[Solved] NTA JEE Main 2nd April 2017 Offline - Chemistry Paper with Solutions

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 31

1 gram of a carbonate M$$_{2}$$CO$$_{3}$$ on treatment with excess HCl produces 0.01186 moles of CO$$_{2}$$. The molar mass of M$$_{2}$$CO$$_{3}$$ in g mol$$^{-1}$$ is:

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 32

The most abundant elements by mass in the body of a healthy human adult are: Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75 kg person would gain if all $$^{1}$$H atoms are replaced by $$^{2}$$H atoms is:

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 33

Among the following species which option contains all isoelectronic species?

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 34

The radius of the second Bohr orbit for hydrogen atom is
(Planck's constant, (h) = $$6.6262 \times 10^{-34}$$ Js; mass of electron = $$9.1091 \times 10^{-31}$$ kg; charge of electron = $$1.60210 \times 10^{-19}$$ C; permittivity of vacuum, ($$\epsilon_{0}$$) = $$8.854185 \times 10^{-12}$$ kg$$^{-1}$$ m$$^{-3}$$ A$$^{2}$$)

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 35

Which of the following species is not paramagnetic?

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 36

Given:
C(graphite) + O$$_{2}$$(g) → CO$$_{2}$$(g); $$\Delta_{r}$$H° = -393.5 kJ mol$$^{-1}$$
H$$_{2}$$(g) + $$\frac{1}{2}$$O$$_{2}$$(g) → H$$_{2}$$O(l); $$\Delta_{r}$$H° = -285.8 kJ mol$$^{-1}$$
CO$$_{2}$$(g) + 2H$$_{2}$$O(l) → CH$$_{4}$$(g) + 2O$$_{2}$$(g); $$\Delta_{r}$$H° = +890.3 kJ mol$$^{-1}$$
Based on the above thermochemical equations, the value of $$\Delta_{r}$$H° at 298 K for the reaction
C(graphite) + 2H$$_{2}$$(g) → CH$$_{4}$$(g) will be:

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 37

$$\Delta U$$ is equal to:

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 38

pK$$_{a}$$ of a weak acid HA and pK$$_{b}$$ of a weak base BOH are 3.2 and 3.4 respectively. The pH of their salt AB solution at 25°C is:

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 39

Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect is:

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 40

Which of the following molecules is least resonance stabilized?

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 41

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

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 42

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

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 43

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

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 44

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$$^{-1}$$

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 45

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:

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 46

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$$^{-1}$$)

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 47

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.

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 48

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

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 49

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

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 50

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$$_{3}$$

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 51

The sodium salt of an organic acid X produces effervescence with concentrated H$$_{2}$$SO$$_{4}$$. X reacts with the acidified aqueous CaCl$$_{2}$$ solution to give a white precipitate which decolourises acidic solution of KMnO$$_{4}$$. X is

NTA JEE Main 2nd April 2017 Offline - Chemistry - Question 52

On treatment of 100 mL of 0.1 M solution of CoCl$$_{3}$$.6H$$_{2}$$O with excess AgNO$$_{3}$$; $$1.2 \times 10^{22}$$ ions are precipitated. The complex is: