NTA JEE Main 24th January 2023 Shift 2 - Chemistry

NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 31

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What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species: N$$_2$$, N$$_2^+$$, O$$_2$$, O$$_2^+$$?

A

0, 1, 2, 1

B

2, 1, 2, 1

C

0, 1, 0, 1

D

2, 1, 0, 1

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 32

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Choose the correct representation of conductometric titration of benzoic acid vs sodium hydroxide.

A

B

C

D

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 33

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In which of the following reactions the hydrogen peroxide acts as a reducing agent?

A

PbS + 4H$$_2$$O$$_2$$ $$\to$$ PbSO$$_4$$ + 4H$$_2$$O

B

2Fe$$^{2+}$$ + H$$_2$$O$$_2$$ $$\to$$ 2Fe$$^{3+}$$ + 2OH$$^-$$

C

HOCl + H$$_2$$O$$_2$$ $$\to$$ H$$_3$$O$$^+$$ + Cl$$^{-1}$$ + O$$_2$$

D

Mn$$^{2+}$$ + H$$_2$$O$$_2$$ $$\to$$ Mn$$^{4+}$$ + 2OH$$^-$$

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 34

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Identify the correct statements about alkali metals.
A. The order of standard reduction potential (M$$^+$$ | M) for alkali metal ions is Na > Rb > Li.
B. CsI is highly soluble in water.
C. Lithium carbonate is highly stable to heat.
D. Potassium dissolved in concentrated liquid ammonia is blue and paramagnetic.
E. All alkali metal hydrides are ionic solids.
Choose the correct answer from the options given below

A

A, B, D only

B

C and E only

C

A and E only

D

A, B and E only

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 35

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Beryllium has less negative value of reduction potential compared to the other alkaline earth metals.
Reason R: Beryllium has large hydration energy due to small size of Be$$^{2+}$$ but relatively large value of atomisation enthalpy.
In the light of the above statements, choose the most appropriate answer from the options given below.

A

A is correct but R is not correct

B

Both A and R are correct and R is the correct explanation of A

C

A is not correct but R is correct

D

Both A and R are correct and R is NOT the correct explanation of A

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 36

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The number of s-electrons present in an ion with 55 protons in its unipositive state is

A

8

B

9

C

12

D

10

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 37

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Which will undergo deprotonation most readily in basic medium?

A

a only

B

c only

C

Both a and c

D

b only

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 38

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Given below are two statements:
Statement I:

under Clemmensen reduction conditions will give

Statement II:

under Wolff-Kishner reduction condition will give

In the light of the above statements, choose the correct answer from the options given below:

A

Statement I is false but Statement II is true

B

Both Statement I and Statement II are false

C

Statement I is true but Statement II is false

D

Both Statement I and Statement II are true

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 39

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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Benzene is more stable than hypothetical cyclohexatriene.
Reason R: The delocalized $$\pi$$ electron cloud is attracted more strongly by nuclei of carbon atoms.
In the light of the above statements, choose the correct answer from the options given below:

A

A is true but R is false.

B

A is false but R is true.

C

Both A and R are correct and R is the correct explanation of A.

D

Both A and R are correct but R is not the correct explanation of A.

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 40

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The metal which is extracted by oxidation and subsequent reduction from its ore is:

A

Al

B

Ag

C

Cu

D

Fe

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 41

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Which one amongst the following are good oxidising agents?
(a) Sm$$^{2+}$$
(b) Ce$$^{2+}$$
(c) Ce$$^{4+}$$
(d) Tb$$^{4+}$$
Choose the most appropriate answer from the options below:

A

C only

B

D only

C

A and B only

D

C and D only

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 42

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K$$_2$$Cr$$_2$$O$$_7$$ paper acidified with dilute H$$_2$$SO$$_4$$ turns green when exposed to

A

Carbon dioxide

B

Sulphur trioxide

C

Hydrogen sulphide

D

Sulphur dioxide

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 43

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Which of the following cannot be explained by crystal field theory?

A

The order of spectrochemical series

B

Magnetic properties of transition metal complexes

C

Colour of metal complexes

D

Stability of metal complexes

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 44

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The hybridization and magnetic behaviour of cobalt ion in [Co(NH$$_3$$)$$_6$$]$$^{3+}$$ complex, respectively is

A

sp$$^3$$ d$$^2$$ and diamagnetic

B

d$$^2$$ sp$$^3$$ and paramagnetic

C

d$$^2$$ sp$$^3$$ and diamagnetic

D

sp$$^3$$ d$$^2$$ and paramagnetic

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 45

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Find out the major products from the following reactions.

