NTA JEE Main 25th June 2022 Shift 2 - Chemistry

NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 31

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The minimum energy that must be possessed by photons in order to produce the photoelectric effect with platinum metal is:
[Given: The threshold frequency of platinum is $$1.3 \times 10^{15}$$ s$$^{-1}$$ and $$h = 6.6 \times 10^{-34}$$ Js]

A

$$8.58 \times 10^{-19}$$ J

B

$$9.76 \times 10^{-20}$$ J

C

$$3.21 \times 10^{-14}$$ J

D

$$6.24 \times 10^{-16}$$ J

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 32

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What is the correct order of electron gain enthalpy of Cl, F, Te, Po

A

$$F > Cl > Te > Po$$

B

$$Cl > F > Te > Po$$

C

$$Te > Po > Cl > F$$

D

$$Po > Te > F > Cl$$

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 33

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At $$25°$$C and $$1$$ atm pressure, the enthalpy of combustion of benzene $$1$$ and acetylene $$g$$ are $$-3268$$ kJ mol$$^{-1}$$ and $$-1300$$ kJ mol$$^{-1}$$, respectively. The change in enthalpy for the reaction
$$3C_2H_2(g) \to C_6H_6(l)$$, is

A

$$+324$$ kJ mol$$^{-1}$$

B

$$+632$$ kJ mol$$^{-1}$$

C

$$-632$$ kJ mol$$^{-1}$$

D

$$-732$$ kJ mol$$^{-1}$$

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 34

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The $$K_{sp}$$ for bismuth sulphide $$Bi_2S_3$$ is $$1.08 \times 10^{-73}$$. The solubility of $$Bi_2S_3$$ in mol L$$^{-1}$$ at $$298$$ K is

A

$$1.0 \times 10^{-15}$$

B

$$2.7 \times 10^{-12}$$

C

$$3.2 \times 10^{-10}$$

D

$$4.2 \times 10^{-8}$$

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 35

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Assertion: The amphoteric behaviour of water is explained by Lewis acid base theory
Reason: water acts as acid with $$NH_3$$ and base with $$H_2S$$

A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

B

Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.

C

Assertion is true but Reason is false.

D

Assertion is false but Reason is true.

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 36

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The number of bridged oxygen atoms present in compound B formed from the following reactions is
$$PbNO_{3_2} \xrightarrow{673 K} A + PbO + O_2$$
$$A \xrightarrow{Dimerise} B$$

A

0

B

1

C

2

D

3

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 37

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Given below are two statements: one is labelled as Assertion and the other is labelled as Reason.
Assertion: A mixture contains benzoic acid and naphthalene. The pure benzoic acid can be separated out by the use of benzene.
Reason: Benzoic acid is soluble in hot water.
In the light of the above statements, choose the most appropriate answer from the options given below.

A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

B

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

C

Assertion is true but Reason is false.

D

Assertion is false but Reason is true.

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 38

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Given below are two statements: one is labelled as Assertion and the other is labelled as Reason.
Assertion: Polluted water may have a value of BOD of the order of 17ppm.
Reason: BOD is a measure of oxygen required to oxidise both the biodegradable and non-biodegradable organic material in water.
In the light of the above statements, choose the most appropriate answer from the options given below.

A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

B

Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.

C

Assertion is true but Reason is false.

D

Assertion is false but Reason is true.

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 39

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Solute A associates in water. When $$0.7$$ g of solute A is dissolved in $$42.0$$ g of water, it depresses the freezing point by $$0.2°$$C. The percentage association of solute A in water, is
[Given: Molar mass of A $$= 93$$ g mol$$^{-1}$$. Molal depression constant of water is $$1.86$$ K kg mol$$^{-1}$$]

A

50%

B

60%

C

70%

D

80%

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 40

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The correct order of reduction potentials of the following pairs is
A. $$Cl_2/Cl^-$$
B. $$I_2/I^-$$
C. $$Ag^+/Ag$$
D. $$Na^+/Na$$
E. $$Li^+/Li$$
Choose the correct answer from the options given below.

A

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

B

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

C

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

D

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

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 41

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Given below are two statements.
Statement I: During electrolytic refining, blister copper deposits precious metals.
Statement II: In the process of obtaining pure copper by electrolysis method, copper blister is used to make the anode.
In the light of the above statements, choose the correct answer from the options given below.

