NTA JEE Main 11th April 2014 Online

A gaseous compound of nitrogen and hydrogen contains 12.5% (by mass) of hydrogen. The density of the compound relative to hydrogen is 16. The molecular formula of the compound is:

If $$\lambda_0$$ and $$\lambda$$ be threshold wavelength and wavelength of incident light, the velocity of photoelectron ejected from the metal surface is:

Based on the equation: $$\Delta E = -2.0 \times 10^{-18}$$ J $$\left(\frac{1}{n_2^2} - \frac{1}{n_1^2}\right)$$, the wavelength of the light that must be absorbed to excite hydrogen electron from level n = 1 to level n = 2 will be: (h = $$6.625 \times 10^{-34}$$ Js, C = $$3 \times 10^8$$ ms$$^{-1}$$)

Which of the following series correctly represents relations between the elements from X to Y? X → Y

The correct order of bond dissociation energy among N$$_2$$, O$$_2$$, O$$_2^-$$ is shown in which of the following arrangements?

Which one of the following does not have a pyramidal shape?

In allene (C$$_3$$H$$_4$$), the type(s) of hybridization of the carbon atoms is (are):

The initial volume of a gas cylinder is 750.0 mL. If the pressure of gas inside the cylinder changes from 840.0 mmHg to 360.0 mmHg, the final volume the gas will be:

The molar heat capacity (C$$_p$$) of CD$$_2$$O is 10 cals at 1000 K. The change of entropy associated with cooling of 32 g of CD$$_2$$O vapour from 1000 K to 100 K at constant pressure will be: (D = deuterium, atomic mass = 2u)

Consider the following equilibrium:
$$AgCl \downarrow + 2NH_3 \rightleftharpoons [Ag(NH_3)_2]^+ + Cl^-$$
White precipitate of AgCl appears on adding which of the following?