NTA JEE Main 31st January 2023 Shift 1 - Chemistry

NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 31

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Which transition in the hydrogen spectrum would have the same wavelength as the Balmer type transition from n = 4 to n = 2 of He$$^+$$ spectrum

A

n = 2 to n = 1

B

n = 1 to n = 3

C

n = 1 to n = 2

D

n = 3 to n = 4

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 32

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The correct increasing order of the ionic radii is

A

$$Cl^- < Ca^{2+} < K^+ < S^{2-}$$

B

$$K^+ < S^{2-} < Ca^{2+} < Cl^-$$

C

$$S^{2-} < Cl^- < Ca^{2+} < K^+$$

D

$$Ca^{2+} < K^+ < Cl^- < S^{2-}$$

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 33

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Match List I with List II
List I   List II
A. XeF$$_4$$   I. See-saw
B. SF$$_4$$   II. Square planar
C. NH$$_4^+$$   III. Bent T-shaped
D. BrF$$_3$$   IV. Tetrahedral
Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 34

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$$H_2O_2$$ acts as a reducing agent in

A

$$2NaOCl + H_2O_2 \rightarrow 2NaCl + H_2O + O_2$$

B

$$2Fe^{2+} + 2H^+ + H_2O_2 \rightarrow 2Fe^{3+} + 2H_2O$$

C

$$Mn^{2+} + 2H_2O_2 \rightarrow MnO_2 + 2H_2O$$

D

$$Na_2S + 4H_2O_2 \rightarrow Na_2SO_4 + 4H_2O$$

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 35

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Match items of column I and II

A

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

B

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

C

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

D

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

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 36

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Choose the correct set of reagents for the following conversion
trans Ph - CH = CH - CH$$_3$$ $$\rightarrow$$ cis Ph - CH = CH - CH$$_3$$

A

Br$$_2$$, alc KOH, NaNH$$_2$$, NaLiqNH$$_3$$

B

Br$$_2$$, alc KOH, NaNH$$_2$$, H$$_2$$ Lindlar Catalyst

C

Br$$_2$$, aq KOH, NaNH$$_2$$, H$$_2$$ Lindlar Catalyst

D

Br$$_2$$, aq KOH, NaNH$$_2$$, NaLiqNH$$_3$$

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 37

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Which one of the following statements is correct for electrolysis of brine solution?

A

Cl$$_2$$ is formed at cathode

B

O$$_2$$ is formed at cathode

C

H$$_2$$ is formed at anode

D

OH$$^-$$ is formed at cathode

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 38

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Adding surfactants in non polar solvent, the micelles structure will look like
(a)

(b)

(c)

(d)

A

(b)

B

(c)

C

(a)

D

(d)

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 39

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The methods NOT involved in concentration of ore are
(A) Liquation
(B) Leaching
(C) Electrolysis
(D) Hydraulic washing
(E) Froth floatation
Choose the correct answer from the options given below:

A

B, D and C only

B

C, D and E only

C

A and C only

D

B, D and E only

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 40

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Identify X, Y and Z in the following reaction. (Equation not balanced)
$$ClO^. + NO_2 \rightarrow X \xrightarrow{H_2O} Y + Z$$

A

X = ClONO$$_2$$, Y = HOCl, Z = NO$$_2$$

B

X = ClNO$$_2$$, Y = HCl, Z = HNO$$_3$$

C

X = ClONO$$_2$$, Y = HOCl, Z = HNO$$_3$$

D

X = ClNO$$_3$$, Y = Cl$$_2$$, Z = NO$$_2$$

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 41

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When Cu$$^{2+}$$ ion is treated with KI, a white precipitate, X appears in solution. The solution is titrated with sodium thiosulphate, the compound Y is formed. X and Y respectively are

A

X = Cu$$_2$$I$$_2$$, Y = Na$$_2$$S$$_4$$O$$_5$$

B

X = Cu$$_2$$I$$_2$$, Y = Na$$_2$$S$$_4$$O$$_6$$

C

X = CuI$$_2$$, Y = Na$$_2$$S$$_4$$O$$_3$$

D

X = CuI$$_2$$, Y = Na$$_2$$S$$_4$$O$$_6$$

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 42

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The correct order of basicity of oxides of vanadium is

A

$$V_2O_3 > V_2O_4 > V_2O_5$$

B

$$V_2O_3 > V_2O_5 > V_2O_4$$

C

$$V_2O_5 > V_2O_4 > V_2O_3$$

D

$$V_2O_4 > V_2O_3 > V_2O_5$$

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 43

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Nd$$^{2+}$$ = ______

A

$$4f^2 6s^2$$

B

$$4f^4$$

C

$$4f^3$$

D

$$4f^4 6s^2$$

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 44

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Cobalt chloride when dissolved in water forms pink colored complex X which has octahedral geometry. This solution on treating with conc HCl forms deep blue complex, Y which has a Z geometry. X, Y and Z, respectively, are

