NTA JEE Main 8th April 2017 Online

A metal M reacts with nitrogen gas to afford $$M_3N$$, $$M_3N$$ on heating at high temperature gives back M and on reaction with water produces a gas B. Gas B reacts with an aqueous solution of CuSO$$_4$$ to form a deep blue compound. M and B respectively are:

Consider the following ionization enthalpies of two elements 'A' and 'B'.

Which of the following statements is not true about partition chromatography?

The IUPAC name of the following compound is:

Which of the following compounds will not undergo Friedel Crafts reaction with benzene?

Identify the pollutant gases largely responsible for the discoloured and lustreless nature of marble of the Taj Mahal.

5 g of Na$$_2$$SO$$_4$$ was dissolved in $$x$$ g of H$$_2$$O. The change in freezing point was found to be 3.82°C. If Na$$_2$$SO$$_4$$ is 81.5% ionised, the value of $$x$$ is approximately: ($$K_f$$ for water = 1.86°C kg mol$$^{-1}$$) (molar mass of S = 32 g mol$$^{-1}$$ and that of Na = 23 g mol$$^{-1}$$)

Consider the following standard electrode potentials ($$E°$$ in volts) in aqueous solution:

What is the standard reduction potential ($$E°$$) for $$Fe^{3+} \to Fe$$?
Given that:
$$Fe^{2+} + 2e^- \to Fe$$; $$E°_{Fe^{2+}/Fe} = -0.47$$ V
$$Fe^{3+} + e^- \to Fe^{2+}$$; $$E°_{Fe^{3+}/Fe^{2+}} = +0.77$$ V

The rate of a reaction A doubles on increasing the temperature from 300 to 310 K. By how much, the temperature of reaction B should be increased from 300 K so that rate doubles if activation energy of the reaction B is twice to that of reaction A.