NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry

NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 51

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Consider the equilibrium $$CO(g)+3H_{2}(g)\rightleftharpoons CH_{4}(g)+H_{2}O(g)$$ If the pressure applied over the system
increases by two fold at constant temperature then (A) Concentration of reactants and products increases. (B) Equilibrium will shift in forward direction. (C) Equilibrium constant increases since concentration of products increases. (D) Equilibrium constant remains unchanged as concentration of reactants and products remain same. Choose the correct answer from the options given below :

A

(A), (B) and (C) only

B

(A) and (B) only

C

(A), (B) and (D) only

D

(B) and (C) only

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 52

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Drug X becomes ineffective after 50% decomposition. The original concentration of drug in a bottle was 16mg/mL which becomes 4mg/mL in 12 months. The expiry time of the drug in months is _________
Assume that the decomposition of the drug follows first order kinetics.

A

2

B

6

C

12

D

3

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 53

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$$O_{2}$$ gas will be evolved as a product of electrolysis of : (A) an aqueous solution of $$AgNO_{3}$$ using silver electrodes. (B) an aqueous solution of $$AgNO_{3}$$ using platinum electrodes. (C) a dilute solution of $$H_{2}SO_{4}$$ using platinum electrodes. (D) a high concentration solution of $$H_{2}SO_{4}$$ using platinum electrodes. Choose the correct answer from the options given below :

A

(A) and (C) only

B

(B) and (C) only

C

(A) and (D) only

D

(B) and (D) only

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 54

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Identify the homoleptic complexes with odd number of d electrons in the central metal : (A) $$[FeO_4]^{2-}$$ (B) $$[Fe(CN)_6]^{3-}$$ (C) $$ [Fe(CN)_5NO]^{2-}$$ (D) $$[CoCl_4]^{2-}$$ (E) $$ [Co(H_2O)_3F_3]$$ Choose the correct answer from the options given below :

A

(A), (B) and (D) only

B

(C) and (E) only

C

(B) and (D) only

D

(A), (C) and (E) only

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 55

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Which one of the following, with HBr will give a phenol?

A

B

C

D

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 56

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Given below are two statements : Statement (I) : NaCl is added to the ice at $$0^{\circ}C$$, present in the ice cream box to prevent the melting of ice cream. Statement (II) : On addition of NaCl to ice at $$0^{\circ}C$$ , there is a depression in freezing point. In the light of the above statements, choose the correct answer from the options given below :

A

Both Statement I and Statement II are false

B

Statement I is false but Statement II is true

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 Mains 29th Jan 2025 Shift 2 - Chemistry - Question 57

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Match List - I with List - II :

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 58

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For hydrogen like species, which of the following graphs provides the most appropriate representation of E vs Z plot for a constant n ? [E: Energy of the stationary state, Z : atomic number, n = principal quantum number]

A

B

C

D

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 59

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Which one of the following reaction sequences will give an azo dye?

A

B

C

D

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 60

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Identify the essential amino acids from below : (A) Valine (B) Proline (C) Lysine (D) Threonine (E) Tyrosine
Choose the correct answer from the options given below :

A

(A), (C) and (E) only

B

(A), (C) and (D) only

C

(C), (D) and (E) only

D

(B), (C) and (E) only

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 61

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The calculated spin-only magnetic moments of $$K_3[Fe(OH)_6]$$ and $$K_4[Fe(OH)_6]$$ respectively are :

A

3.87 and 4.90 B.M.

B

4.90 and 5.92 B.M.

C

4.90 and 4.90 B.M.

D

5.92 and 4.90 B.M.

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 62

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The type of oxide formed by the element among Li, Na, Be, Mg, B and Al that has the least atomic radius is :

A

$$A_{2}O$$

B

$$A_{2}O_{3}$$

C

$$AO_{2}$$

D

AO

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 63

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Total number of sigma ($$\sigma$$) and pi($$\pi$$) bonds respectively present in hex-1-en-4-yne are :

A

3 and 13

B

11 and 3

C

13 and 3

D

14 and 3

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 64

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First ionisation enthalpy values of first four group 15 elements are given below. Choose the correct value for the element that is a main component of apatite family :

