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A negatively charged suspension of clay in water will need for precipitation the minimum amount of

A vessel contains 100 litres of a liquid $x$. Heat is supplied to the liquid in such a fashion that, Heat given = change in enthalpy. The volume of the liquid increases by 2 litres. If the external pressure is one atm, and 202.6 Joules of heat were supplied then, [ U - total internal energy ]

Match the following

Aqueous solution of the following compound on electrolysis gives ethane

A hydrocarbon X adds on one mole of hydrogen to give another hydrocarbon and decolourised bromine water. X reacts with $KMn{O}_4$ in presence of acid to give two moles of the same carboxylic acid. The structure of X is

On hydrolysis with dil H₂SO₄, starch and cellulose give 'X' and 'Y'. Then 'X' and 'Y' are a pair of

A conjugated alkadiene having molecular formula $C_{12}{H}_{22}$ on ozonolysis yields butanone, ethanedial and cyclohexanecarbaldehyde. Which of the following is the correct structural formula ofthe alkadiene.

The activation energy for a reaction at the temperature TK was found to be 2.303 $RTJmo{l}^{-1}$. The ratio of the rate constant to Arrhenius factor is ___

which one of the given options would convert propylbenzene into (1-methoxypropyl)benzene:

Which of the following compounds has the maximum molar conductivity?

Assuming that water vapour is an ideal gas, the internal energy change (∆U) when 1 mol of water is vapourised at 1 bar pressure and 100${}^{\circ }$ C, (given : molar enthalpy of vapourisation of water at 1 bar and 373 K = 41 kJ mol${}^{-1}$ and R = 8.3 J mol${}^{-1}$ K${}^{-1}$ ) will be

What is the molar solubility of $A{g}_{2}C{O}_3(K_{sp}=4\times {10}^{-13})$ in $0.1\text{M}N{a}_{2}C{O}_3$ solution?

The above P-V diagram represents the thermodynamic cycle of an engine, operating with an ideal monoatomic gas. The amount of heat, extracted from the source in a single cycle is:

Which of the following is not a process in the extraction of metals?

For a first order reaction, A $\to$ P, the temperature (T) dependent rate constant (k) was found to follow the equation:

$logk=\frac{2000}{T}+6.0$

the pre - exponential factor A and the activation energy $E_{\alpha }$. respectively, are:

If the observed and the theoretical molecular mass of NaCl is found to be 31.80 and 58.50, then the percentage dissociation of NaCl is

Mark out the incorrect pair of compounds and their shapes:

What would be the product when propene reacts with chlorine in presence of $CC{l}_4$?

The ozonolysis products of an olefin are $OHC-CHO$ and $OHC-C{H}_2-C{H}_2-CHO$, the olefin is:

Calculate oxidation state of $Ag$ in $Ag\left[\right(S_2{O}_3{)}_2{]}^{3-}$ molecule

The ionic radii of isoelectronic species $N^{3-},O^{2-}$ and $F^{-}$ in $\stackrel{o}{A}$ are respectively:

Reaction of phenol with dil. HNO₃ gives [KCET 1993; RPMT 1997]

The ground state electronic configuration of nitrogen atom can be represented by

A cubical vessel has a side with 'I' cm lenth contained a gas at a pressure of 'p'. when the side of the vessel is made $\frac{1}{2}$ cm, the pressure of gas becomes?

What compound is formed when copper sulphate solution reacts with an excess of $KCN$?

If the radius of the second Bohr orbit of hydrogen atom is $r_2$, the radius of the third Bohr orbit will be

The correct order of total number of nodes of atomic orbitals is:

Which of the following is an example for intra-molecular redox reaction?

Meso compounds do not show optical activity because they

Which are the starting materials for the preparation of

$C_2{H}_{5}Cl+Na\stackrel{Dryether}{\to }X+NaCl$ Number of possible structural and stereo isomers for mono chloro derivatives of 'X' are

The base found only in the nucleotide of RNA is

The degrees of freedom of Oxygen gas molecule at normal temperature is:

A mixture of $HCOOH$ and $H_2{C}_2{O}_4$ is heated with concentrated $H_{2}S{O}_4$. The gas produced is collected and on treating with $KOH$ solution, the volume of the gas decreases by $\frac{1}{6^{th}}$. The molar ratio of the two acids ($HCOOH$ : $H_2{C}_2{O}_4$) in the original mixture is:



The corresponding reactions are:

$HCOOH\stackrel{H_{2}S{O}_4}{\to }{H}_{2}O+CO$

$H_2{C}_2{O}_4\stackrel{H_{2}S{O}_4}{\to }{H}_{2}O+C{O}_2+CO$



Assume that the water produced is in liquid state.

The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is $1:4$. Their ratio of number of molecules is:

$LiH+B_2{H}_6\stackrel{Ether}{\to }A.$ A is as follows

​​​​​​The decreasing order of $p{K}_a$ value of the following is:

I. $CH\equiv CH$

II.

III.

Osmotic pressure is 0.0821 atm at a temperature of 300 K. Find concentration in mole/litre.

An example of a psychiatric agent is

Which of the
following is correct

[DPMT 1997]

Identify the correct balanced redox reaction by using ion-electron method:

$Bi{O}_3^{-}+M{n}^{2+}\to B{i}^{3+}+Mn{O}_4^{-}+H_{2}O$

If $N_A$ is Avogadro’s number, then the number of valence electrons in $4.2\text{g}$ of azide ions ($N_3^{-}$) are:

A green ball weighs 75 g and comes travelling towards you at 400 cm/s. A photon of light emitted from green ball has a wavelength of $5\times {10}^{-5}$ cm. Assuming that the error in the position of ball is the same as the wavelength of itself, calculate the error in the momentum of the green ball.