NTA JEE Mains 06th April 2024 Shift 2 - Chemistry

NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 31

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Molality ($$m$$) of $$3M$$ aqueous solution of NaCl is : (Given : Density of solution $$= 1.25 \text{ g mL}^{-1}$$, Molar mass in $$\text{gmol}^{-1}$$: Na $$- 23$$, Cl $$- 35.5$$)

A

$$1.9 \text{ m}$$

B

$$3.85 \text{ m}$$

C

$$2.79 \text{ m}$$

D

$$2.90 \text{ m}$$

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 32

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The ratio $$\frac{K_P}{K_C}$$ for the reaction : $$CO_{(g)} + \frac{1}{2} O_{2(g)} \rightleftharpoons CO_{2(g)}$$ is :

A

$$\frac{1}{\sqrt{RT}}$$

B

$$(RT)^{1/2}$$

C

$$RT$$

D

$$1$$

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 33

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Match List - I with List - II.

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 34

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The number of ions from the following that are expected to behave as oxidising agent is : $$Sn^{4+}, Sn^{2+}, Pb^{2+}, Tl^{3+}, Pb^{4+}, Tl^{+}$$

A

$$3$$

B

$$2$$

C

$$1$$

D

$$4$$

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 35

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Evaluate the following statements related to group 14 elements for their correctness. (A) Covalent radius decreases down the group from C to Pb in a regular manner. (B) Electronegativity decreases from C to Pb down the group gradually. (C) Maximum covalance of C is 4 whereas other elements can expand their covalance due to presence of d orbitals. (D) Heavier elements do not form $$p\pi - p\pi$$ bonds. (E) Carbon can exhibit negative oxidation states. Choose the correct answer from the options given below :

A

(A), (B) and (C) Only

B

(C), (D) and (E) Only

C

(C) and (D) Only

D

(A) and (B) Only

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 36

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The correct statement among the following, for a "chromatography" purification method is :

A

Organic compounds run faster than solvent in the thin layer chromatographic plate.

B

$$R_f$$ is an integral value.

C

$$R_f$$ of a polar compound is smaller than that of a non-polar compound.

D

Non-polar compounds are retained at top and polar compounds come down in column chromatography.

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 37

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The incorrect statement regarding the geometrical isomers of 2-butene is :

A

cis-2-butene and trans-2-butene are not interconvertible at room temperature.

B

cis-2-butene and trans-2-butene are stereoisomers.

C

cis-2-butene has less dipole moment than trans-2-butene.

D

trans-2-butene is more stable than cis-2-butene.

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 38

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How can an electrochemical cell be converted into an electrolytic cell?

A

Applying an external opposite potential lower than $$E^0$$ cell.

B

Reversing the flow of ions in salt bridge.

C

Applying an external opposite potential greater than $$E^0$$ cell.

D

Exchanging the electrodes at anode and cathode.

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 39

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Arrange the following elements in the increasing order of number of unpaired electrons in it. (A) Sc (B) Cr (C) V (D) Ti (E) Mn. Choose the correct answer from the options given below :

A

$$(A) < (D) < (C) < (B) < (E)$$

B

$$(C) < (E) < (B) < (A) < (D)$$

C

$$(A) < (D) < (C) < (E) < (B)$$

D

$$(B) < (C) < (D) < (E) < (A)$$

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 40

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The correct IUPAC name of $$[PtBr_2(PMe_3)_2]$$ is :

A

dibromodi(trimethylphosphine)platinum(II)

B

bis(trimethylphosphine)dibromoplatinum(II)

C

dibromobis(trimethylphosphine)platinum(II)

D

bis[bromo(trimethylphosphine)]platinum(II)

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 41

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Given below are two statements : Statement I : $$PF_5$$ and $$BrF_5$$ both exhibit $$sp^3d$$ hybridisation. Statement II : Both $$SF_6$$ and $$[Co(NH_3)_6]^{3+}$$ exhibit $$sp^3d^2$$ hybridisation. 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 true

D

Both Statement I and Statement II are false

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 42

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Match List - I with List - II.

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 43

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The correct arrangement for decreasing order of electrophilic substitution for above compounds is : 

A

$$(III) > (I) > (II) > (IV)$$

B

$$(IV) > (I) > (II) > (III)$$

C

$$(III) > (IV) > (II) > (I)$$

D

$$(II) > (IV) > (III) > (I)$$

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 44

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Consider the given reaction, identify the major product "P". $$CH_3 - COOH \xrightarrow{(i) LiAlH_4 \; (ii) PCC \; (iii) HCN/OH^{-} \; (iv) H_2O/OH^{-}, \Delta}$$ "P"

A

B

$$CH_3 - CH_2 - CH_2 - OH$$

C

D

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 45

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Consider the above chemical reaction. Product "A " is :

A

B

C

D

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 46

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 The major products formed A and B respectively are:

A

B

C

D

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 47

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Identify the product (A) in the following reaction. 

