The primary and secondary valencies of cobalt respectively in $$\mathrm{[Co(NH_3)_5Cl]Cl_2}$$ are :

'A' and 'B' formed in the following set of reactions are :

Decreasing order of the hydrogen bonding in following forms of water is correctly represented by

A. Liquid water

B. Ice

C. Impure water

Choose the correct answer from the options given below :

Assertion A : Hydrolysis of an alkyl chloride is a slow reaction but in the presence of NaI, the rate of the hydrolysis increases.

Reason R : I$$^{-}$$ is a good nucleophile as well as a good leaving group.

In the light of the above statements, choose the correct answer from the options given below

An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is :

In the following given reaction, 'A' is

'R' formed in the following sequence of reactions is :

The magnetic moment of a transition metal compound has been calculated to be 3.87 B.M. The metal ion is

Compound (X) undergoes following sequence of reactions to give the Lactone (Y).

In the depression of freezing point experiment

A. Vapour pressure of the solution is less than that of pure solvent

B. Vapour pressure of the solution is more than that of pure solvent

C. Only solute molecules solidify at the freezing point

D. Only solvent molecules solidify at the freezing point

Choose the most appropriate answer from the options given below :

Order of Covalent bond;

$$\mathrm{A.~KF > KI ; LiF > KF}$$

$$\mathrm{B.~KF < KI ; LiF > KF}$$

$$\mathrm{C.~SnCl_4 > SnCl_2 ; CuCl > NaCl}$$

$$\mathrm{D.~LiF > KF ; CuCl < NaCl}$$

$$\mathrm{E.~KF < KI ; CuCl > NaCl}$$

Choose the correct answer from the options given below :

It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power "n" i.e. $${v^n}$$ of X-rays emitted is plotted against atomic number "Z", following graph is obtained.

The value of 'n' is :

Increasing order of stability of the resonance structures is :

Choose the correct answer from the options given below :

For independent process at 300 K

Process	$$\mathrm{\Delta H/kJ~mol^{-1}}$$	$$\mathrm{\Delta S/J~K^{-1}}$$
A	$$-25$$	$$-80$$
B	$$-22$$	40
C	25	$$-50$$
D	22	20

The number of non-spontaneous process from the following is __________

When $$\mathrm{Fe_{0.93}O}$$ is heated in presence of oxygen, it converts to $$\mathrm{Fe_2O_3}$$. The number of correct statement/s from the following is ________

A. The equivalent weight of $$\mathrm{Fe_{0.93}O}$$ is $${{\mathrm{Molecular\,weight}} \over {0.79}}$$

B. The number of moles of Fe$$^{2+}$$ and Fe$$^{3+}$$ in 1 mole of $$\mathrm{Fe_{0.93}O}$$ is 0.79 and 0.14 respectively

C. $$\mathrm{Fe_{0.93}O}$$ is metal deficient with lattice comprising of cubic closed packed arrangement of O$$^{2-}$$ ions

D. The % composition of Fe$$^{2+}$$ and Fe$$^{3+}$$ in $$\mathrm{Fe_{0.93}O}$$ is 85% and 15% respectively

5 g of NaOH was dissolved in deionized water to prepare a 450 mL stock solution. What volume (in mL) of this solution would be required to prepare 500 mL of 0.1 M solution? _____________

Given : Molar Mass of Na, O and H is 23, 16 and 1 g mol$$^{-1}$$ respectively

Uracil is a base present in RNA with the following structure. % of N in uracil is ___________

Given:

Molar mass N = 14 g mol$$^{-1}$$

O = 16 g mol$$^{-1}$$

C = 12 g mol$$^{-1}$$

H = 1 g mol$$^{-1}$$

Number of moles of AgCl formed in the following reaction is _____________

The number of correct statement/s from the following is __________

A. Larger the activation energy, smaller is the value of the rate constant.

B. The higher is the activation energy, higher is the value of the temperature coefficient.

C. At lower temperatures, increase in temperature causes more change in the value of k than at higher temperature

D. A plot of $$\mathrm{\ln k}$$ vs $$\frac{1}{T}$$ is a straight line with slope equal to $$-\frac{E_a}{R}$$

The dissociation constant of acetic acid is $$x\times10^{-5}$$. When 25 mL of 0.2 $$\mathrm{M~CH_3COONa}$$ solution is mixed with 25 mL of 0.02 $$\mathrm{M~CH_3COOH}$$ solution, the pH of the resultant solution is found to be equal to 5. The value of $$x$$ is ____________

At 298 K, a 1 litre solution containing 10 mmol of $$\mathrm{C{r_2}O_7^{2 - }}$$ and 100 mmol of $$\mathrm{Cr^{3+}}$$ shows a pH of 3.0.

Given : $$\mathrm{C{r_2}O_7^{2 - } \to C{r^{3 + }}\,;\,E^\circ = 1.330}$$V

and $$\mathrm{{{2.303\,RT} \over F} = 0.059}$$ V

The potential for the half cell reaction is $$x\times10^{-3}$$ V. The value of $$x$$ is __________

The d-electronic configuration of $$\mathrm{[CoCl_4]^{2-}}$$ in tetrahedral crystal field in $${e^mt_2^n}$$. Sum of "m" and "number of unpaired electrons" is ___________

If wavelength of the first line of the Paschen series of hydrogen atom is 720 nm, then the wavelength of the second line of this series is _________ nm. (Nearest integer)