An amount of solid NH4HS is placed in a flask already containing ammonia gas at a certain temperature and 0.50 atm. Pressure. Ammonium hydrogen sulphide decomposes to yield NH3 and H2S gases in the flask. When the decomposition reaction reaches equilibrium, the total pressure in the flask rises to 0.84 atm. The equilibrium constant for NH4HS decomposition at this temperature is :

Amongst the following the most basic compound is

Which one of the following methods is neither meant for the synthesis nor for separation of amines?

An organic compound having molecular mass 60 is found to contain C = 20%, H = 6.67% and N = 46.67% while rest is oxygen. On heating it gives NH3 along with a solid residue. The solid residue give violet colour with alkaline copper sulphate solution. The compound is

For a spontaneous reaction the ∆G , equilibrium constant (K) and $$E_{cell}^o$$ will be respectively

Aluminium oxide may be electrolysed at 1000oC to furnish aluminium metal (Atomic mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is Al3+ + 3e- $$\to$$ Alo To prepare 5.12 kg of aluminium metal by this method would require

The highest electrical conductivity of the following aqueous solutions is of :

.tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;} .tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;} .tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top} .tg .tg-uys7{border-color:inherit;text-align:center} .tg .tg-xldj{border-color:inherit;text-align:left} .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top} Electrolyte: KCl KNO3 HCl NaOAc NaCl $${\wedge }^{\infty }(Sc{m}^{2}mo{l}^{-1}):$$ 149.9 145 426.2 91 126.5 Calculate $${\wedge }_{HOAc}^{\infty }$$ Using appropriate molar conductances of the electrolytes listed above at infinite dilution in H2O at 25oC

Which of the following is fully fluorinated polymer?

Which of the following is a polyamide?

The lanthanide contraction is responsible for the fact that :

Which of the following factors may be regarded as the main cause of lanthanide contraction?

Calomel $$\left(H{g}_{2}C{l}_2\right)$$ on reaction with ammonium hydroxide gives :

On heating mixture of $$C{u}_{2}O$$ and $$C{u}_{2}S$$ will give :

The oxidation state of chromium in the final product formed the reaction between $$K\mathrm{I}$$ and acidified potassium dichromate solution is :

Which one of the following species is diamagnetic in nature?

Lattice energy of an ionic compounds depends upon

In both DNA and RNA, heterocyclic base and phosphate ester linkages are at-

Let $$\alpha ,\beta$$ be such that $$\pi <\alpha -\beta <3\pi$$. If sin{\mkern 1mu} \alpha + \sin \beta = - {{21} \over {65}} and \cos \alpha + \cos \beta = - {{27} \over {65}} then the value of \cos {{\alpha - \beta } \over 2} :

If $$u=\sqrt{a^2{\cos }^2\theta +b^2{\sin }^2\theta }+\sqrt{a^2{\sin }^2\theta +b^2{\cos }^2\theta }$$ then the difference between the maximum and minimum values of $$u^2$$ is given by :