A

B

C

D

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 48

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During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in $$NH_4OH$$ solution when sodium carbonate extract was first acidified with dil. $$HNO_3$$ and then $$AgNO_3$$ solution was added. This indicates presence of :

A

$$Br^{-}$$

B

$$I^{-}$$

C

$$Cl^{-}$$

D

$$CO_3^{2-}$$

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 49

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Match List - I with List - II. 

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 50

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The incorrect statements regarding enzymes are : (A) Enzymes are biocatalysts. (B) Enzymes are non-specific and can catalyse different kinds of reactions. (C) Most Enzymes are globular proteins. (D) Enzyme - oxidase catalyses the hydrolysis of maltose into glucose. Choose the correct answer from the option given below :

A

(B), (C) and (D)

B

(B) and (D)

C

(A), (B) and (C)

D

(B) and (C)

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 51

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Consider the following reactions $$NiS + HNO_3 + HCl \rightarrow A + NO + S + H_2O$$. $$A + NH_4OH + H_3C - C(=N-OH) - C(=N-OH) - H_3C \rightarrow B + NH_4Cl + H_2O$$. The number of protons that do not involve in hydrogen bonding in the product $$B$$ is ___________.

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 52

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For hydrogen atom, energy of an electron in first excited state is $$-3.4 \text{ eV}$$, K.E. of the same electron of hydrogen atom is $$x \text{ eV}$$. Value of $$x$$ is ___________ $$\times 10^{-1} \text{ eV}$$. (Nearest integer)

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 53

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An amine (X) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to it the solution remains clear. Molar mass of the amine (X) formed is ___________ $$\text{gmol}^{-1}$$. (Given molar mass in $$\text{gmol}^{-1}$$: C : 12, H : 1, O : 16, N : 14)

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 54

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For the reaction at $$298 \text{ K}$$, $$2A + B \rightarrow C$$. $$\Delta H = 400 \text{ kJ mol}^{-1}$$ and $$\Delta S = 0.2 \text{ kJ mol}^{-1} \text{K}^{-1}$$. The reaction will become spontaneous above ___________ K.

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 55

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Consider the two different first order reactions given below $$A + B \rightarrow C$$ (Reaction 1) $$P \rightarrow Q$$ (Reaction 2). The ratio of the half life of Reaction 1 : Reaction 2 is $$5 : 2$$. If $$t_1$$ and $$t_2$$ represent the time taken to complete $$\frac{2}{3}^{rd}$$ and $$\frac{4}{5}^{th}$$ of Reaction 1 and Reaction 2, respectively, then the value of the ratio $$t_1 : t_2$$ is ___________ $$\times 10^{-1}$$ (nearest integer). [Given : $$\log_{10}(3) = 0.477$$ and $$\log_{10}(5) = 0.699$$]

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 56

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Among $$VO_2^{+}$$, $$MnO_4^{-}$$ and $$Cr_2O_7^{2-}$$, the spin-only magnetic moment value of the species with least oxidising ability is ___________ BM (Nearest integer). (Given atomic number $$V = 23, Mn = 25, Cr = 24$$)

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 57

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Number of carbocations from the following that are not stabilized by hyperconjugation is __________

_

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 58

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When '$$x$$' $$\times 10^{-2}$$ mL methanol (molar mass $$= 32 \text{ g}$$; density $$= 0.792 \text{ g/cm}^3$$) is added to $$100 \text{ mL}$$ water (density $$= 1 \text{ g/cm}^3$$), the following diagram is obtained. $$x =$$ ___________ (nearest integer).

[Given : Molal freezing point depression constant of water at $$273.15 \text{ K}$$ is $$1.86 \text{ K kg mol}^{-1}$$]

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 59

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Total number of species from the following with central atom utilising $$sp^2$$ hybrid orbitals for bonding is ___________. $$NH_3$$, $$SO_2$$, $$SiO_2$$, $$BeCl_2$$, $$C_2H_2$$, $$C_2H_4$$, $$BCl_3$$, $$HCHO$$, $$C_6H_6$$, $$BF_3$$, $$C_2H_4Cl_2$$

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NTA JEE Mains 06th April 2024 Shift 2 - Chemistry - Question 60

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 The ratio of number of oxygen atoms to bromine atoms in the product Q is ___________ $$\times 10^{-1}$$.

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