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The smog is essentially caused by the presence of

When the following redox reaction

$C{l}_2+O{H}^{-}\to Cl{O}_3^{-}+C{l}^{-}+H_{2}O$

is balanced by ion-electron method , what will be the coefficient of $C{l}_2$ and $O{H}^{-}$ respectively?

$AgN{O}_3\left(aq\right)$ was added to an aqueous KCl solution gradually and the conductivity of the solution was measured. The plot of conductance (A) versus the volume of $AgN{O}_3$ is



(IIT-JEE, 2011)

The correct order of ionic radii of $Ce,La,Pm$ and $Yb$ in its $+3$ oxidation state is:

The most contributing tautomeric enol form of $MeCOC{H}_{2}C{O}_{2}Et$ is?

The correct relationship between wave numbers of spectral lines, in Balmer series of hydrogen atom having the least and highest wave - lengths, is given by

The freezing point of one molal NaCl solution assuming NaCl to be 100% dissociated in water is (molal depression constant = 1.86)

After completion of reaction I and reaction II, the organic compounds in the reaction mixture are:

The relative Lewis acid strengths of boron trihalides are in the order:

The oxidation cleavage of 1,2-diol by a periodic acid or periodic salt to give corresponding carbonyls is known as Malaprade oxidation.



Vicinal diols can also be oxidized to form aldehydes and ketones by lead tetraacetate. This oxidation cleavage is analogous to malaprade oxidation and is known as Criegee oxidation.



When Halohydrin is treated with $A{g}_{2}O$ or Silver salt, it gives pinacol-pinacolone type rearrangement called semi-pinacol rearrangement.

List-I contains reactions and List-II contains products that can be formed.







Which of the following options has the correct combination considering reaction in List-I and their product(s) in List-II?

A plot of volume $\left(V\right)$ versus temperature $\left(T\right)$ for a gas at constant pressure is a straight line passing through the origin. The plots at different values of pressure are shown in the figure. Which of the following order of pressures is correct for this gas?

The vapour density of gas A is four times that of B. If the molecular mass of B is $M$, then the molecular mass of A will be:

Which of the following compound has highest enol content?

The lyophillic sols are

Which of them is not equal to zero for an ideal solution?

The entropy change when two moles of ideal monoatomic gas is heated from ${200}^{\circ }C$ to ${300}^{\circ }C$ reversibly and isochorically?

The condensation polymer among the following is:

The resistance and conductivity of 0.02 M KCl solution are 82.4 ohm and $0.002768Sc{m}^{-1}$, respectively. When filled with $0.005N{K}_{2}S{O}_4$, the solution had a resistance of 324 ohm. Calculate equivalent conductivity of $K_{2}S{O}_4$ solution.

If thesolubility product of $Z{r}_3(P{O}_4{)}_4$ is denoted by $K_{sp}$, and its molar solubility is denoted by $S$, then which of the following relation between $S$ and $K_{sp}$ is correct?

Which of the following represents the structure of cellulose?

The oxidation state of oxygen in Hydrogen peroxide is

Hybridisation of alkyl carbanion is

Which of the following compounds can not exist?

If $E_e,E_{\alpha },E_p$ represents the kinetic energies of an electron, alpha particle and a proton respectively, each moving with same de-Broglie wavelength then:

The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is [$a_o$ is radius of first Bohr orbit]:

The species having bond order different from that in CO is:

Which of the following does not have a pseudo noble gas configuration?

Which of the following acids has the smallest dissociation constant?

Which of the following is a covalent hydride?

Benzaldehyde cannot be prepared by which of the following reactions?

Which is the most stable chair conformer of this compound?

Which of the following molecule(s) has/have highest number of the features given below?

1. Have three traslational degrees of freedom.

2. Have two rotational degrees of freedom.

3. Triatomic and non linear

4. Triatomic and linear

If $N{a}^{+}$ is larger than $M{g}^{2+}$ ion and $S^{2-}$ ion is larger than $C{l}^{-}$ ion, which of the following will be the least soluble in water?

The total pressure of a mixture of 8g of oxygen and 14g of nitrogen contained in a 11.2L vessel at $0^{o}C$ is

The number of antibonding electron pairs in $O_2^{-2}$ molecular ion on the basis of molecular orbital theory is -

Solubility of a salt $A_3{B}_4$ formula is ‘s’, its solubility product is

Covalent hydrides among $Ca{H}_2,N{H}_3,NaHand{B}_2{H}_6$ are _____

The sum of coordination number and oxidation number of the metal M in the complex $\left[M\right(en{)}_2\left(C_2{O}_4\right)]Cl$ (where, en is ethylenediamine) is

The chain isomer of cyclobutane is :

At 400K, the root mean square (rms) speed of a gas X (molecular weight=40) is equal to the most probable speed of gas Y at 60 K.The molecular weight of the gas Y is___

According to Bronsted-Lowry concept, the correct order of relative strength of bases follows the order:

Ferrous oxide has a cubic structure and the edge length of its unit cell is $5.0A^{\circ }$. Assuming the density of ferrous oxide to be $3.84{\text{g/cm}}^3$ , the number of $F{e}^{2+}$ and $O^{2-}$ ions present in each unit cell should be:

$(\text{use}{N}_A=6\times {10}^{23})$: