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If this is Energy vs Dihedral angle graph of Butane, then I,II and III are respectively :

When limestone is heated, quicklime is formed according to the equation.

$CaC{O}_3\left(s\right)\rightleftharpoons CaO\left(s\right)+C{O}_2\left(g\right)$

The experiment was carried out in the temperature range $800-{900}^{o}C,$ Equilibrium constant $K_p$ follows the relation. $log{K}_p=7.282-\frac{8500}{T}$

where, T is temperature in Kelvin. At what temperature the decomposition will give $C{O}_2\left(g\right)$ at 1 atm?

Which of the following solutions will have the highest boiling point?

In a compound oxide ions are present in CCP. $\frac{1}{6}$ th of the tetrahedral voids are occupied cation A and $\frac{1}{3}$ rd of the octahedral voids are occupied by cation B. What is the formula of the compound and what are the charges on A and B respectively.

Which of the following reactions will not give 2-methyl-2-phenylpropane?

An aqueous solution of $BaC{l}_2$ (1.28gm in 100gm of water)boils at ${100.0832}^{\circ }$ at 1 atm. Calculate the degree of dissociation. ( $K_b$ of water is 0.512 k/m)

50 mL of $H_2$ gas diffuses through a small hole from a vessel in 20 min. Time taken by 40 mL of $O_2$ gas to diffuse under similar conditions will be :

Which of the following is not isoelectronic series?

The rate constant for a reaction depends upon each of the following, EXCEPT:

One mole of a gas is expanded from ($1L,10atm,300K$) to ($4L,5atm,300K$) against a constant external pressure of $1atm$. The heat capacity of gas is $50J{/}^{o}C.$Then the work done during the process is:

(Take $1Latm\simeq 100J$)

C-C bond length is maximum in

At a given temperature, the total vapour pressure (in Torr) of a mixture of volatile components A and B is given by P = 120 - 75 XB hence vapour pressure of pure A and B respectively (in Torr) are -

Electron affinity of the element or ions is correctly shown in :

Which one of the following oxide is neutral in nature?

Calculate the maximum kinetic energy of photoelectrons emitted when a light of frequency $2\times {10}^{16}Hz$ is irradiated on a metal surface with threshold frequency $\left({\nu }_o\right)$ equal to $8.68\times {10}^{15}Hz$

For an ideal gas $(\frac{C_P}{C_v}=\gamma )$; of molar mass M, its specific heat capacity at constant volume is:

The weakest interaction among the following is _____.

P-V plots for two gases during an adiabatic process are given in the figure.

Plot A and Plot B can correspond to: (assume ideal behaviour)

Which of the following molecule(s) are likely to have highest degrees of freedom?

Calculate the pressure of one mole of nitrogen gas in a 10 L cylinder at ${50}^{\circ }C$ using the Van der Waal's equation.Also find the value of ideal gas pressure.(Van der Waal's constants a and b for nitrogen are $1.4L^{2}atmmo{l}^{-2}and0.04L^{2}mo{l}^{-1}$ respectively) .

When isobutyl magnesium bromide in dry ether is treated with absolute ethyl alcohol, the products formed are

The solubility product $\left(K_{sp}\right)$ of the following compounds are given at ${25}^{\circ }C$. The compound most soluble and least soluble coumpounds are:

Compounds $K_{sp}$

$AgCl1.1\times {10}^{-10}AgI1.1\times {10}^{-16}PbCr{O}_{4}4.0\times {10}^{-14}A{g}_{2}C{O}_{3}8.0\times {10}^{-12}$

The major product obtained in the following sequence of reaction is:

In $A{l}_{2}C{l}_6$, which statement is incorrect-

Although there are several ores, 80% of the world copper production comes from the ore chalcopyrite ($CuFe{S}_2$). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction. In the self-reduction step, the reducing species is:

The half-life period of a first order chemical reaction is 6.93 minutes.

The time required for 99% completion of reaction will be (log 2 = 0.301)

The composition of the common glass is

When zinc oxide is heated with cobalt nitrate, a green mass is formed due to the formation of a compound which is known as Rinmann’s green. The compound is:

Which one of the following would produce maximum elevation in boiling point?

Following compounds are given

Which of the above compounds on being warmed with iodine solution and NaOH will give Iodoform?

An acidic solution of $C{u}^{2+}$ salt containing 0.4 g of $C{u}^{2+}$ (CuSO₄) is electrolysed until all the Cu is deposited. The electrolysis is continued for seven more minutes with the volume of solution kept at 100 ml and the current at 1.2 Ampere. Calculate volume of gases evolved at N.T.P at anode during entire electrolysis.

The volume of water that must be added to a mixture of 250 ml of 0.6 M $HCl$ and 750 ml of 0.2 M $HCl$ to obtain 0.25 M solution of $HCl$ is

Principal quantum number of an atom represents

The resistance of $0.01\text{N}NaCl$ solution at $25{}^{\circ }\text{C}$ is $200\Omega$. Cell constant of conductivity cell is $1{\text{cm}}^{-1}$. The equivalent conductance is:

The resistance in the left and right gaps of a balanced meter bridge are $R_1$, $R_2$. The balance point is at 50 cm. If a resistance of $24\Omega$ is connected in parallel to $R_2$the balance point is at 70 cm. The value of $R_1$ is

The molarity of $98\%$ $H_{2}S{O}_4$ $(d=1.8\frac{g}{ml})$ by weight is :

Which hydrogen like species will have the same radius as that of Bohr's first orbit of hydrogen atom?

Amongst the following elements (whose electronic configurations are given below), the one having the highest ionisation energy is

Calculate number of ions present in 0.5 moles of $F^{-}$.

Given:

$N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right);K_1$

$N_2\left(g\right)+O_2\left(g\right)\rightleftharpoons 2NO\left(g\right);K_2$

$H_2\left(g\right)+\frac{1}{2}{O}_2\left(g\right)\rightleftharpoons H_{2}O\left(g\right);K_3$

where $K_1,K_2,K_3$ are equilibrium constants.

The equilibrium constant for the reaction,

$2N{H}_3\left(g\right)+\frac{5}{2}{O}_2\left(g\right)\rightleftharpoons 2NO\left(g\right)+3H_{2}O\left(g\right)$ will be:

What are the products expected in the disproportion reaction of $HClO$?

If $\frac{dy}{dx}+\frac{3}{{\cos }^{2}x}y=\frac{1}{{\cos }^{2}x},x\in (\frac{-\pi }{3},\frac{\pi }{3}),$ and $y\left(\frac{\pi }{4}\right)=\frac{4}{3}$, then $y(-\frac{\pi }{4})$ equals :

The state of hybridization of S in $S{O}_2$ is similar to that of