A current I is produced. The lens is replaced by another convex lens having the same diameter but focal length $20 \mathrm{~cm}$. The photoelectric current now is :

A body of mass $1000 \mathrm{~kg}$ is moving horizontally with a velocity $6 \mathrm{~m} / \mathrm{s}$. If $200 \mathrm{~kg}$ extra mass is added, the final velocity (in $\mathrm{m} / \mathrm{s}$) is:

A plane electromagnetic wave propagating in $\mathrm{x}$-direction is described by

$E_y=\left(200 \mathrm{Vm}^{-1}\right) \sin \left[1.5 \times 10^7 t-0.05 x\right] \text {; }$

The intensity of the wave is :

(Use $\epsilon_0=8.85 \times 10^{-12} \mathrm{C}^2 \mathrm{~N}^{-1} \mathrm{~m}^{-2}$)

Given below are two statements :

Statement (I) : Planck's constant and angular momentum have same dimensions.

Statement (II) : Linear momentum and moment of force have same dimensions.

In the light of the above statements, choose the correct answer from the options given below :

A wire of length $10 \mathrm{~cm}$ and radius $\sqrt{7} \times 10^{-4} \mathrm{~m}$ connected across the right gap of a meter bridge. When a resistance of $4.5 \Omega$ is connected on the left gap by using a resistance box, the balance length is found to be at $60 \mathrm{~cm}$ from the left end. If the resistivity of the wire is $\mathrm{R} \times 10^{-7} \Omega \mathrm{m}$, then value of $\mathrm{R}$ is :

A wire of resistance $\mathrm{R}$ and length $\mathrm{L}$ is cut into 5 equal parts. If these parts are joined parallely, then resultant resistance will be :

The average kinetic energy of a monatomic molecule is $0.414 \mathrm{~eV}$ at temperature :

(Use $K_B=1.38 \times 10^{-23} \mathrm{~J} / \mathrm{mol}-\mathrm{K}$)

A particle starts from origin at $t=0$ with a velocity $5 \hat{i} \mathrm{~m} / \mathrm{s}$ and moves in $x-y$ plane under action of a force which produces a constant acceleration of $(3 \hat{i}+2 \hat{j}) \mathrm{m} / \mathrm{s}^2$. If the $x$-coordinate of the particle at that instant is $84 \mathrm{~m}$, then the speed of the particle at this time is $\sqrt{\alpha} \mathrm{~m} / \mathrm{s}$. The value of $\alpha$ is _________.

A thin metallic wire having cross sectional area of $10^{-4} \mathrm{~m}^2$ is used to make a ring of radius $30 \mathrm{~cm}$. A positive charge of $2 \pi \mathrm{~C}$ is uniformly distributed over the ring, while another positive charge of 30 $\mathrm{pC}$ is kept at the centre of the ring. The tension in the ring is ______ $\mathrm{N}$; provided that the ring does not get deformed (neglect the influence of gravity). (given, $\frac{1}{4 \pi \epsilon_0}=9 \times 10^9$ SI units)

Two coils have mutual inductance $0.002 \mathrm{~H}$. The current changes in the first coil according to the relation $\mathrm{i}=\mathrm{i}_0 \sin \omega \mathrm{t}$, where $\mathrm{i}_0=5 \mathrm{~A}$ and $\omega=50 \pi$ rad/s. The maximum value of emf in the second coil is $\frac{\pi}{\alpha} \mathrm{~V}$. The value of $\alpha$ is _______.

Two immiscible liquids of refractive indices $\frac{8}{5}$ and $\frac{3}{2}$ respectively are put in a beaker as shown in the figure. The height of each column is $6 \mathrm{~cm}$. A coin is placed at the bottom of the beaker. For near normal vision, the apparent depth of the coin is $\frac{\alpha}{4} \mathrm{~cm}$. The value of $\alpha$ is _________.

In a nuclear fission process, a high mass nuclide $(A \approx 236)$ with binding energy $7.6 \mathrm{~MeV} /$ Nucleon dissociated into middle mass nuclides $(\mathrm{A} \approx 118)$, having binding energy of $8.6 \mathrm{~MeV} / \mathrm{Nucleon}$. The energy released in the process would be ______ $\mathrm{MeV}$.

Four particles each of mass $1 \mathrm{~kg}$ are placed at four corners of a square of side $2 \mathrm{~m}$. Moment of inertia of system about an axis perpendicular to its plane and passing through one of its vertex is _____ $\mathrm{kgm}^2$.

A particle executes simple harmonic motion with an amplitude of $4 \mathrm{~cm}$. At the mean position, velocity of the particle is $10 \mathrm{~cm} / \mathrm{s}$. The distance of the particle from the mean position when its speed becomes $5 \mathrm{~cm} / \mathrm{s}$ is $\sqrt{\alpha} \mathrm{~cm}$, where $\alpha=$ ________.

Two long, straight wires carry equal currents in opposite directions as shown in figure. The separation between the wires is $5.0 \mathrm{~cm}$. The magnitude of the magnetic field at a point $\mathrm{P}$ midway between the wires is _______ $\mu \mathrm{T}$

(Given : $\mu_0=4 \pi \times 10^{-7} \mathrm{TmA}^{-1}$)

The charge accumulated on the capacitor connected in the following circuit is _______ $\mu \mathrm{C}$ (Given $\mathrm{C}=150 \mu \mathrm{F})$

If average depth of an ocean is $4000 \mathrm{~m}$ and the bulk modulus of water is $2 \times 10^9 \mathrm{~Nm}^{-2}$, then fractional compression $\frac{\Delta V}{V}$ of water at the bottom of ocean is $\alpha \times 10^{-2}$. The value of $\alpha$ is _______ (Given, $\mathrm{g}=10 \mathrm{~ms}^{-2}, \rho=1000 \mathrm{~kg} \mathrm{~m}^{-3}$)