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Which one of the following molecules contains no $\pi$ bond?

What is the hybridization and geometry of $S{F}_4$ ?

Equilibrium constant of $T_{2}O$ (T or ${}_1^{3}H$ is an isotope of ${}_1^{1}H$) and $H_{2}O$ are different at 298 K. At 298 K, pure $T_{2}O$ has pT (like pH) of 7.62. The pT of a solution prepared by adding 10 mL of 0.2 M $TCl$ to 15 mL of 0.25 M $NaOT$ is:

'$C-C$' bond length in benzene lies between single and double bond.The reason is

The volume of water needed to dissolve $1\text{mg}$ of $PbS{O}_4(K_{sp}=1.44\times {10}^{-8}{M}^2)$ at $25{}^{\circ }\text{C}$ is approximately:

(molar mass of $Pb=207\text{g/mol}$)

Calculate the energy associated with photon of light having a wavelength 6000 $\stackrel{o}{A}$. [h= $6.626\times {10}^{-27}ergs$]

A permissible solution to the schrodigner wave equation gave an idea of _____ quantum numbers.

An electric current is passed through an aqueous solution (buffered at pH = 6.0) of alanine (pl - 6.0) and ariginine (pl = 10.2). The two amino acids can be separated because ?

Which of the following combinations of ions will have the highest polarisation?

Calculate the wavelength of a photon that is emitted when an electron in the Bohr orbit $n=2$ returns to the orbit $n=1$ in a $H{e}^{+}$ ion.

The ionisation potential of the ground state $H{e}^{+}$ ion is $8.68\times {10}^{-11}\text{erg per atom}$.

The correct order of ionic radii for $Y^{3+},E{u}^{3+},L{a}^{3+},L{u}^{3+}$

Which of these following will be in increasing order in the modern periodic table?

A sample of aluminium has a mass of 54.0 g. What is the mass of the same number of magnesium atoms:

(At. wt. Al = 27 u, Mg = 24 u)

What is common for H+, D+ and T+

The correct order of decreasing polarizability of ion is _____.

Nitric acid $\left(HN{O}_3\right),$ also known as aqua fortis (Latin for "strong water") or spirit of niter, is a highly corrosive mineral acid. Nitric acid reacts with most metals, but the details depend on the concentration of the acid and the nature of the metal.



List-I contains chemical reactions of metals with $HN{O}_3$ and List-II contains the compound(s) formed.



$\begin{array}{ccccc}& List-I& & List-II& \\ \left(I\right)& \text{Ca with dilute and cold}HN{O}_3& \left(P\right)& \text{Metal nitrate}& \\ \left(II\right)& \text{As with concentrated}HN{O}_3& \left(Q\right)& NO& \\ \left(III\right)& \text{Zn with dilute}HN{O}_3& \left(R\right)& N{O}_2& \\ \left(IV\right)& \text{Cu with dilute}HN{O}_3& \left(S\right)& N_{2}O& \\ & & \left(T\right)& \text{Tribasic acid}& \\ & & \left(U\right)& \text{Hydrogen gas}& \end{array}$



Which of the following options has the correct combination considering List-I and List-II?

The variation of amount of gas absorbed per gram of adsorbent with pressure at different temperatures is given in the adjoining fig. Which of the following is correct relation?

Which one of the following compound gives aspirin on reacting with acetic anhydride in presence of $H_{2}S{O}_4$

How much $N{H}_3$ will be left unreacted if 1.0 kg of $N{H}_3$ reacts with 2.5 kg of $O_2$ and 3 kg of $C{H}_4$ in the following reaction:

$2C{H}_4+3O_2+2N{H}_3\to 2HCN+6H_{2}O$

The first member of the ester homologous series is?

At 373 K, steam and water are in equilibrium and ${△}_{vap}H=40.98kJmo{l}^{-1}.$ What will be entropy change for conversion of water into steam?

$H_2{O}_{\left(l\right)}\to H_2{O}_{\left(g\right)}$

Which of the following processes is not a physical process of separation?

A sub-shell of $l$ has _____ angular nodes.

Consider $aM$ of $N{H}_3\left(aq\right)$ is present in a solution containing $AgCl$ and $x$ is the solublity of $AgCl$ in this solution.

Given: $K_f$ is the formation constant of $\left[Ag\right(N{H}_3{)}_2{]}^{+}$,

$K_{sp}$ is the solubility product of $AgCl$.

Which of the following relation is correct.

An element, which never has a positive oxidation state in any of its compounds is:

In the compound $C{H}_3-CH=CH-C{H}_2-C\equiv CH$, the hybridisation of C₁, C₃ and C₅ bonds respectively is

In an electrolytic cell, oxidation happens at __

The solution of $\frac{x^{3}dx+y{x}^{2}dy}{\sqrt{x^2+y^2}}=ydx-xdy$, $y\left(1\right)=1$ is

which of the following is the tranquiliser ?

The rate of effusion of LPG (a mixture of n-butane and propane) is 1.25 times that of $S{O}_3$. Hence, mass fraction of n-butane in LPG is :

ASSERTION(A): For every chemical reaction at equilibrium, standard Gibbs energy of the reaction is zero.

REASON(R): At constant temperature and pressure, chemical reactions are spontaneous in the direction of the decreasing Gibbs energy.

Which one of the following will have the largest number of atoms? $($Molar mass of $Au=197g/mol)$

$S_{N}1$ solvolysis of 4-bromopent-2-ene in ethanol gives:

In a solid lattice, cation and an anion both have left lattice site. The lattice defect is known as

Calculate the number of formula units of $N{a}_{2}S{O}_4$ in $\frac{4}{9}$ millimoles of a pure sample of $N{a}_{2}S{O}_4$.

Work function of a metal is 3eV. An electromagnetic radiation of 200 nm is incident on metal surface, calculate the maximum speed of photoelectrons ejected. (Take the value of h= $6.6\times {10}^{-34}Js)$

Which one of the following is a bicyclic saturated hydrocarbon?

The rusting of iron takes place as follows $2H^{+}+2e^{-}+\frac{1}{2}{O}_2\to H_{2}O\left(l\right);E^{\circ }=+1.23V$ $F{e}^{2+}+2e^{-}\to Fe\left(s\right);E^{\circ }=-0.44V$ Calculate $\Delta G^{\circ }$ for the net process

Photochemical smog consists of an excessive amount of X, in addition to aldehydes, ketones and peroxyacetylnitrates (PAN). X is:

Consider the reactions

$\left(i\right)CO\left(g\right)+H_{2}O\left(g\right)\rightleftharpoons C{O}_2\left(g\right)+H_2\left(g\right);K_1\left(ii\right)C{H}_4\left(g\right)+H_{2}O\left(g\right)\rightleftharpoons CO\left(g\right)+3H_2\left(g\right);K_2\left(iii\right)C{H}_4\left(g\right)+2H_{2}O\left(g\right)\rightleftharpoons C{O}_2\left(g\right)+4H_2\left(g\right);K_3$

which of the following is correct?