NTA JEE Main 6th April 2023 Shift 1 - Chemistry

NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 31

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For a concentrated solution of a weak electrolyte ($$K_{eq}$$ = equilibrium constant) A$$_2$$B$$_3$$ of concentration 'C', the degree of dissociation '$$\alpha$$' is

A

$$\left(\dfrac{K_{eq}}{5c^4}\right)^{1/5}$$

B

$$\left(\dfrac{K_{eq}}{108c^4}\right)^{1/5}$$

C

$$\left(\dfrac{K_{eq}}{25c^2}\right)^{1/5}$$

D

$$\left(\dfrac{K_{eq}}{6c^5}\right)^{1/5}$$

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 32

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Which of the following options are correct for the reaction?
$$2Au(CN)_2 ^-(aq) + Zn(s) \rightarrow 2Au(s) + Zn(CN)_4 ^{2-}(aq)$$
A. Redox reaction
B. Displacement reaction
C. Decomposition reaction
D. Combination reaction

A

A only

B

A and D only

C

A and B only

D

C and D only

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 33

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Strong reducing and oxidizing agents among the following, respectively, are

A

Ce$$^{3+}$$ and Ce$$^{4+}$$

B

Ce$$^{4+}$$ and Tb$$^{4+}$$

C

Ce$$^{4+}$$ and Eu$$^{2+}$$

D

Eu$$^{2+}$$ and Ce$$^{4+}$$

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 34

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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: Loss of electron from hydrogen atom results in nucleus of ~$$1.5 \times 10^{-3}$$ pm size.
Reason R: Proton H$$^+$$ always exists in combined form.
In the light of the above statements, choose the most appropriate answer from the options given below:

A

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

B

A is correct but R is not correct

C

A is not correct but R is correct

D

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

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 35

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The setting time of Cement is increased by adding

A

Clay

B

Silica

C

Gypsum

D

Limestone

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 36

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Match List-I with List-II.
List-I (Element detected)   List-II (Reagent used/Product formed)
A. Nitrogen                         I.      Na$$_2$$FeCN$$_5$$NO
B. Sulphur                           II.     AgNO$$_3$$
C. Phosphorus                   III.    Fe$$_4$$FeCN$$_{6_{3}}$$
D. Halogen                          IV.   NH$$_{4_{2}}$$MoO$$_4$$

A

A $$\rightarrow$$ III; B $$\rightarrow$$ I; C $$\rightarrow$$ IV; D $$\rightarrow$$ II

B

A $$\rightarrow$$ II; B $$\rightarrow$$ IV; C $$\rightarrow$$ I; D $$\rightarrow$$ III

C

A $$\rightarrow$$ IV; B $$\rightarrow$$ II; C $$\rightarrow$$ I; D $$\rightarrow$$ III

D

A $$\rightarrow$$ II; B $$\rightarrow$$ I; C $$\rightarrow$$ IV; D $$\rightarrow$$ III

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 37

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The possibility of photochemical smog formation is more at

A

Marshy lands

B

Industrial areas

C

Himalayan villages in winter

D

The places with healthy vegetation

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 38

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A compound is formed by two elements X and Y. The element Y forms cubic close packed arrangement and those of element X occupy one third of the tetrahedral voids. What is the formula of the compound?

A

X$$_2$$Y$$_3$$

B

X$$_3$$Y$$_2$$

C

X$$_3$$Y

D

XY$$_3$$

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 39

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The standard electrode potential of M$$^+$$/M in aqueous solution does not depend on

A

Hydration of a gaseous metal ion

B

Sublimation of a solid metal

C

Ionisation of a solid metal atom

D

Ionisation of a gaseous metal atom

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 40

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Match List I with List II
LIST I - Enzymatic reaction                           LIST II - Enzyme
A. Sucrose $$\rightarrow$$ Glucose and Fructose            I. Zymase
B. Glucose $$\rightarrow$$ ethyl alcohol and CO$$_2$$             II. Pepsin
C. Starch $$\rightarrow$$ Maltose                                        III. Invertase
D. Proteins $$\rightarrow$$ Amino acids                             IV. Diastase

A

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

B

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

C

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

D

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

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 41

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The difference between electron gain enthalpies will be maximum between:

A

Ne and F

B

Ar and F

C

Ne and Cl

D

Ar and Cl

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 42

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Match List I with List II
List I (Oxide)   List II (Type of bond)
A. N$$_2$$O$$_4$$              I. 1 N=O bond
B. NO$$_2$$                II. 1 N-O-N bond
C. N$$_2$$O$$_5$$              III. 1 N-N bond
D. N$$_2$$O                IV. 1 N=N/N$$\equiv$$N bond

A

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

B

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

C

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

D

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

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 43

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Match List-I with List-II.
List-I (Name of reaction)                  List-II (Reagent used)
A. Hell-Volhard Zelinsky reaction       I. NaOH + I$$_2$$
B. Iodoform reaction                            II. (i) CrO$$_2$$Cl$$_2$$, CS$$_2$$ (ii) H$$_2$$O
C. Etard reaction                                   III. (i) Br$$_2$$/red phosphorus (ii) H$$_2$$O
D. Gatterman-Koch reaction               IV. CO, HCl, anhyd. AlCl$$_3$$

