NTA JEE Main 12th April 2023 Shift 1 - Chemistry

NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 31

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A metal chloride contains $$55.0\%$$ of chlorine by weight. $$100$$ mL vapours of the metal chloride at STP weigh $$0.57$$ g. The molecular formula of the metal chloride is
(Given: Atomic mass of chlorine is $$35.5$$ u)

A

MCl$$_4$$

B

MCl$$_3$$

C

MCl$$_2$$

D

MCl

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 32

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Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : 5f electron can participate in bonding to a far greater extent than 4f electrons
Reason R : 5f orbitals are not as buried as 4f orbitals
In the light of the above statements, choose the correct answer from the options given below

A

A is false but R is true

B

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

C

A is true but R is false

D

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

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 33

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The bond order and magnetic property of acetylide ion are same as that of

A

O$$_2^+$$

B

N$$_2^+$$

C

NO$$^+$$

D

O$$_2^-$$

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 34

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Given below are two statements:
Statement I: SbCl$$_5$$ is more covalent than SbCl$$_3$$
Statement II: The higher oxides of halogens also tend to be more stable than the lower ones.
In the light of the above statements, choose the most appropriate answer from the options given below.

A

Statement I is incorrect but statement II is correct

B

Both Statement I and Statement II are incorrect

C

Both Statement I and Statement II are correct

D

Statement I is correct but statement II is incorrect

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 35

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Match List I with List II

	List I Type of Hydride		List II Example
A	Electron deficient hydride	I	MgH$$_2$$
B	Electron rich hydride	II	HF
C	Electron precise hydride	III	B$$_2$$H$$_6$$
D	Saline hydride	IV	CH$$_4$$

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 36

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In the given reaction cycle

X, Y and Z respectively are

A

X $$-$$ CaCO$$_3$$, Y $$-$$ NaCl, Z $$-$$ KCl

B

X $$-$$ CaCO$$_3$$, Y $$-$$ NaCl, Z $$-$$ HCl

C

X $$-$$ CaO, Y $$-$$ NaCl + CO$$_2$$, Z $$-$$ NaCl

D

X $$-$$ CaO, Y $$-$$ NaCl + CO$$_2$$, Z $$-$$ KCl

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 37

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The density of alkali metals is in the order

A

K $$<$$ Cs $$<$$ Na $$<$$ Rb

B

Na $$<$$ Rb $$<$$ K $$<$$ Cs

C

Na $$<$$ K $$<$$ Cs $$<$$ Rb

D

K $$<$$ Na $$<$$ Rb $$<$$ Cs

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 38

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Given below are two statements:
Statement I: Boron is extremely hard indicating its high lattice energy.
Statement II: Boron has highest melting and boiling point compared to its other group members.
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

Statement I is correct but Statement II is incorrect

C

Both statement I and Statement II are correct

D

Statement I is incorrect but Statement II is correct

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 39

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Correct statements for the given reaction are:

A. Compound 'B' is aromatic
B. The completion of above reaction is very slow
C. 'A' shows tautomerism
D. The bond lengths of C $$-$$ C in compound B are found to be same
Choose the correct answer from the options given below.

A

B, C and D only

B

A, B and C only

C

A, C and D only

D

A, B and D only

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 40

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The two products formed in above reaction are

A

Butanal and acetaldehyde

B

Butanoic acid and acetaldehyde

C

Butanal and acetic acid

D

Butanoic acid and acetic acid

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 41

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Match List I with List II

	List I		List II
A	Nitrogen oxides in air	I	Eutrophication
B	Methane in air	II	pH of rain water becomes 5.6
C	Carbon dioxide	III	Global warming
D	Phosphate fertilisers in water	IV	Acid rain

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 42

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For lead storage battery pick the correct statements
A. During charging of battery, PbSO$$_4$$ on anode is converted into PbO$$_2$$
B. During charging of battery, PbSO$$_4$$ on cathode is converted into PbO$$_2$$
C. Lead storage battery consists of grid of lead packed with PbO$$_2$$ as anode
D. Lead storage battery has ~38% solution of sulphuric acid as an electrolyte
Choose the correct answer from the options given below:

A

A, B, D only

B

B, C, D only

C

B, C only

D

B, D only

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 43

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Four gases, A, B, C and D have critical temperatures 5.3, 33.2, 126.0 and 154.3K respectively. For their adsorption on a fixed amount of charcoal, the correct order is :

A

C $$>$$ D $$>$$ B $$>$$ A

B

C $$>$$ B $$>$$ D $$>$$ A

C

D $$>$$ C $$>$$ B $$>$$ A

D

D $$>$$ C $$>$$ A $$>$$ B

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 44

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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: In the Ellingham diagram, a sharp change in slope of the line is observed from Mg $$\to$$ MgO at ~1120°C
Reason R: There is a large change of entropy associated with the change of state
In the light of the above statements, choose the correct answer from the options given below

