VITEEE 2021

When ethanol and \(\mathrm{I}_2\) are heated in the presence of \(\mathrm{Na}_2 \mathrm{CO}_3\), the yellow crystals obtained are of

Phenol on treatment with conc. \(\mathrm{HNO}_3\) gives

Which of the following compounds will be formed when methoxy benzene is reacted with \(\mathrm{HBr}\) ?

Propanal on reaction with lithium aluminium hydride gives

Among the following, the least reactive aldehyde is

\(\mathrm{C}_6 \mathrm{H}_5 \mathrm{COCl} \xrightarrow{\mathrm{NH}_3} X \xrightarrow{\mathrm{P}_2 \mathrm{O}_5} Y \xrightarrow[\mathrm{H}_2]{\mathrm{Ni}} Z\)
the end product in the above sequence of reactions is

Identify B in the following series of reaction
\(\mathrm{CH}_3 \mathrm{CHO} \xrightarrow{\mathrm{CH}_3 \mathrm{MgX}} A \xrightarrow{\mathrm{HOH}} B\)

Which of the following pairs is not correctly matched?

Calculate the wavelength associated with an electron moving with a velocity of \(10^6 \mathrm{~m} / \mathrm{s}\) (mass of electron \(=9.1 \times 10^{-31} \mathrm{~kg}, h=6.6 \times 10^{-34} \mathrm{~kg} \mathrm{~m}^2 \mathrm{~s}^{-1}\) )

What is the total number of electrons that can have the values \(n=2, l=1, s=1 / 2\) in the electronic configuration \(1 s^2 2 s^2 2 p^3\) ?

The orbital diagram in which Aufbau principle is violated is

Which of the following enzymes helps in digestion of proteins?

Nucleic acids are polymers of

Which of the following compounds has maximum acidic character?

Which of the following statements is correct?

Consider the reaction,
\(2 \mathrm{~N}_2 \mathrm{O}_5(g) \longrightarrow 4 \mathrm{NO}_2(g)+\mathrm{O}_2(g)\)
The rate law for this reaction is rate \(=k\left[\mathrm{~N}_2 \mathrm{O}_5\right]\).
Which of the following statements is true re...

Chlorobenzene can be prepared by reacting aniline with

Treatment of aniline with bromine water produces

Which of the following is least reactive to nitration?

Which of the following complexes is square planar and diamagnetic?

Specify the coordination number of cobalt in \(\left[\mathrm{Co}(\mathrm{CN})\left(\mathrm{H}_2 \mathrm{O}\right)(\mathrm{e n})^2\right]^{2+}\)

Which type of isomerism is exhibited by \(\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]\) ?

Electrolysis of an aqueous solution of sodium ethanoate gives

When an electrolytic solution conducts electricity, the current is carried by

An electrochemical cell has two half cell reactions as,
$$\begin{aligned} A^{2+}+2 e^{-} & \longrightarrow A ; E_{A^{2+} / A}^0=0.34 \mathrm{~V} \\ X & \longrightarrow X^{2+}+2 e^{-} ; E_{X^{2+} / X}^0=-2.37 \mathrm{~V} \end{aligned}$$
The ...

The hybridization of carbon atoms in \(\mathrm{C}-\mathrm{C}\) single bond of \(\mathrm{HC} \equiv \mathrm{C}-\mathrm{CH}=\mathrm{CH}_2\) is

Which of the following groups is ortho and para directing?

Identify Z in the following sequence
$$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{I} \xrightarrow{\mathrm{KCN}} X \xrightarrow{\mathrm{H}_3 \mathrm{O}^{+} / \mathrm{H}_2 \mathrm{O}} \mathrm{Y} \xrightarrow[\Delta]{\mathrm{H}_3 \mathrm{O}^{+} / \ma...

The reaction given below is an example of which of the following?
\(2 \mathrm{CH}_3 \mathrm{Br}+2 \mathrm{Na} \xrightarrow{\text { dry ether }} \mathrm{C}_2 \mathrm{H}_6+2 \mathrm{NaBr}\)

The solubility of \(\mathrm{Fe}(\mathrm{OH})_3\) is \(x \mathrm{~mol} \mathrm{~L}^{-1}\). Its \(K_{\mathrm{sp}}\) would be

The \([\mathrm{OH}]^{-}\) in a solution is \(1 \mathrm{~mol} \mathrm{~L}^{-1}\). The \(\mathrm{pH}\) of the solution is

The number of optical isomers of the compound \(\mathrm{CH}_3 \mathrm{CHBrCHBrCOOH}\) is

Which of the following compounds will exhibit cis-trans (geometrical) isomerism?

Which of the following oxides of group 16 has the highest boiling point?

Which of the following statements is not correct?

How does electron affinity change when we move from left to right in a period in the Periodic Table?

When a cation leaves its normal position in the crystal and moves to some interstitial space, the defect in the crystal is known as

A catalyst is a substance which

In thermodynamics, a quantity whose value simply depends upon the initial and final state of the system is called

If \(\Delta H\) and \(\Delta S\) are positive for a reaction, the reaction will be spontaneous only when

The interval in which the function \(f(x)=\sin x-\cos x, 0 \leq x \leq 2 \pi\) is strictly decreasing, is

The slope of normal to the curve \(y=x^3+2 x+6\) which is parallel to line \(x+14 y+4=0\) is

The area bounded by the circle \(x^2+y^2=16\) and the line \(y=x\) in the first quadrant is

Which of the following is the correct principle of Mathematical induction?

The coefficient of the term independent of \(x\) in the expansion \(\left(\frac{x+1}{x^{2 / 3}-x^{1 / 3}+1}-\frac{x-1}{x-x^{1 / 2}}\right)^{10}\) is

The radius of the circle \((x \cos \theta+y \sin \theta-a)^2+(x \sin \theta-y \cos \theta-b)^2=k^2\) is

If \((1+i)(2 i+1)(1+3 i) \ldots(1+n i)=x+i y\), then \(2 \cdot 5 \cdot 10 \ldots\left(1+n^2\right)\) is equal to

The non-zero solutions of the equation \(z^2+|z|=0\), where \(z\) is a complex number, are

The value of \(\int\limits_0^{\pi / 2} \frac{d x}{1+\tan x}\) is

The particular solution of the differential equation \(\frac{d y}{d x}+y \cot x=2 x+x^2 \cot x\), such that \(y(\pi / 2)=0\) is