A

A $$\rightarrow$$ III; B $$\rightarrow$$ I; C $$\rightarrow$$ II; D $$\rightarrow$$ IV

B

A $$\rightarrow$$ I; B $$\rightarrow$$ II; C $$\rightarrow$$ III; D $$\rightarrow$$ IV

C

A $$\rightarrow$$ III; B $$\rightarrow$$ II; C $$\rightarrow$$ I; D $$\rightarrow$$ IV

D

A $$\rightarrow$$ III; B $$\rightarrow$$ I; C $$\rightarrow$$ IV; D $$\rightarrow$$ II

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NTA JEE Main 6th 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: The spin only magnetic moment value for Fe(CN)$$_6^{3-}$$ is 1.74 BM, whereas for [Fe(H$$_2$$O)$$_6$$]$$^{3+}$$ is 5.92 BM.
Reason B: In both complexes, Fe is present in +3 oxidation state.
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

A is true but R is false

C

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

D

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

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 45

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For the reaction

The correct statement is

A

Br$$^-$$ can act as competing nucleophile.

B

The reaction can occur in acetic acid also.

C

The transition state formed in the above reaction is less polar than the localised anion.

D

The solvent used in the reaction solvates the ions formed in rate determining step

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 46

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The major products A and B from the following reactions are:

(1)

(2)

(3)

(4)

A

Option (1)

B

Option (2)

C

Option (3)

D

Option (4)

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 47

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The major product formed in the following reaction is

A

Phthalic anhydride derivative

B

C

D

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 48

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Compound P is neutral, Q gives effervescence with NaHCO$$_3$$ while R reacts with Hinsberg's reagent to give solid soluble in NaOH. Compound P is

A

B

C

D

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 49

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Polymer used in orlon is:

A

Polyethene

B

Polycarbonate

C

Polyamide

D

Polyacrylonitrile

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 50

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Match List I and List II
List I (Vitamin)               List II (Deficiency disease)
A. Vitamin A                     I. Beri-Beri
B. Thiamine                      II. Cheilosis
C. Ascorbic acid              III. Xerophthalmia
D. Riboflavin                     IV. Scurvy
Choose the correct answer from the options given below

A

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

B

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

C

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

D

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

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 51

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If 5 moles of BaCl$$_2$$ is mixed with 2 moles of Na$$_3$$PO$$_4$$, the maximum number of moles of Ba$$_3$$(PO$$_4$$)$$_2$$ formed is ______ (Nearest integer)

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 52

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The wavelength of an electron of kinetic energy $$4.50 \times 10^{-29}$$ J is ______ $$\times 10{-5}$$ m. (Nearest integer)
Given: mass of electron is $$9 \times 10{-31}$$ kg, h = $$6.6 \times 10{-34}$$ Js

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 53

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The number of species from the following which have square pyramidal structure is ______
PF$$_5$$, BrF$$_4^-$$, IF$$_5$$, BrF$$_5$$, XeOF$$_4$$, ICl$$_4^-$$

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 54

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The value of log K for the reaction A $$\rightleftharpoons$$ B at 298 K is ______. (Nearest integer)
Given: $$\Delta H° = -54.07$$ kJ mol$$^{-1}$$, $$\Delta S° = 10$$ J K$$^{-1}$$ mol$$^{-1}$$
(Taken $$2.303 \times 8.314 \times 298 = 5705$$)

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 55

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Consider the graph of Gibbs free energy G vs extent of reaction. The number of statement/s from the following which are true with respect to points (a), (b) and (c) is ______

A. Reaction is spontaneous at (a) and (b)
B. Reaction is at equilibrium at point (b) and non-spontaneous at point (c)
C. Reaction is spontaneous at (a) and non-spontaneous at (c)
D. Reaction is non-spontaneous at (a) and (b)

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 56

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Number of bromo derivatives obtained on treating ethane with excess of Br$$_2$$ in diffused sunlight is ______

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 57

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Mass of Urea NH$$_2$$CONH$$_2$$ required to be dissolved in 1000 g of water in order to reduce the vapour pressure of water by 25% is ______ g. (Nearest integer)
Given: Molar mass of N, C, O and H are 14, 12, 16 and 1 g mol$$^{-1}$$ respectively.

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 58

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For the adsorption of hydrogen on platinum, the activation energy is 30 kJ mol$$^{-1}$$ and for the adsorption of hydrogen on nickel, the activation energy is 41.4 kJ mol$$^{-1}$$. The logarithm of the ratio of the rates of chemisorption on equal areas of the metals at 300 K is ______ (Nearest integer)
Given: ln10 = 2.3, R = 8.3 J K$$^{-1}$$ mol$$^{-1}$$

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 59

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In ammonium-phosphomolybdate, the oxidation state of Mo is +______

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NTA JEE Main 6th April 2023 Shift 1 - Chemistry - Question 60

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Number of ambidentate ligands in a representative metal complex M(en)(SCN)$$_4$$ is ______. [en = ethylenediamine]

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