A

B

C

D

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 46

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Given below are two statements:
Statement I: Pure Aniline and other arylamines are usually colourless.
Statement II: Arylamines get coloured on storage due to atmospheric reduction.
In the light of the above statements, choose the most appropriate answer from the options given below:

A

Both Statement I and Statement II are incorrect

B

Both Statement I and Statement II are correct

C

Statement I is correct but Statement II is incorrect

D

Statement I is incorrect but Statement II is correct

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 47

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Choose the correct colour of the product for the following reaction.

A

Yellow

B

White

C

Red

D

Blue

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 48

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Correct statement is:

A

An average human being consumes more food than air

B

An average human being consumes nearly 15 times more air than food

C

An average human being consumes equal amount of food and air

D

An average human being consumes 100 times more air than food

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 49

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Match List I with List II
LIST I (Type)                   LIST II (Name)
A. Antifertility drug        I. Norethindrone
B. Tranquilizer               II. Meprobromate
C. Antihistamine            III. Seldane
D. Antibiotic                  IV. Ampicillin
Choose the correct answer from the options given below:

A

A-II, B-I, C-III, D-IV

B

A-IV, B-III, C-II, D-I

C

A-I, B-III, C-II, D-IV

D

A-I, B-II, C-III, D-IV

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 50

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Following figure shows spectrum of an ideal black body at four different temperatures. The number of correct statement/s from the following is _____.

A. $$T_4 > T_3 > T_2 > T_1$$
B. The black body consists of particles performing simple harmonic motion.
C. The peak of the spectrum shifts to shorter wavelength as temperature increases.
D. $$\frac{T_1}{\nu_1} = \frac{T_2}{\nu_2} = \frac{T_3}{\nu_3}$$
E. The given spectrum could be explained using quantisation of energy

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 51

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Sum of $$\pi$$-bonds present in peroxodisulphuric acid and pyrosulphuric acid is

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 52

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The number of statement's, which are correct with respect to the compression of carbon dioxide from point (a) in the Andrews isotherm from the following is _____.

A. Carbon dioxide remains as a gas upto point (b)
B. Liquid carbon dioxide appears at point (c)
C. Liquid and gaseous carbon dioxide coexist between points (b) and (c)
D. As the volume decreases from (b) to (c), the amount of liquid decreases

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 53

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One mole of an ideal monoatomic gas is subjected to changes as shown in the graph. The magnitude of the work done (by the system or on the system) is _____ J (nearest integer)

Given: log 2 = 0.3, ln 10 = 2.3

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 54

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If the pKa of lactic acid is 5, then the pH of 0.005 M calcium lactate solution at 25°C is _____ $$\times 10^{-1}$$ (Nearest integer)

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 55

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The Total pressure observed by mixing two liquid A and B is 350 mm Hg when their mole fractions are 0.7 and 0.3 respectively. The Total pressure becomes 410 mm Hg if the mole fractions are changed to 0.2 and 0.8 respectively for A and B. The vapour pressure of pure A is _____ mm Hg. (Nearest integer) Consider the liquids and solutions behave ideally

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 56

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The number of units, which are used to express concentration of solutions from the following is _____.
(Mass percent, Mole, Mole fraction, Molarity, ppm, Molality.)

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 57

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A student has studied the decomposition of a gas $$AB_3$$ at 25°C. He obtained the following data

p (mm Hg)	50	100	200	400
Relative $$t_{1/2}$$ (s)	4	2	1	0.5

The order of the reaction is

A

0.5

B

2

C

1

D

0

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 58

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The number of statement/s which are the characteristics of physisorption is _____.
A. It is highly specific in nature
B. Enthalpy of adsorption is high
C. It decreases with increase in temperature
D. It results into unimolecular layer
E. No activation energy is needed

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 59

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Maximum number of isomeric monochloro derivatives which can be obtained from 2,2,5,5-tetramethylhexane by chlorination is _____

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NTA JEE Main 24th January 2023 Shift 2 - Chemistry - Question 60

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Total number of tripeptides possible by mixing of valine and proline is _____.

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