NTA JEE Main 9th April 2017 Online

50 mL of 0.2 M ammonia solution is treated with 25 mL of 0.2 M HCl. If pK$$_b$$ of ammonia solution is 4.75, the pH of the mixture will be:

Which one of the following is an oxide?

Which of the following compounds is most reactive to an aqueous solution of sodium carbonate?

In the following structure, the double bonds are marked as I, II, III and IV.

Geometrical isomerism is not possible at the site(s):

The major product of the following reaction is:

Methylcyclohexane reacts with Br$$_2$$/h$$\nu$$

Which of the following is a set of greenhouse gases?

A solution is prepared by mixing 8.5 g of CH$$_2$$Cl$$_2$$ and 11.95 g of CHCl$$_3$$. If vapour pressure of CH$$_2$$Cl$$_2$$ and CHCl$$_3$$ at 298K are 415 and 200 mm Hg respectively, the mole fraction of CHCl$$_3$$ in vapour form is: (Molar mass of Cl = 35.5 g mol$$^{-1}$$)

Which of the following ions does not liberate hydrogen gas on reaction with dilute acids?

To find the standard potential of M$$^{3+}$$/M electrode, the following cell is constituted:
Pt | M/M$$^{3+}$$ (0.001 mol L$$^{-1}$$) / Ag$$^+$$ (0.01 mol L$$^{-1}$$) / Ag
The emf of the cell is found to be 0.421 volt at 298 K. The standard potential of half-reaction M$$^{3+}$$ + 3e$$^-$$ $$\rightarrow$$ M at 298 K will be:
(Given: $$E^\ominus_{Ag^+/Ag}$$ at 298 K = 0.80 volt)

The rate of a reaction quadruples when the temperature changes from 300 to 310 K. The activation energy of this reaction is:
(Assume Activation energy and pre-exponential factor are independent of temperature;
ln(2) = 0.693; R = 8.314 J mol$$^{-1}$$ K$$^{-1}$$)