A

X = CoH$$_2$$O$$_6^{2+}$$, Y = CoCl$$_4^{2-}$$, Z = Tetrahedral

B

X = CoH$$_2$$O$$_6^{2+}$$, Y = CoCl$$_6^{3-}$$, Z = Octahedral

C

X = CoH$$_2$$O$$_6^{3+}$$, Y = CoCl$$_6^{3-}$$, Z = Octahedral

D

X = CoH$$_2$$O$$_4$$Cl$$_2^+$$, Y = CoCl$$_4^{2-}$$, Z = Tetrahedral

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 45

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The correct order of melting point of dichlorobenzenes is

A

B

C

D

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 46

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An organic compound 'A' with empirical formula C$$_6$$H$$_6$$O gives sooty flame on burning. Its reaction with bromine solution in low polarity solvent results in high yield of B. B is

A

B

C

D

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 47

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Propanal reacts with methanal according to the following sequence:

$$\mathrm{Propanal+Methanal\xrightarrow{(i)\ dil.\ NaOH}\xrightarrow{(ii)\ \Delta}\xrightarrow{(iii)\ NaCN}\xrightarrow{(iv)\ H_3O^+}B}$$

The molecular formula of product $$B$$ is:

$$C_5H_8O_3$$

Identify the correct statement regarding product $$B$$.

A

optically active and adds one mole of bromine

B

racemic mixture and is neutral

C

racemic mixture and gives a gas with saturated NaHCO$$_3$$ solution

D

optically active alcohol and is neutral

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 48

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A

B

C

D

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 49

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Which of the following artificial sweeteners has the highest sweetness value in comparison to cane sugar?

A

Aspartame

B

Sucralose

C

Alitame

D

Saccharin

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 50

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A protein 'X' with molecular weight of 70,000 u, on hydrolysis gives amino acids. One of these amino acid is

A

B

C

D

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 51

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On complete combustion, 0.492 g of an organic compound gave 0.792 g of CO$$_2$$. The % of carbon in the organic compound is (Nearest integer)

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 52

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Zinc reacts with hydrochloric acid to give hydrogen and zinc chloride. The volume of hydrogen gas produced at STP from the reaction of 11.5 g of zinc with excess HCl is L (Nearest integer)
(Given: Molar mass of Zn is 65.4 g mol$$^{-1}$$ and Molar volume of H$$_2$$ at STP = 22.7 L)

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 53

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The enthalpy change for the conversion of $$\dfrac{1}{2}$$Cl$$_2$$(g) to Cl$$^-$$(aq) is (-) ______ kJmol$$^{-1}$$ (Nearest integer)
Given: $$\Delta_{dis}H^0_{Cl_2(g)} = 240$$ kJmol$$^{-1}$$
$$\Delta_{eg}H^o_{Cl(g)} = -350$$ kJmol$$^{-1}$$
$$\Delta_{hyd}H^o_{Cl^-(g)} = -380$$ kJmol$$^{-1}$$

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 54

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For reaction: $$SO_2(g) + \dfrac{1}{2}O_2(g) \rightleftharpoons SO_3(g)$$ $$K_P = 2 \times 10^{12}$$ at 27°C and 1 atm pressure. The $$K_c$$ for the same reaction is ______ $$\times 10^{13}$$. (Nearest integer)
(Given $$R = 0.082$$ L atm K$$^{-1}$$ mol$$^{-1}$$)

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 55

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The total pressure of a mixture of non-reacting gases X(0.6 g) and Y(0.45 g) in a vessel is 740 mm of Hg. The partial pressure of the gas X is mm of Hg. (Nearest Integer)
(Given: molar mass X = 20 and Y = 45 g mol$$^{-1}$$)

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 56

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At 27°C, a solution containing 2.5 g of solute in 250.0 mL of solution exerts an osmotic pressure of 400 Pa. The molar mass of the solute is g mol$$^{-1}$$ (Nearest integer)
(Given: R = 0.083 L bar$$^{-1}$$ mol$$^{-1}$$)

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 57

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The logarithm of equilibrium constant for the reaction $$Pd^{2+} + 4Cl^- \rightleftharpoons PdCl_4^{2-}$$ is (Nearest integer)
Given: $$\dfrac{2.303RT}{F} = 0.06$$ V
$$Pd^{2+}_{(aq)} + 2e^- \rightleftharpoons Pd(s)$$ $$E^o = 0.83$$ V
$$PdCl_4^{2-}(aq) + 2e^- \rightleftharpoons Pd(s) + 4Cl^-(aq)$$ $$
$$E^o = 0.65$$ V

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 58

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$$A \rightarrow B$$
The rate constants of the above reaction at 200 K and 300 K are 0.03 min$$^{-1}$$ and 0.05 min$$^{-1}$$ respectively. The activation energy for the reaction is J (Nearest integer)
(Given: ln 10 = 2.3, R = 8.3 J K$$^{-1}$$ mol$$^{-1}$$, log 5 = 0.70, log 3 = 0.48, log 2 = 0.30)

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 59

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The oxidation state of phosphorus in hypophosphoric acid is

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NTA JEE Main 31st January 2023 Shift 1 - Chemistry - Question 60

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How many of the transformation given below would result in aromatic amines?

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