NTA JEE Main 2nd April 2017 Offline

Which of the following compounds will form significant amount of meta product during mono-nitration reaction?

A water sample has ppm level concentration of following anions
F$$^{-}$$ = 10; SO$$_{4}^{2-}$$ = 100; NO$$_{3}^{-}$$ = 50
The anion/anions that make/makes the water sample unsuitable for drinking is/are

A metal crystallizes in a face centred cubic structure. If the edge length of its unit cell is 'a', the closest approach between two atoms in the metallic crystal will be

The freezing point of benzene decreases by 0.45°C on adding 0.2 g of acetic acid to 20 g of benzene. If acetic acid associates to form a dimer in benzene, then what is the percentage association of acetic acid in benzene?
K$$_{f}$$ for benzene = 5.12 K kg mol$$^{-1}$$

Given
E°$$_{Cl_{2}/Cl^{-}}$$ = 1.36 V, E°$$_{Cr^{3+}/Cr}$$ = -0.74 V
E°$$_{Cr_{2}O_{7}^{2-}/Cr^{3+}}$$ = 1.33 V, E°$$_{MnO_{4}^{-}/Mn^{2+}}$$ = 1.51 V
Among the following, the strongest reducing agent is:

Two reactions A$$_{1}$$ and A$$_{2}$$ have identical pre-exponential factors. The activation energy of A$$_{1}$$ is more than A$$_{2}$$ by 10 kJ mol$$^{-1}$$. If k$$_{1}$$ and k$$_{2}$$ are the rate constants for reactions A$$_{1}$$ and A$$_{2}$$, respectively at 300 K, then $$\ln\frac{k_{2}}{k_{1}}$$ is equal to
(R = 8.314 J mol$$^{-1}$$ K$$^{-1}$$)

The Tyndall effect is observed only when the following conditions are satisfied,
i. The diameter of the dispersed particles is much smaller than the wavelength of the light used.
ii. The diameter of the dispersed particle is not much smaller than the wavelength of the light used.
iii. The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude.
iv. The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.

The products obtained when chlorine gas reacts with cold and dilute aqueous NaOH are

Which of the following reactions is an example of a redox reaction?

In the following reactions, ZnO is respectively acting as a/an,
(i) ZnO + Na$$_{2}$$O → Na$$_{2}$$ZnO$$_{2}$$
(ii) ZnO + CO$$_{2}$$ → ZnCO$$_{3}$$