[Download PDF] NTA JEE Main 11th January 2019 Shift 2

Instructions

For the following questions answer them individually

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 31

25 mL of the given HCl solution requires 30 mL of 0.1M sodium carbonate solution. What is the volume of this HCl solution required to titrate 30 mL of 0.2M aqueous NaOH solution?

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 32

The de Broglie wavelength $$(\lambda)$$ associated with a photoelectron varies with the frequency $$(\nu)$$ of the incident radiation as, [$$\nu_0$$ is threshold frequency]:

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 33

The correct option with respect to the Pauling electronegativity values of the elements is:

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 34

The reaction $$MgO(s) + C(s) \to Mg(s) + CO(g)$$, for which $$\Delta H° = +491.1$$ kJ mol$$^{-1}$$ and $$\Delta S° = 198.0$$ JK$$^{-1}$$ mol$$^{-1}$$ is not feasible at 298 K. Temperature above which reaction will be feasible is

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 35

The standard reaction Gibbs energy for a chemical reaction at an absolute temperature T is given by $$\Delta G° = A - BT$$ where A and B are non-zero constants. Which of the following is true about this reaction?

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 36

For the equilibrium $$2H_2O \rightleftharpoons H_3O^+ + OH^-$$; the value of $$\Delta G°$$ at 298 K is approximately:

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 37

Match the following items in column I with the corresponding items in column II.

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 38

The hydride that is NOT electron deficient is:

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 39

The relative stability of +1 oxidation state of group 13 elements follows the order

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 40

Which of the following compounds reacts with ethylmagnesium bromide and also decolourizes bromine water solution?

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 41

Which of the following compounds will produce a precipitate with $$AgNO_3$$?

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 42

Taj Mahal is being slowly disfigured and discoloured. This is primarily due to

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 43

The higher concentration of which gas in air can cause stiffness of flower buds?

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 44

The radius of the largest sphere which fits properly at the centre of the edge of a body centred cubic unit cell is: (Edge length is represented by 'a')

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 45

$$K_2HgI_4$$ is 40% ionised in aqueous solution. The value of its van't Hoff factor (i) is:

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 46

Given the equilibrium constant: $$K_C$$ of the reaction: $$Cu(s) + 2Ag^+(aq) \to Cu^{2+}(aq) + 2Ag(s)$$ is $$10 \times 10^{15}$$. Calculate the $$E°_{cell}$$ of this reaction at 298 K. [$$2.303 \frac{RT}{F}$$ at 298 K = 0.059 V]

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 47

The reaction $$2X \to B$$ is a zeroth order reaction. If the initial concentration of X is 0.2M, the half-life is 6 h. When the initial concentration of X is 0.5M, the time required to reach its final concentration of 0.2M will be

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 48

Among the colloids cheese (C), milk (M) and smoke (S), the correct combination of the dispersed phase and dispersion medium, respectively is:

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 49

The reaction that does NOT define calcination is:

Solution

NTA JEE Main 11th January 2019 Shift 2 - Chemistry - Question 50

$$A \xrightarrow{4KOH, O_2} 2B_{(Green)} + 2H_2O$$; $$B \xrightarrow{4HCl} 2C_{(Purple)} + MnO_2 + 2H_2O$$; $$2C \xrightarrow{H_2O, KI} 2A + KOH + D$$. In the above sequence of reactions, A and D, respectively, are: