NTA JEE Main 13th April 2023 Shift 2 - Chemistry

NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 31

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Identify the correct order of standard enthalpy of formation of sodium halides.

A

NaI $$<$$ NaBr $$<$$ NaF $$<$$ NaCl

B

NaI $$<$$ NaBr $$<$$ NaCl $$<$$ NaF

C

NaF $$<$$ NaCl $$<$$ NaBr $$<$$ NaI

D

NaCl $$<$$ NaF $$<$$ NaBr $$<$$ NaI

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 32

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Match List-I with List-II.

	List-I		List-II
A	Weak intermolecular forces of attraction	I	Hexamethylenediamine + adipic acid
B	Hydrogen bonding	II	AlEt$$_3$$ + TiCl$$_4$$
C	Heavily branched polymer	III	2-chloro-1, 3-butadiene
D	High density polymer	IV	Phenol + formaldehyde

Choose the correct answer from the options given below

A

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

B

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

C

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

D

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

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 33

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Given below are two statements :
Statement I : SO$$_2$$ and H$$_2$$O both possess V-shaped structure
Statement II : The bond angle of SO$$_2$$ is less than that of H$$_2$$O.
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 incorrect but Statement II is correct

D

Statement I is correct but Statement II is incorrect

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 34

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What happens when methane undergoes combustion in systems A and B respectively?

A

System A: Temperature rises; System B: Temperature remains same

B

System A: Temperature remains same; System B: Temperature rises

C

System A: Temperature falls; System B: Temperature remains same

D

System A: Temperature falls; System B: Temperature rises

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NTA JEE Main 13th April 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 : Isotopes of hydrogen have almost same chemical properties, but difference in their rates of reactions.
Reason R: Isotopes of hydrogen have different enthalpy of bond dissociation.
In the light of the above statements, choose the most appropriate answer from the options given below:

A

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

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

A is correct but R is not correct

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 36

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Better method for preparation of BeF$$_2$$, among the following is

A

BeO + C + F$$_2$$ $$\xrightarrow{\Delta}$$ BeF$$_2$$

B

NH$$_{4_{2}}$$BeF$$_4$$ $$\xrightarrow{\Delta}$$ BeF$$_2$$

C

Be + F$$_2$$ $$\xrightarrow{\Delta}$$ BeF$$_2$$

D

BeH$$_2$$ + F$$_2$$ $$\xrightarrow{\Delta}$$ BeF$$_2$$

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 37

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The major product for the following reaction is :

A

B

C

D

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 38

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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 : Order of acidic nature of the following compounds is A > B > C.

Reason R: Fluoro is a stronger electron withdrawing group than Chloro group.
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 correct and R is the correct explanation of A

C

A is true but R is false

D

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

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 39

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Given below are two statements :
Statement I : Tropolone is an aromatic compound and has $$8\pi$$ electrons.
Statement II : $$\pi$$ electrons of $$> C = O$$ group in tropolone is involved in aromaticity. In the light of the above statements choose the correct answer from the options given below:

A

Statement I is true but Statement II is false

B

Statement I is false but Statement II is true

C

Both Statement I and Statement II are false

D

Both Statement I and Statement II are true

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 40

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Which of the following are the Green house gases?
A. Water vapour
B. Ozone
C. I$$_2$$
D. Molecular hydrogen
Choose the most appropriate answer from the options given below :

A

A and D only

B

B and C only

C

A and B only

D

C and D only

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 41

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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 : The diameter of colloidal particles in solution should not be much smaller than wavelength of light to show Tyndall effect.
Reason R : The light scatters in all directions when the size of particles is large enough.
In the light of the above statements, choose the correct answer from the options given below :

A

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

B

A is true but R is false

C

A is false but R is true

D

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

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 42

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Given below are two statements related to Ellingham diagram :
Statement I : Ellingham diagrams can be constructed for formation of oxides, sulphides and halides of metals.
Statement II : It consists of plots of $$\Delta H°$$ vs T for formation of oxides of elements.
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 correct

B

Both Statement I and Statement II are incorrect

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 13th April 2023 Shift 2 - Chemistry - Question 43

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The correct group of halide ions which can be oxidised by oxygen in acidic medium is

A

Br$$^-$$ and I$$^-$$ only

B

Br$$^-$$ only

C

I$$^-$$ only

D

Cl$$^-$$, Br$$^-$$ and I$$^-$$ only

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 44

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The covalency and oxidation state respectively of boron in BF$$_4^-$$, are

A

$$3$$ and $$5$$

B

$$3$$ and $$4$$

C

$$4$$ and $$4$$

D

$$4$$ and $$3$$

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 45

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Which of the following complexes will exhibit maximum attraction to an applied magnetic field?

