NTA JEE Main 25th January 2023 Shift 2 - Chemistry

Statement I: Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing towards the positive centre.
Statement II: The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules.
In the light of the above statements, choose the most appropriate answer:

When the hydrogen ion concentration [H$$^+$$] changes by a factor of 1000, the value of pH of the solution

Match List I with List II
A. Cobalt catalyst        I. (H$$_2$$ + Cl$$_2$$) production
B. Syngas                     II. Water gas production
C. Nickel catalyst        III. Coal gasification
D. Brine solution         IV. Methanol production
Choose the correct answer from the options given below:-

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: The alkali metals and their salts impart characteristic colour to reducing flame.
Reason R: Alkali metals can be detected using flame tests.
In the light of the above statements, choose the most appropriate answer from the options given below

Which one among the following metals is the weakest reducing agent?

Which of the following represents the correct order of metallic character of the given elements?

Given below are two statements,one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Carbon forms two important oxides CO and CO$$_2$$. CO is neutral whereas CO$$_2$$ is acidic in nature.
Reason R: CO$$_2$$ can combine with water in a limited way to form carbonic acid, while CO is sparingly soluble in water.
In the light of the above statements, choose the most appropriate answer from the options given below :-

Match List I with List II.
              List I                                                         List II.
A. Propanamine and N-Methylethanamine          I. Metamers
B. Hexan-2-one and Hexan-3-one                        II. Positional isomers
C. Ethanamide and Hydroxyethanimine             III. Functional isomers
D. o-nitrophenol and pnitrophenol                     IV. Tautomers
Choose the correct answer from the options given below :-

The isomeric deuterated bromide with molecular formula C$$_4$$H$$_8$$DBr having two chiral carbon atoms is

What is the mass ratio of ethylene glycol (C$$_2$$H$$_6$$O$$_2$$, molar mass = 62 g/mol) required for making 500 g of 0.25 molal aqueous solution and 250 mL of 0.25 molar aqueous solution?

Given below are two statements:-
Statement I: In froth floatation method a rotating paddle agitates the mixture to drive air out of it.
Statement II: Iron pyrites are generally avoided for extraction of iron due to environmental reasons.
In the light of the above statements, choose the correct answer:

A chloride salt solution acidified with dil. HNO$$_3$$ gives a curdy white precipitate, [A], on addition of AgNO$$_3$$. [A] on treatment with NH$$_4$$OH gives a clear solution, B.

Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from

Match List I with List II
List I                                   List II
 Coordination entity           Wavelength of light absorbed in nm
A. [CoCl(NH$$_3$$)$$_5$$]$$^{2+}$$               I. 310
B. [Co(NH$$_3$$)$$_6$$]$$^{3+}$$                 II. 475
C. [Co(CN)$$_6$$]$$^{3-}$$                   III. 535
D. [Cu(H$$_2$$O)$$_4$$]$$^{2+}$$                 IV. 600
Choose the correct answer from the options given below :-

Find out the major product from the following reaction.

'A' in the given reaction is

Given below are two statements,one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Butylated hydroxyl anisole when added to butter increases its shelf life.
Reason R: Butylated hydroxyl anisole is more reactive towards oxygen than food.
In the light of the above statements, choose the most appropriate answer from the options given below:-

Match List I with List II
List I (Amines)                List II (pKb)
A. Aniline                           I. 3.25
B. Ethanamine                    II. 3.00
C. N-Ethylethanamine         III. 9.38
D. N,N-Diethylethanamine   IV. 3.29
Choose the correct answer from the options given below:-

Match List I with List II
List I (Name of polymer)   List II (Uses)  
A. Glyptal                             I. Flexible pipes
B. Neoprene                         II. Synthetic wool
C. Acrilan                             III. Paints and Lacquers
D. LDP                                  IV. Gaskets
Choose the correct answer from the options given below :-