A

Both Statement I and Statement II are true.

B

Both Statement I and Statement II are false.

C

Statement I is true but Statement II is false.

D

Statement I is false but Statement II is true.

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 42

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The metal ion (in gaseous state) with lowest spin-only magnetic moment value is

A

$$V^{2+}$$

B

$$Ni^{2+}$$

C

$$Cr^{2+}$$

D

$$Fe^{2+}$$

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 43

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In the given reaction

'A' can be

A

benzyl bromide

B

bromobenzene

C

cyclohexyl bromide

D

methyl bromide

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 44

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Amongst the following, the major product of the given chemical reaction is

A

B

C

D

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 45

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The major product formed in the following reaction, is

A

B

C

D

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 46

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Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?

A

B

C

D

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 47

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During halogen test, sodium fusion extract is boiled with concentrated $$HNO_3$$ to

A

remove unreacted sodium

B

decompose cyanide or sulphide of sodium

C

extract halogen from organic compound

D

maintain the pH of extract.

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 48

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Which of the following ketone will NOT give enamine on treatment with secondary amines? [where t-Bu is $$-C(CH_3)_3$$]

A

B

C

D

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 49

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Match the following correctly
(i) Zymase - (a) Stomach
(ii) Urease - (b) Yeast
(iii) Diastase - (c) Malt
(iv) Pepsin - (d) Soyabean

A

(i)-B; (ii) D(iii)-C; (iv)-A

B

(i)-B; (ii)-A; (iii)-C; (iv)-D

C

(i)-A; (ii)-B; (iii)-C; (iv)-D

D

(i)-D; (ii)-C; (iii)-B; (iv)-A

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 50

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An antiseptic dettol is a mixture of two compounds 'A' and 'B' where A has $$6\pi$$ electrons and B has $$2\pi$$ electrons. What is B?

A

Bithional

B

Terpineol

C

Chlorophenol

D

Chloroxyenol

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 51

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A protein 'A' contains $$0.30\%$$ of glycine (molecular weight $$75$$). The minimum molar mass of the protein 'A' is ______ $$\times 10^3$$ g mol$$^{-1}$$ [nearest integer]

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 52

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How many of the following molecules are with non-zero net dipole moment,
$$NH_3$$, HCl, $$H_2O$$, $$BeF_2$$, $$BH_3$$, $$CCl_4$$

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 53

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A rigid nitrogen tank stored inside a laboratory has a pressure of $$30$$ atm at $$06:00$$ am when the temperature is $$27°$$C. At $$03:00$$ pm, when the temperature is $$45°$$C, the pressure in the tank will be ______ atm. [nearest integer]

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 54

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The neutralization occurs when $$10$$ mL of $$0.1$$ M acid 'A' is allowed to react with $$30$$ mL of $$0.05$$ M base $$MOH_2$$. The basicity of the acid 'A' is ______
[M is a metal]

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 55

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A solution of $$Fe_2(SO_4)_3$$ is electrolyzed for '$$x$$' min with a current of $$1.5$$ A to deposit $$0.3482$$ g of Fe. The value of $$x$$ is ______ [nearest integer]
Given : $$1 F = 96500$$ C mol$$^{-1}$$. Atomic mass of Fe $$= 56$$ g mol$$^{-1}$$

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 56

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At $$345$$ K, the half life for the decomposition of a sample of a gaseous compound initially at $$55.5$$ kPa was $$340$$ s. When the pressure was $$27.8$$ kPa, the half life was found to be $$170$$ s. The order of the reaction is ______ [integer answer]

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 57

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$$PCl_5 + H_2O \to A + HCl$$
$$A + H_2O \to B + HCl$$
Find number of ionisable hydrogen in B

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 58

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Amongst $$FeCl_3 \cdot 3H_2O$$, $$K_3[Fe(CN)_6]$$ and $$[Co(NH_3)_6]Cl_3$$, the spin-only magnetic moment value of the inner-orbital complex that absorbs light at shortest wavelength is ______ B.M. [nearest integer]

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 59

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The Novolac polymer has mass of $$963$$ g. The number of monomer units present in it are ______

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NTA JEE Main 25th June 2022 Shift 2 - Chemistry - Question 60

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How many of the given compounds will give a positive Biuret test? ______
Glycine, Glycylalanine, Tripeptide, Biuret

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