Identify the incorrect statement for PCl5 from the following.

The correct order of increasing intermolecular hydrogen bond strength is

The correct order of increasing ionic radii is

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

In 3d series, the metal having the highest M2+/M standard electrode potential is :

The 'f' orbitals are half and completely filled, respectively in lanthanide ions : [Given : Atomic no. Eu, 63; Sm, 62; T

Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers : Mn = 25; Fe

Which of the following is most stable?

What will be the major product of following sequence of reactions?

Product 'A' of following sequence of reactions is

Match List-I with List-II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:sol

Decarboxylation of all six possible forms of diaminobenzoic acids C6H3(NH2)2COOH yields three products A, B and C. Three

Given below are two statements. Statement I : Maltose has two $$\alpha$$-D-glucose units linked at C1 and C4 and is a re

Match List I with List II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:sol

116 g of a substance upon dissociation reaction, yields 7.5 g of hydrogen, 60 g of oxygen and 48.5 g of carbon. Given th

Consider the following set of quantum numbers. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:bl

When 5 moles of He gas expand isothermally and reversibly at 300 K from 10 litre to 20 litre, the magnitude of the maxim

A solution containing 2.5 $$\times$$ 10$$-$$3 kg of a solute dissolved in 75 $$\times$$ 10$$-$$3 kg of water boils at 37

pH value of 0.001 M NaOH solution is ____________.

For the reaction taking place in the cell : Pt (s)| H2 (g)|H+(aq) || Ag+(aq) |Ag (s) E$$_{cell}^o$$ = + 0.5332 V. The va

It has been found that for a chemical reaction with rise in temperature by 9 K the rate constant gets doubled. Assuming

0.25 g of an organic compound containing chlorine gave 0.40 g of silver chloride in Carius estimation. The percentage of

The number of points of intersection of $$|z - (4 + 3i)| = 2$$ and $$|z| + |z - 4| = 6$$, z $$\in$$ C, is :

If a1, a2, a3 ...... and b1, b2, b3 ....... are A.P., and a1 = 2, a10 = 3, a1b1 = 1 = a10b10, then a4 b4 is equal to -

If m and n respectively are the number of local maximum and local minimum points of the function $$f(x) = \int\limits_0^

Let f be a differentiable function in $$\left( {0,{\pi \over 2}} \right)$$. If $$\int\limits_{\cos x}^1 {{t^2}\,f(t)dt

The integral $$\int\limits_0^1 {{1 \over {{7^{\left[ {{1 \over x}} \right]}}}}dx} $$, where [ . ] denotes the greatest i

If the solution curve of the differential equation $$(({\tan ^{ - 1}}y) - x)dy = (1 + {y^2})dx$$ passes through the poin

If the equation of the parabola, whose vertex is at (5, 4) and the directrix is $$3x + y - 29 = 0$$, is $${x^2} + a{y^2}

The set of values of k, for which the circle $$C:4{x^2} + 4{y^2} - 12x + 8y + k = 0$$ lies inside the fourth quadrant an

The shortest distance between the lines $${{x - 3} \over 2} = {{y - 2} \over 3} = {{z - 1} \over { - 1}}$$ and $${{x + 3

Let $$\overrightarrow a $$ and $$\overrightarrow b $$ be the vectors along the diagonals of a parallelogram having area

The mean and variance of the data 4, 5, 6, 6, 7, 8, x, y, where x

If a point A(x, y) lies in the region bounded by the y-axis, straight lines 2y + x = 6 and 5x $$-$$ 6y = 30, then the pr

The value of $$\cot \left( {\sum\limits_{n = 1}^{50} {{{\tan }^{ - 1}}\left( {{1 \over {1 + n + {n^2}}}} \right)} } \rig

$$\alpha = \sin 36^\circ $$ is a root of which of the following equation?