A

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

B

A is false but R is true

C

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

D

A is true but R is false

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 45

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The incorrect statement regarding the reaction given below is

A

The product 'B' formed in the above reaction is p-nitrosoamine

B

'B' is N-nitroso ammonium compound at low temperature

C

The reaction occurs at low temperature

D

The electrophile involved in the reaction is NO$$^+$$

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 46

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Match List I with List II

	List I Complex		List II CFSE ($$\Delta_0$$)
A	$$[Cu(NH_3)_6]^{2+}$$	I	$$-0.6$$
B	$$[Ti(H_2O)_6]^{3+}$$	II	$$-2.0$$
C	$$[Fe(CN)_6]^{3-}$$	III	$$-1.2$$
D	$$[NiF_6]^{4-}$$	IV	$$-0.4$$

Choose the correct answer from the options given below:

A

A(III), B(IV), C(I), D(II)

B

A(I), B(IV), C(II), D(III)

C

A(I), B(II), C(IV), D(III)

D

A(II), B(III), C(I), D(IV)

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 47

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In the following reaction

'A' (Major Product) is

A

B

C

D

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 48

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The reaction of a diketone (MeCO-CH$$_2$$-CO-CH$$_3$$) with OEt$$^-$$/$$\Delta$$ gives 'A' (Major Product).

A in the above reaction is :

A

B

C

D

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 49

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The major product 'P' formed in the following sequence of reactions is

A

B

C

D

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 50

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Match List I with List II

	List I (Example)		List II (Type)
A	2-chloro-1, 3-butadiene	I	Biodegradable polymer
B	Nylon 2-nylon 6	II	Synthetic Rubber
C	Polyacrylonitrile	III	Polyester
D	Dacron	IV	Addition Polymer

Choose the correct answer from the options given below:

A

A(II), B(IV), C(I), D(III)

B

A(II), B(I), C(IV), D(III)

C

A(IV), B(I), C(III), D(II)

D

A(IV), B(III), C(I), D(II)

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 51

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Values of work function ($$W_0$$) for a few metals are given below

Metal	Li	Na	K	Mg	Cu	Ag
$$\frac{W_0}{eV}$$	2.42	2.3	2.25	3.7	4.8	4.3

The number of metals which will show photoelectric effect when light of wavelength $$400$$ nm falls on it is _____.
Given: $$h = 6.6 \times 10^{-34}$$ J s, $$c = 3 \times 10^8$$ ms$$^{-1}$$, $$e = 1.6 \times 10^{-19}$$ C

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 52

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At $$600$$ K, the root mean square (rms) speed of gas X (molar mass $$= 40$$) is equal to the most probable speed of gas Y at $$90$$ K. The molar mass of the gas Y is _____ g mol$$^{-1}$$. (Nearest integer)

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 53

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One mole of an ideal gas at $$350$$ K is in a $$2.0$$ L vessel of thermally conducting walls, which are in contact with the surroundings. It undergoes isothermal reversible expansion from $$2.0$$ L to $$3.0$$ L against a constant pressure of $$4$$ atm. The change in entropy of the surroundings ($$\Delta S$$) is _____ J K$$^{-1}$$ (Nearest integer)
Given: $$R = 8.314$$ J K$$^{-1}$$ mol$$^{-1}$$.

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 54

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An analyst wants to convert $$1$$ L HCl of pH $$= 1$$ to a solution of HCl of pH $$= 2$$. The volume of water needed to do this dilution is _____ mL. (Nearest integer)

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 55

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Three organic compounds A, B and C were allowed to run in thin layer chromatography using hexane and gave the following result (see figure). The R$$_f$$ value of the most polar compound is _____ $$\times 10^{-2}$$

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 56

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80 mole percent of MgCl$$_2$$ is dissociated in aqueous solution. The vapour pressure of $$1.0$$ molal aqueous solution of MgCl$$_2$$ at $$38°$$C is _____ mm Hg. (Nearest integer)
Given: Vapour pressure of water at $$38°$$C is $$50$$ mm Hg

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 57

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The reaction $$2$$NO $$+ $$ Br$$_2 \to 2$$ NOBr takes place through the mechanism given below
NO $$+$$ Br$$_2 \rightleftharpoons$$ NOBr$$_2$$ (fast)
NOBr$$_2 +$$ NO $$\to 2$$ NOBr (slow)
The overall order of the reaction is _____.

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 58

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Consider the following reaction sequence:

The value of x in compound 'D' is _____

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 59

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The mass of NH$$_3$$ produced when $$131.8$$ kg of cyclohexane carbaldehyde undergoes Tollen's test is _____ kg. (Nearest Integer)
Molar mass of C $$= 12$$ g/mol, N $$= 14$$ g/mol, O $$= 16$$ g/mol

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NTA JEE Main 12th April 2023 Shift 1 - Chemistry - Question 60

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In an oligopeptide named Alanylglycylphenyl alanyl isoleucine, the number of sp$$^2$$ hybridised carbons is _____.

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