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In the following sequence of reactions ?

The relation between extent of adsorbtion (x/m) and pressure at constant temperature is called as:

(a) Write any three methods of preparations of alkyl halides

(b) Write the following reactions

i) Williamsons synthesis of ethers ii) Reimer-Tiemann reaction

Which of the following statements is wrong ?

In which of the following compounds, the C - Cl bond ionisation shall give most stable carboniumion?

Analysis shows that nickel oxide has the formula $N{i}_{0.98}{O}_{{1.100}^{.}}$ What fraction of nickel exist as $N{i}^{2+}andN{i}^{3+}$ ions ?

$\left[Cr\right(N{H}_3{)}_6{]}^{3+}$ is paramagnetic while $\left[Ni\right(CN{)}_4{]}^{2-}$ is diamagnetic. Explain, Why?

Why except certain Zn,Cd,Hg,Mn other metals have one or more typical metallic structure at normal temperature?

How can you obtain 2-methyl-propan-2-ol using grignard reagent?

Can you please explain the procedure or the method by which I can solve similar compounds... There is a trick to find the actual compound so please can you elaborate it ..It will be very helpful to me.

The density of a 0.438 M solution of potassium chromate at 298 K is $1.063gc{m}^{-3}$. Calculate the vapour pressure of water above this solution. Given : $P^0$ (water) = 23.79 mm Hg.

Maximum iron occurs in

Formation of ethylene from acetylene is an example of :

Match the List-I with List – II
$\begin{array}{cccc}& \text{List - I}& & \text{List - II}\\ \text{(P)}& \text{Chloroform-methyl alcohol}& \text{(1)}& \text{Enthalpy change +ve}\\ \text{(Q)}& \text{Methyl alcohol-ethyl alcohol}& \text{(2)}& \text{Enthalpy change -ve}\\ \text{(R)}& \text{Ethyl alcohol-water}& \text{(3)}& \text{Entropy change +ve}\\ \text{(S)}& \text{Water-nitric acid}& \text{(4)}& \text{Change in volume,}\Delta V=+ve\\ & & \text{(5)}& \text{Change in volume,}\Delta V=-ve\end{array}$
Match each product in LIST-I with one or more reaction in LIST-II and choose the correct option.

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.

Which of the following substrates will give a racemised product?

The following structure has five different types of C-H bonds, mark a to e



Arrange the five C-H bonds in decreasing order of their bond energy.

Which of the following is/are correct representation of the property stated against it?

Giving examples, differentiate between roasting' and calcination'

One mole of an ideal gas for which $C_v=\left(\frac{3}{2}\right)R$ is heated reversibly at a constant pressure of 1 atm from ${25}^{o}C$ to ${100}^{o}C$. The $△H$ is:
Given: R = 1.987 cal

Which of the following compounds will give racemic mixture on nucleophilic substitution by $O{H}^{-}$ ion?

(a) (i) (b) (i), (ii) and (iii) (c) (ii) and (iii) (d) (i) and (iii)

Predict which of the following reaction will have appreciable concentration of reactants and products:
a) $C{l}_2\left(g\right)\leftrightarrow 2Cl\left(g\right);K_c=5\times {10}^{-39}$
b) $C{l}_2\left(g\right)+2NO\left(g\right)\leftrightarrow 2NOCl\left(g\right);K_c=3.7\times {10}^8$
c) $C{l}_2\left(g\right)+2N{O}_2\left(g\right)\leftrightarrow 2N{O}_{2}Cl\left(g\right);K_c=1.8$

Which of the following are addition polymers?

(a) Nylon

(b) Melamine formaldehyde resin

(c) Orlon

(d) Polystyrene

The isomer of ethanol is:

A physician wishes to prepare a buffer solution at pH = 4.41 that efficiently resist change in pH yet contains only small concentration of the buffering agents. Which one of the following weak acid together with its sodium salt should be best to use?

The frequency of radiations emitted when electron falls from n = 4, to n = 1, in H-atom would be:

(Given E₁ for H=2.18×10^-18 J atom ^-1 and h=6.625 ×10^-34 Js.)

Maximum stability will be in which of the following free radicals?

In the reaction: $M{e}_{3}C-O-C{H}_{2}C{H}_3+\underset{\left(\text{1 mole}\right)}{HI}\stackrel{\Delta }{\to }$

Ammonium hydrogen sulphide dissociates according to the equation $N{H}_{4}HS\left(s\right)\rightleftharpoons N{H}_3\left(g\right)+H_{2}S\left(g\right).$ If the observed pressure of the mixture is $1.12atm$ at ${106}^{o}C,$ what is the equilibrium constant $K_p$ of the reaction?

The correct order of acidity of the following compounds is

The time period for revolution of electron in a Hydrogen atom state $n_1$ is $T_1$ and time period for revolution of electron in higher orbit $n_2$ is $T_2$. If $\frac{T_2}{T_1}=27$. Which values of $n_1$ and $n_2$ are not possible?

Ethyl chloride $\left(C_2{H}_{5}Cl\right)$ is prepared by reaction of ethylene with hydrogen chloride:
$C_2{H}_4\left(g\right)+HCl\left(g\right)\to C_2{H}_{5}Cl\left(g\right)△H=-72.3kJ/mol$
What is the value of $△U$ (in $kJ$), if $98g$ of ethylene and 109.5 g of $HCl$ are allowed to react at $300K$?

A crystal is made up of particles $X,Y$ and $Z$. $X$ forms FCC packing. $Y$ occupies all the octahedral voids of $X$ and $Z$ occupies all the tetrahedral voids of $X$. If all the particles along one body diagonal are removed, then the formula of the crystal would be:

Number of $\sigma and\pi$ bonds in Benzonitrile are?

Naturally occurring chlorine consists of two isotopes whose atomic weights are 35 and 37. The atomic weight of natural chlorine is 35.5, then what is the ratio of $C{l}^{35}toC{l}^{37}$?

Calculate the n-factor for $N{H}_{4}OH$

An aqueous solution contains $0.10M{H}_{2}S$ and $0.20MHCl$. If the equilibrium constants for the formation $H{S}^{-}$ from $H_{2}S$ is $1.0\times {10}^{-7}$ and that of $S^{2-}$ from ions $H{S}^{-}$ is $1.2\times {10}^{-13}$ then the concentration of $S^{2-}$ ions in aqueous solution is:

numbers of nodes present in 3d are _____?

Statement - I: $Cd$ is a transition element.
Statement - II: $Cd$ and $C{d}^{2+}$ both have completely filled $d-$ orbitals in their ground state.

$\begin{array}{cc}\text{List I}& \text{List II}\\ \text{A.}B{i}^{3+}⟶(BiO{)}^{+}& \text{p. Heat}\\ \text{B.}[Al{O}_2{]}^{-}⟶Al(OH{)}_3& \text{q. Hydrolysis}\\ \text{C.}Si{O}_4^{4-}⟶S{i}_2{O}_7^{6-}& \text{r. Acidification}\\ \text{D.}\left(B_4{O}_7^{2-}\right)⟶B(OH{)}_3& \text{s. dilution by water}\end{array}$