Let S = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. Define f : S $$\to$$ S as $$f(n) = \left\{ {\matrix{ {2n} & , & {if\,n = 1,2

Let $$\alpha$$, $$\beta$$ be the roots of the equation $${x^2} - 4\lambda x + 5 = 0$$ and $$\alpha$$, $$\gamma$$ be the

Let A be a matrix of order 2 $$\times$$ 2, whose entries are from the set {0, 1, 2, 3, 4, 5}. If the sum of all the entr

Let [t] denote the greatest integer $$\le$$ t and {t} denote the fractional part of t. The integral value of $$\alpha$$

If $$y(x) = {\left( {{x^x}} \right)^x},\,x > 0$$, then $${{{d^2}x} \over {d{y^2}}} + 20$$ at x = 1 is equal to _________

If the area of the region $$\left\{ {(x,y):{x^{{2 \over 3}}} + {y^{{2 \over 3}}} \le 1,\,x + y \ge 0,\,y \ge 0} \right\}

Let $$y = y(x)$$ be the solution of the differential equation $$(1 - {x^2})dy = \left( {xy + ({x^3} + 2)\sqrt {1 - {x^2}

Let S = {E1, E2, ........., E8} be a sample space of a random experiment such that $$P({E_n}) = {n \over {36}}$$ for eve

The SI unit of a physical quantity is pascal-second. The dimensional formula of this quantity will be :

The distance of the Sun from earth is 1.5 $$\times$$ 1011 m and its angular diameter is (2000) s when observed from the

When a ball is dropped into a lake from a height 4.9 m above the water level, it hits the water with a velocity v and th

One end of a massless spring of spring constant k and natural length l0 is fixed while the other end is connected to a s

A stone tide to a spring of length L is whirled in a vertical circle with the other end of the spring at the centre. At

Four spheres each of mass m from a square of side d (as shown in figure). A fifth sphere of mass M is situated at the ce

For a perfect gas, two pressures P1 and P2 are shown in figure. The graph shows :

According to kinetic theory of gases, A. The motion of the gas molecules freezes at 0$$^\circ$$C. B. The mean free path

A lead bullet penetrates into a solid object and melts. Assuming that 40% of its kinetic energy is used to heat it, the

The equation of a particle executing simple harmonic motion is given by $$x = \sin \pi \left( {t + {1 \over 3}} \right)m

If a charge q is placed at the centre of a closed hemispherical non-conducting surface, the total flux passing through t

Three identical charged balls each of charge 2 C are suspended from a common point P by silk threads of 2 m each (as sho

Two long parallel conductors S1 and S2 are separated by a distance 10 cm and carrying currents of 4A and 2A respectively

If L, C and R are the self inductance, capacitance and resistance respectively, which of the following does not have the

Given below are two statements : Statement I : A time varying electric field is a source of changing magnetic field and

A convex lens has power P. It is cut into two halves along its principal axis. Further one piece (out of the two halves)

If a wave gets refracted into a denser medium, then which of the following is true?

Given below are two statements : Statement I : In hydrogen atom, the frequency of radiation emitted when an electron jum

A mass of 10 kg is suspended vertically by a rope of length 5 m from the roof. A force of 30 N is applied at the middle

A rolling wheel of 12 kg is on an inclined plane at position P and connected to a mass of 3 kg through a string of fixed

A diatomic gas ($$\gamma$$ = 1.4) does 400J of work when it is expanded isobarically. The heat given to the gas in the p

A particle executes simple harmonic motion. Its amplitude is 8 cm and time period is 6 s. The time it will take to trave

A parallel plate capacitor is made up of stair like structure with a plate area A of each stair and that is connected wi

The current density in a cylindrical wire of radius r = 4.0 mm is 1.0 $$\times$$ 106 A/m2. The current through the outer

In the given circuit 'a' is an arbitrary constant. The value of m for which the equivalent circuit resistance is minimum

A deuteron and a proton moving with equal kinetic energy enter into a uniform magnetic field at right angle to the field

A metallic rod of length 20 cm is placed in North-South direction and is moved at a constant speed of 20 m/s towards Eas

The cut-off voltage of the diodes (shown in figure) in forward bias is 0.6 V. The current through the resister of 40 $$\