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Among the following compounds, which will react with acetone to give a product containing

Given the following reaction at equilibrium $N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right)$. Some inert gas is added at constant volume. Predict which of the following facts will be affected?

The standard enthalpy of formation of octane $\left(C_8{H}_{18}\right)$ is $-250kJ/mol$. Calculate the enthalpy of combustion of $C_8{H}_{18}$.

Given : enthalpy of formation of $C{O}_2\left(g\right)$ and $H_{2}O\left(l\right)$ are $-394kJ/mol$ and $-286kJ/mol$ respectively:

Calculate $△G^{\circ }$ for conversion of oxygen to ozone

$3/2O_2\left(g\right)\to O_3\left(g\right)at298K,if{K}_p$ for this conversion is 2.47 $\times$ ${10}^{-29}$

(Use log(2.47) = 0.4)

Energy involved to ionise $O_2\left(g\right)$ to $O^{2-}\left(g\right)$ is $639{\text{kJ mol}}^{-1}$. If the ionisation enthalpy of $O^{-}\left(g\right)$ is $141{\text{kJ mol}}^{-1}$. The second electron gain enthalpy of oxygen would be:

Assertion: Carboxylic acids have higher boiling points than alkanes.

Reason: Carboxylic acids are resonance hybrids.

Carborundum is the commercial name of

The standard enthalpy of formation of $C{F}_{2}ClC{F}_{2}Cl\left(g\right)$ $\left({\Delta }_f{H}_{300}^{\circ }\right)$ at $1\text{bar}$ and $300\text{K}$ from its constituent elements in their standard states is $-900{\text{kJ mol}}^{-1}$. (Given, $R=8.3{\text{J K}}^{-1}{\text{mol}}^{-1}$)

The standard internal energy of formation $\left({\Delta }_f^{\circ }{U}_{300}\right)$ at the same pressure and temperature is:

The equilibrium constant in a reversible reaction at a given temperature

Which one of the following mixture is considered as an acidic buffer solution ?

The correct order of melting point of alkali metal chlorides is:

Two radioactive element A and B have half - lives in the ratio of 1 : 2. If half - life A is 2 days, what will be the mole ratio of A to B after 12 days in a sample initially containing 1 mole of each ?

Consider a weak electrolyte, $A{B}_3$ having a concentration of 0.1 M in solution. If the degree of dissociation is 0.2, Calculate the ionisation constant $K_i$ of $A{B}_3$.

The alkene limonene has the following structure, The product that results from the reaction of limonene and 1 molar equivalent chlorine water is:

In the nuclear reaction ${}_{12}M{g}^{24}{+}_{2}H{e}^4{=}_0{n}^1+?$ The product nucleus is

The boiling point of a liquid is that temperature at which the vapour pressure of the liquid is

Find moles of $N{H}_{4}Cl$ required to prevent $Mg(OH{)}_2$ from precipitating in a litre of solution which contains 0.02 mole of $N{H}_3$ and 0.001 mole of $M{g}^{2+}$ ions.

Given : $K_b\left(N{H}_3\right)={10}^{-5};K_{sp}\left[Mg\right(OH{)}_2]={10}^{-11}$

Benzyl bromide, on treatment with a nucleophile - triphenylphosphine, is then made to react with n-Butyl lithium - a strong base to give a phosphorus ylid.

Which of the following, on treatment with the said ylid - would yield the hydrocarbon:

Calculate the minimum concentration of $C{O}_3^{2-}$ required to precipitate $NiC{O}_3$ in a solution containing $2.0\times {10}^{-5}M$ of $N{i}^{2+}?$

Given : ($K_{sp}$ for $NiC{O}_3=6.6\times {10}^{-10}$)

At the same temperature and pressure which of the following gas will have highest KE per mol?

Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?

For the reaction, $N_2\left(g\right)+O_2\left(g\right)\rightleftharpoons 2NO\left(g\right)$, the equilibrium constant is $K_1$. The equilibrium constant is $K_2$ for $2NO\left(g\right)+O_2\left(g\right)\rightleftharpoons 2N{O}_2\left(g\right)$. What is K for the reaction $N{O}_2\left(g\right)\rightleftharpoons \frac{1}{2}{N}_2\left(g\right)+O_2\left(g\right)$?

tert-alkyl halides are practically inert to substitution by SN2 mechanism because of:

Number of possible isomers for the complex $\left[Co\right(en{)}_{2}C{l}_2]Cl$ will be (en = ethylenediamine)

In the following reaction sequence, the correct structures of (E), (F) and (G) are:



(*implies ${}^{13}C$ labelled carbon)

1. Increased rate of production of sodium in all cases.


2. Increased production of sodium in all cases.


3. No difference in production of sodium in all cases as compared to before changing.


4. Increased rate of production in case A and decreased rate of production in case B and no change in case C.


5. Increased rate of production in first 2 cases and decrease in 3rd case.

Which one of the following represents the electronic configuration of the most electropositive element?

Sulphur has highest oxidation state in

The addition of sodium acetate to 0.1 M acetic acid will cause

Which among the following metals requires radiation of the shortest wavelength to cause emission of electrons?

Calculate the Normality of a solution having 15 gm equivalents. Dissolved in 750 mL solution.

Ferromagnetism is in

Five gram mol of a diatomic gas $(\gamma =1.4)$ is compressed adiabatically so that its temperature rises from ${127}^{o}C$ to $2{27}^{o}C.$ The work done will be:

Which pair has permanent dipole moment for both the members?

The freezing point of 1 m NaCl solution, assuming NaCl to be 100% dissociated in water

The relative rates of mononitration of $R-C_6{H}_5,$ where $R=-C{H}_3,-N{O}_2,-OH,-Cl$ are

There are two scenarios and in either case, we start with 5-oxohexanal. A reagent or sequence of reactions "A"

helps convert the substrate into 6-hydroxyhexan-2-one. On the other hand, a reagent or sequence of reactions "B"

converts the starting compound into 5-hydroxyhexanal. A and B are:

For an electron placed in the second orbit of the hydrogen atom, calculate the number of revolutions per second made by it around the nucleus.

For a hypothetical hydrogen like atom, the potential energy of the system is given by $U_{\left(r\right)}\left(r\right)=\frac{-K{e}^2}{r^3}$, where $r$ is the distance between the two particles. If Bohr’s model of quantization of angular momentum is applicable, then the velocity of the particle is given by:

In which of the following options the order of arrangement does not agree with the variation of property indicated against it?

Match the following column and correct options.

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \left(a\right)& \text{Raoult's law}& \left(p\right)& \text{Effect of pressure on solubility of gas in liquid}\\ \left(b\right)& \text{Henry's law}& \left(q\right)& \frac{P^o-P_s}{P^o}=X_B\\ \left(c\right)& \text{Ethyl alcohol + Water}& \left(r\right)& \text{Ideal solution}\\ \left(d\right)& \text{Benzene +Toluene}& \left(s\right)& \text{Azeotropic mixture}\end{array}$

A solution of Sodium Hydroxide (NaOH) has a pH of 9. What will be the concentration of $O{H}^{-}$ ions?

What is the relationship between density and pressure?

Which of the following reaction is incorrect?