A. Ammonium salts produce haze in atmosphere.
B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals.
C. Polychlorinated biphenyls act as cleansing solvents.
D. 'Blue baby' syndrome occurs due to the presence of excess of sulphate ions in water.
Choose the correct answer from the options below:-

Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is (Given: Molar mass of A = 84 g mol$$^{-1}$$)

The number of given orbitals which have electron density along the axis is
p$$_x$$, p$$_y$$, p$$_z$$, d$$_{xy}$$, d$$_{yz}$$, d$$_{xz}$$, d$$_z^2$$, d$$_{x^2-y^2}$$

28.0 L of CO$$_2$$ is produced on complete combustion of 16.8 L gaseous mixture of ethene and methane at 25°C and 1 atm. Heat evolved during the combustion process is _____ kJ
Given: $$\Delta H_C$$(CH$$_4$$) = -900 kJ mol$$^{-1}$$
$$\Delta H_C$$(C$$_2$$H$$_4$$) = -1400 kJ mol$$^{-1}$$.

The number of pairs of the solution having the same value of the osmotic pressure from the following is
(Assume 100% ionization)
A. 0.500 M C$$_2$$H$$_5$$OH(aq) and 0.25 M KBr(aq)
B. 0.100 M K$$_4$$[Fe(CN)$$_6$$](aq) and 0.100 M FeSO$$_4$$(NH$$_4$$)$$_2$$SO$$_4$$(aq)
C. 0.05 M K$$_4$$[Fe(CN)$$_6$$](aq) and 0.25 M NaCl(aq)
D. 0.15 M NaCl(aq) and 0.1 M BaCl$$_2$$(aq)
E. 0.02 M KCl.MgCl$$_2$$.6H$$_2$$O(aq) and 0.05 M KCl(aq)

Pt(s)|H$$_2$$(g)(1 bar)|H$$^+$$(aq)(1M)||M$$^{3+}$$(aq), M$$^+$$(aq)|Pt(s)
The E$$_{cell}$$ for the given cell is 0.1115 V at 298 K
When $$\frac{[M^+(aq)]}{[M^{3+}(aq)]} = 10^a$$
The value of a is _____
Given: E$$^0_{M^{3+}/M^+}$$ = 0.2 V
$$\frac{2.303RT}{F}$$ = 0.059 V

A first order reaction has the rate constant, k = 4.6 $$\times 10^{-3}$$ s$$^{-1}$$. The number of correct statement/s from the following is/are Given: log 3 = 0.48.
A. Reaction completes in 1000 s.
B. The reaction has a half-life of 500 s.
C. The time required for 10% completion is 25 times the time required for 90% completion.
D. The degree of dissociation is equal to $$(1 - e^{-kt})$$.
E. The rate and the rate constant have the same unit.

Based on the given figure, the number of correct statement/s is/are

A. Surface tension is the outcome of equal attractive and repulsion forces acting on the liquid molecule in bulk.
B. Surface tension is due to uneven forces acting on the molecules present on the surface.
C. The molecule in the bulk can never come to the liquid surface.
D. The molecules on the surface are responsible for vapour pressure if the system is a closed system.

The number of incorrect statement/s from the following is/are
A. Water vapours are adsorbed by anhydrous calcium chloride.
B. There is a decrease in surface energy during adsorption.
C. As the adsorption proceeds, $$\Delta$$H becomes more and more negative.
D. Adsorption is accompanied by decrease in entropy of the system.

Total number of moles of AgCl precipitated on addition of excess of AgNO$$_3$$ to one mole each of the following complexes [Co(NH$$_3$$)$$_4$$Cl$$_2$$]Cl, [Ni(H$$_2$$O)$$_6$$]Cl$$_2$$, [Pt(NH$$_3$$)$$_2$$Cl$$_2$$] and [Pd(NH$$_3$$)$$_4$$]Cl$$_2$$ is

Number of compounds giving (i) red colouration with ceric ammonium nitrate and also (ii) positive iodoform test from the following is _____