A

$$[Ni(H_2O)_6]^{2+}$$

B

$$[Co(en)_3]^{3+}$$

C

$$[Zn(H_2O)_6]^{2+}$$

D

$$[Co(H_2O)_6]^{2+}$$

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 46

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The total number of stereoisomers for the complex $$[Cr(ox)_2ClBr]^{3-}$$ (where ox = oxalate) is

A

$$3$$

B

$$2$$

C

$$4$$

D

$$1$$

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 47

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Match List-I with List-II.
1-Bromopropane is reacted with reagents in List-I to give product in List-II

	List-I Reagent		List-II Product
A	KOH (alc)	I	Nitrile
B	KCN (alc)	II	Ester
C	AgNO$$_2$$	III	Alkene
D	H$$_3$$CCOOAg	IV	Nitroalkane

Choose the correct answer from the options given below

A

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

B

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

C

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

D

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

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 48

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Compound A from the following reaction sequence is :

A

Benzoic Acid

B

Aniline

C

Salicylic Acid

D

Phenol

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 49

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In the wet tests for detection of various cations by precipitation, Ba$$^{2+}$$ cations are detected by obtaining precipitate of

A

Ba(ox) : Barium oxalate

B

BaCO$$_3$$

C

Ba(OAc)$$_2$$

D

BaSO$$_4$$

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 50

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The naturally occurring amino acid that contains only one basic functional group in its chemical structure is

A

asparagine

B

histidine

C

arginine

D

lysine

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 51

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$$1.1$$ g of a carbonate M$$_2$$CO$$_3$$ on treatment with excess HCl produces $$0.01$$ mol of CO$$_2$$. The molar mass of M$$_2$$CO$$_3$$ is _____ g mol$$^{-1}$$. (Nearest integer)

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 52

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The orbital angular momentum of an electron in $$3$$ s orbital is $$\frac{xh}{2\pi}$$. The value of x is _____ (nearest integer)

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 53

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$$20$$ mL of $$0.1$$ M NaOH is added to $$50$$ mL of $$0.1$$ M acetic acid solution. The pH of the resulting solution is _____ $$\times 10^{-2}$$. (Nearest integer) Given : pKa CH$$_3$$COOH $$= 4.76$$
log 2 = 0.30
log 3 = 0.48

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 54

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See the following chemical reaction:
Cr$$_2$$O$$_7^{2-}$$ + XH$$^+$$ + 6Fe$$^{2+}$$ $$\to$$ YCr$$^{3+}$$ + 6Fe$$^{3+}$$ + ZH$$_2$$O
The sum of X, Y and Z is _____.

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 55

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If the formula of Borax is Na$$_2$$ B$$_4$$O$$_x$$(OH)$$_y$$ $$\cdot$$ zH$$_2$$O, then x + y + z = _____

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 56

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$$0.400$$ g of an organic compound (X) gave $$0.376$$ g of AgBr in Carius method for estimation of bromine. % of bromine in the compound (X) is (Given: Molar mass AgBr $$= 188$$ g mol$$^{-1}$$, Br $$= 80$$ g mol$$^{-1}$$)

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 57

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Sodium metal crystallises in a body centred cubic lattice with unit cell edge length of $$4$$ A. The radius of sodium atom is _____ $$\times 10^{-1}$$ A. (Nearest integer)

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 58

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Sea water contains $$29.25$$% NaCl and $$19$$% MgCl$$_2$$ by weight of solution. The normal boiling point of the sea water is _____ °C (Nearest integer) Assume 100% ionization for both NaCl and MgCl$$_2$$. Given:
K$$_b$$H$$_2$$O $$= 0.52$$ K kg mol$$^{-1}$$. Molar mass of NaCl and MgCl$$_2$$ is $$58.5$$ and $$95$$ g mol$$^{-1}$$ respectively.

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 59

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At 298 K, the standard reduction potential for Cu$$^{2+}$$/Cu electrode is 0.34 V. Given :
K$$_{sp}$$Cu(OH)$$_2$$ $$= 1 \times 10^{-20}$$. Take $$\frac{2.303RT}{F} = 0.059$$ V. The reduction potential at pH = 14 for the above couple is $$(-) x \times 10^{-2}$$ V. The value of x is _____.

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NTA JEE Main 13th April 2023 Shift 2 - Chemistry - Question 60

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A(g) $$\to$$ 2B(g) + C(g) is a first order reaction. The initial pressure of the system was found to be $$800$$ mm Hg which increased to $$1600$$ mm Hg after $$10$$ min. The total pressure of the system after $$30$$ min will be _____ mm Hg. (Nearest integer)

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