A

1402 kJ $$mol^{−1}$$

B

834 kJ $$mol^{−1}$$

C

1012 kJ $$mol^{−1}$$

D

947 kJ $$mol^{−1}$$

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 65

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Given below are two statements : Statement (I) : On nitration of m-xylene with $$HNO_{3}$$, $$H_{2}SO_{4}$$ followed by oxidation, 4-nitrobenzene-1,3-dicarboxylic acid is obtained as the major product. Statement (II) : $$-CH_{3}$$ group is o/p-directing while $$-NO_{2}$$ group is m-directing group. In the light of the above statements, choose the correct answer from the options given below :

A

Both Statement I and Statement II are false

B

Statement I is false but Statement II is true

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 Mains 29th Jan 2025 Shift 2 - Chemistry - Question 66

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Which among the following halides will generate the most stable carbocation in the nucleophilic substitution reaction?

A

B

C

D

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 67

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Given below are two statements : Statement (I) : It is impossible to specify simultaneously with arbitrary precision, both the linear momentum and the position of a particle. Statement (II) : If the uncertainty in the measurement of position and uncertainty in measurement of momentum are equal for an electron, then the uncertainty in the measurement of velocity is $$\ge \sqrt{\frac{h}{\pi}} \times \frac{1}{2m}$$. 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

Both Statement I and Statement II are true

D

Statement I is true but Statement II is false

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 68

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0.1 M solution of KI reacts with excess of $$H_{2}SO_{4}$$ and $$KIO{3}$$ solutions. According to equation $$5I^- + IO_3^- + 6H^+ \rightarrow 3I_2 + 3H_2O$$ Identify the correct statements : (A) 200 mL of KI solution reacts with 0.004 mol of $$KIO_{3}$$ (B) 200 mL of KI solution reacts with 0.006 mol of $$H_{2}SO_{4}$$ (C) 0.5 L of KI solution produced 0.005 mol of $$I_{2}$$ (D) Equivalent weight of $$KIO_{3}$$ is equal to ( $$\frac{Molecular weight}{5}$$ ) Choose the correct answer from the options given below :

A

(A) and (D) only

B

(C) and (D) only

C

(B) and (C) only

D

(A) and (B) only

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 69

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Given below are two statements : Statement (I): In partition chromatography, stationary phase is thin film of liquid present in the inert support. Statement (II) : In paper chromatography, the material of paper acts as a stationary phase. 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 Mains 29th Jan 2025 Shift 2 - Chemistry - Question 70

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If $$C(\text{diamond}) \rightarrow C(\text{graphite}) + X\,\text{kJ mol}^{-1} C(\text{diamond}) + O_2(g) \rightarrow CO_2(g) + Y\,\text{kJ mol}^{-1}C(\text{graphite}) + O_2(g) \rightarrow CO_2(g) + Z\,\text{kJ mol}^{-1}$$ at constant temperature. Then

A

X=-Y+Z

B

-X=Y+Z

C

X=Y+Z

D

X=Y-Z

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 71

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In the sulphur estimation, 0.20 g of a pure organic compound gave 0.40 g of barium sulphate. The percentage of sulphur in the compound is ______ $$\times 10^{-1}%$$. (Molar mass : O = 16, S=32, Ba = 137 in $$gmol^{-1}$$)

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 72

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Isomeric hydrocarbons $$\rightarrow$$ negative Baeyer's test (Molecular formula $$C_{9}H_{12}$$) The total number of isomers from above with four different non-aliphatic substitution sites is -

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 73

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Consider the following low-spin complexes $$K_3[Co(NO_2)_6]$$, $$\; K_4[Fe(CN)_6]$$, $$\; K_3[Fe(CN)_6]$$, $$\; Cu_2[Fe(CN)_6] and Zn_2[Fe(CN)_6]$$ The sum of the spin-only magnetic moment values of
complexes having yellow colour is. _____ B.M. (answer in nearest integer)

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 74

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In the Claisen-Schmidt reaction to prepare, dibenzalacetone from 5.3 g of benzaldehyde, a total of 3.51 g of product was obtained. The percentage yield in this reaction was ______ %.

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NTA JEE Mains 29th Jan 2025 Shift 2 - Chemistry - Question 75

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Total number of non bonded electrons present in $$NO_{2}$$ -ion based on Lewis theory is

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