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Molecular velocities of the two gases at the same temperature are $u_1$ and $u_2$. Their masses are $m_1$ and $m_2$ respectively. Which of the following expressions is correct

Which one of the following acids possesses oxidizing, reducing and complex forming properties?

On adding solute to a pure solvent, having vapour pressure 0.80 atm, vapour pressure reduces to 0.60 atm. Mole fraction of solute is

Arrange the following compounds in the increasing orders of their melting point.

$\text{I}.BaC{l}_2$ $\text{II}.SrC{l}_2$ $\text{III}.CaC{l}_2$ $\text{IV}.MgC{l}_2$ $\text{V}.BeC{l}_2$

$BrC{H}_{2}CHBrC{H}_{2}Br\stackrel{alc.KOH}{\to }\left[X\right]\stackrel{C{H}_3{O}^{-}}{\to }Y;\left[X\right]$ and [Y] respectively are

You are given the description of a process called “Vapour phase refining” Vapour Phase Refining: This involves converting the crude metal into a volatile intermediate. This intermediate should also decompose on heating at a reasonable temperature. Which of the following could be categorized under ‘Vapour phase refining’?

Find the wavelength of the first line of spectral series of $H{e}^{+}$ ion whose interval between extreme lines is $\frac{1}{{\lambda }_1}-\frac{1}{{\lambda }_2}=27419.25{\text{cm}}^{-1}$

(Take Rydberg's constant $R=109677{\text{cm}}^{-1},\frac{1}{109677}=9.11\times {10}^{-6}cm$)

Calculate the wavelength of the radiation that would cause photo dissociation of oxygen molecule if the $O=O$ bond energy is $498\text{kJ/mol}$ .

(take Avogadro's number to be $6\times {10}^{23}$, and Planck's constant (h) = $6.6\times {10}^{-34}\text{J s}$)

In a given shell, the order of screening effect is

Which of the following compound acts as an extraordinary oxidising agent?

How many $O{H}^{-}$ are present in 1 ml of a solution, whose $pH$= 13

Arrange $N{O}_2^{+},N{O}_2^{-}$ and $N{O}_3^{-}$ in the decreasing order of their $N-O$ bond lengths.

Assume that a particular amino acid has an isoelectric point of $6.0$. In a solution at $pH$ $1.0$, which of the following species will predominate?

The ionic conductance of which of the following is the highest?

Which of the following represents the monomer of cellulose?

Which of the following is not isoelectronic?

The momentum of a particle with de Broglie wavelength $2\stackrel{\circ }{A}$ is:

$(\text{Planck's constant},h=6.62\times {10}^{-34}Js)$

Which of the following statement is correct regarding the drawbacks of raw rubber [AIIMS 2001]

Calculate the uncertainity in velocity of a cricket ball of mass 150 g if the uncertainty in its position is of the order of $1\stackrel{o}{A}.$

$(h=6.6\times {10}^{-34}kg{m}^2{s}^{-1})$

The metal that forms a nitride by reacting directly with atmospheric $N_2$ is:

Absorption of energy by an atom of hydrogen in the ground state results in the ejection of electron with de-Broglie wavelength $\lambda =4.7\times {10}^{-10}$ m. Given that the ionization energy is 13.6eV, calculate the energy of photon which caused the ejection of electron.

The number of valence electrons in the elements A and B are 4 and 6 respectively. The most probable compound formed from A and B is:

Which of the given statement(s) about N, O, P and Q with respect to M is (are) correct?

During debromination of meso-2,3-dibromobutane,the major compound formed is

For which of the following ions, could the line spectrum not be explained using Bohr's model?

When is heated, it
decomposes into . If some is added, the reaction
goes much faster because

[CPMT
1971,76,80,94]

Phenol and benzoic acid can be separated by:

The chemical reaction $2O_3\to 3O_2$ involves two elementary steps :

$O_3\stackrel{fast}{\to }{O}_2+O;O+O_3\stackrel{Slow}{\to }2O_2$

The differential rate law expression will be :

Find all the intermediates and products formed during the course of the following reaction.

How much work in $kJmo{l}^{-1}$ unit is done by reversible and isothermal expansion of $1.2$ mole of an ideal gas to $10$ times of its original volume at ${27}^{o}C$ ?

Ferrimagnetism is in

Which of the following represents the electronic configuration of a transition element

The volume of a colloidal particle, $V_c$ as compared to the volume of solute particle in a true solution, $V_S$ could be

One mole of a gas is expanded from (1 L, 10 atm,300K) to (4 L, 5 atm,600K) against a constant external pressure of 1 atm. The heat capacity of gas is $50J/K.$Then the enthalpy change during the process is (1 L atm $\simeq$ 100 J)

The kinetic energy of $N$ molecules of $O_2$ is $x$ joule at $-{123}^{\circ }\text{C}$. Another sample of $O_2$ at ${27}^{\circ }\text{C}$ has a kinetic energy of $2x$. The latter sample contains ____ molecules of $O_2$:

Which of the following of metals, when coupled, will give maximum EMF for a voltaic cell?

Given:

$A{u}^{+}\left(aq\right)+e^{-}\to Au\left(s\right);E^0=1.69V$

$C{u}^{2+}\left(aq\right)+2e^{-}\to Cu\left(s\right);E^0=0.34V$

$P{b}^{2+}\left(aq\right)+2e^{-}\to Pb\left(s\right);E^0=-0.13V$

$F{e}^{2+}\left(aq\right)+2e^{-}\to Fe\left(s\right);E^0=-0.44V$

$C{a}^{2+}\left(aq\right)+2e^{-}\to Ca\left(s\right);E^0=-2.87V$

Correct order of increasing covalent character is:

Which of the following is non-electrolyte?

Which of the following is most electronegative?

Propane nitrile may be converted into propanal with the reagent:

Amylose is a polymer of

In the given reaction

$C_6{H}_5-\stackrel{O}{\stackrel{||}{C}}-\stackrel{O}{\stackrel{||}{C}}-C_6{H}_5\frac{\left(i\right)C{H}_{3}MgBr\left(excess\right)}{\left(iii\right)HOH/H^{}}Product$



Product will be:



$\left(a\right)C_6{H}_{5}C-\stackrel{OH}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}-\stackrel{OH}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}-C_6{H}_5$



$\left(b\right)C_6{H}_{5}C-\stackrel{OH}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}-\stackrel{O}{\stackrel{|}{C}}-C_6{H}_5$

$\left(c\right)C_6{H}_5-COOH$

$\left(d\right)C_6{H}_5-CHOH-CHOH-C_6{H}_5$

What do we mean by close packed structure?

For the reaction $AB\left(g\right)\rightleftharpoons A\left(g\right)+B\left(g\right)$, AB is 33% dissociatated at a total pressure of P. Then