NTA JEE Main 17th March 2021 Shift 2 - Chemistry

Amongst the following, the linear species is:

During which of the following processes, does entropy decrease?
(A) Freezing of water to ice at 0°C
(B) Freezing of water to ice at -10°C
(C) N$$_2$$(g) + 3H$$_2$$(g) $$\to$$ 2NH$$_3$$(g)
(D) Adsorption of CO(g) and lead surface
(E) Dissolution of NaCl in water

The functional groups that are responsible for the ion-exchange property of cation and anion exchange resins, respectively, are:

The set of elements that differ in mutual relationship from those of the other sets is:

One of the by-products formed during the recovery of NH$$_3$$ from Solvay process is:

The correct pair(s) of the ambident nucleophiles is (are):
(A) AgCN / KCN
(B) RCOOAg / RCOOK
(C) AgNO$$_2$$ / KNO$$_2$$
(D) AgI / KI

Nitrogen can be estimated by Kjeldahl's method for which of the following compound?

Given below are two statements:
Statement-I: 2-methylbutane on oxidation with KMnO$$_4$$ gives 2-methylbutan-2-ol.
Statement-II: n-alkanes can be easily oxidised to corresponding alcohol with KMnO$$_4$$.
Choose the correct option:

Choose the correct statement regarding the formation of carbocations A and B given:

Which of the following statement(s) is (are) incorrect reason for eutrophication?
(A) excess usage of fertilisers
(B) excess usage of detergents
(C) dense plant population in water bodies
(D) lack of nutrients in water bodies that prevent plant growth
Choose the most appropriate answer from the options given below:

For the coagulation of a negative sol, the species below, that has the highest flocculating power is:

Match List-I and List-II:
List-I                                                       List-II
a. Haematite                                           i. Al$$_2$$O$$_3$$ . xH$$_2$$O
b. Bauxite                                               ii. Fe$$_2$$O$$_3$$
c. Magnetite                                           iii. CuCO$$_3$$ . Cu(OH)$$_2$$
d. Malachite                                            iv. Fe$$_3$$O$$_4$$
Choose the correct answer from the options given below:

The set that represents the pair of neutral oxides of nitrogen is:

The common positive oxidation states for an element with atomic number 24, are:

Match List-I with List-II:
List-I                                                             List-II
a. [Co(NH$$_3$$)$$_6$$][Cr(CN)$$_6$$]               i. Linkage isomerism
b. [Co(NH$$_3$$)$$_3$$(NO$$_2$$)$$_3$$]              ii. Solvate isomerism
c. [Cr(H$$_2$$O)$$_6$$]Cl$$_3$$                           iii. Co-ordination isomerism
d. $$cis$$-[CrCl$$_2$$(ox)$$_2$$]$$^{3-}$$              iv. Optical isomerism
Choose the correct answer from the options given below:

In the above reaction, the structural formula of (A), "X" and "Y" respectively are:

Primary, secondary and tertiary amines can be separated using:

Match List-I with List-II:
List-I (Chemical Compound)                                 List-II (Used as)
a. Sucralose                                                     i. Synthetic detergent
b. Glyceryl ester of stearic acid                       ii. Artificial sweetener
c. Sodium benzoate                                        iii. Antiseptic
d. Bithional                                                    iv. Food preservative
Choose the correct match:

Fructose is an example of:

In the above reactions, the enzyme A and enzyme B respectively are:

Consider the above reaction. The percentage yield of amide product is ________ (Round off to the Nearest Integer).
(Given: Atomic mass: C: 12.0u, H: 1.0u, N: 14.0u, O: 16.0u, Cl: 35.5u)

The number of chlorine atoms in 20 mL of chlorine gas at STP is ________ $$\times 10^{21}$$. (Round off to the Nearest Integer).
[Assume chlorine is an ideal gas at STP. R = 0.083 L bar mol$$^{-1}$$ K$$^{-1}$$, $$N_A = 6.023 \times 10^{23}$$]

Consider the reaction $$N_2O_4(g) \rightleftharpoons 2NO_2(g)$$. The temperature at which $$K_C = 20.4$$ and $$K_P = 600.1$$, is ________ K. (Round off to the Nearest Integer). [Assume all gases are ideal and R = 0.0831 L bar K$$^{-1}$$ mol$$^{-1}$$]

The total number of C-C sigma bond/s in mesityl oxide ($$C_6H_{10}O$$) is ________ (Round off to the Nearest Integer).

KBr is doped with $$10^{-5}$$ mole percent of SrBr$$_2$$. The number of cationic vacancies in 1 g of KBr crystal is $$10^{14}$$ ________. (Round off to the Nearest Integer). [Atomic Mass: K: 39.1u, Br: 79.9u, $$N_A = 6.023 \times 10^{23}$$]

A 1 molal $$K_4Fe(CN)_6$$ solution has a degree of dissociation of 0.4. Its boiling point is equal to that of another solution which contains 18.1 weight percent of a non electrolytic solute A. The molar mass of A is ________ u. (Round off to the Nearest Integer). [Density of water = 1.0 g cm$$^{-3}$$]

A KCl solution of conductivity 0.14 S m$$^{-1}$$ shows a resistance of 4.19$$\Omega$$ in a conductivity cell. If the same cell is filled with an HCl solution, the resistance drops to 1.03$$\Omega$$. The conductivity of the HCl solution is ________ $$\times 10^{-2}$$ S m$$^{-1}$$. (Round off to the Nearest Integer).

The reaction $$2A + B_2 \to 2AB$$ is an elementary reaction. For a certain quantity of reactants, if the volume of the reaction vessel is reduced by a factor of 3, the rate of the reaction increases by a factor of ________. (Round off to the Nearest Integer).

In the ground state of atomic Fe (Z = 26), the spin-only magnetic moment is ________ $$\times 10^{-1}$$ BM. (Round off to the Nearest Integer).
[Given: $$\sqrt{3} = 1.73, \sqrt{2} = 1.41$$]

On complete reaction of FeCl$$_3$$ with oxalic acid in aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe in the product A is ________. (Round off to the Nearest Integer).