NTA JEE Main 31st August 2021 Shift 2 - Chemistry

NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 31

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The incorrect expression among the following is:

A

For isothermal process $$w_{reversible} = -nRT \ln\frac{V_f}{V_i}$$

B

$$\ln K = \frac{\Delta H° - T\Delta S°}{RT}$$

C

$$\frac{\Delta G_{System}}{\Delta S_{Total}} = -T$$ (at constant P)

D

$$K = e^{-\Delta G°/RT}$$

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 32

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In which one of the following sets all species show disproportionation reaction?

A

ClO$$_4^-$$, MnO$$_4^-$$, ClO$$_2^-$$ and F$$_2$$

B

MnO$$_4^{2-}$$, ClO$$_2$$, Cl$$_2$$ and Mn$$^{3+}$$

C

Cr$$_2$$O$$_7^{2-}$$, MnO$$_4^-$$, ClO$$_2^-$$ and Cl$$_2$$

D

ClO$$_2^-$$, F$$_2$$, MnO$$_4^-$$ and Cr$$_2$$O$$_7^{2-}$$

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 33

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Which one of the following statements is incorrect?

A

Atomic hydrogen is produced when H$$_2$$ molecules at a high temperature are irradiated with UV radiation.

B

At around 2000 K, the dissociation of dihydrogen into its atoms is nearly 8.1%

C

Bond dissociation enthalpy of H$$_2$$ is highest among diatomic gaseous molecules which contain a single bond.

D

Dihydrogen is produced on reacting zinc with HCl as well as NaOH$$(aq)$$.

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NTA JEE Main 31st August 2021 Shift 2 - 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): Lithium salts are hydrated.
Reason (R): Lithium has higher polarising power than other alkali metal group members.
In the light of the above statements, choose the most appropriate answer from the options given below:

A

(A) is not correct but (R) is correct.

B

(A) is correct but (R) is not correct.

C

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

D

Both (A) and (R) are correct and (R) is the correct explanation of (A).

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 35

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Match List - I with List - II:
List - I (Metal ion)     List - II (Group in Qualitative analysis)
(a) Mn$$^{2+}$$     (i) Group - III
(b) As$$^{3+}$$     (ii) Group - IIA
(c) Cu$$^{2+}$$     (iii) Group - IV
(d) Al$$^{3+}$$     (iv) Group - IIB
Choose the most appropriate answer from the options given below:

A

(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

B

(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

C

(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)

D

(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 36

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Arrange the following conformational isomers of n-butane in order of their increasing potential energy:

A

I < III < IV < II

B

I < IV < III < II

C

II < IV < III < I

D

II < III < IV < I

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 37

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Identify correct A, B and C in the reaction sequence given below:

A

B

C

D

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 38

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For the following sequence of reactions, the correct products are:

A

B

C

D

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 39

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The deposition of X and Y on ground surfaces is referred as wet and dry depositions, respectively. X and Y are:

A

X = CO$$_2$$, Y = SO$$_2$$

B

X = Ammonium salts, Y = SO$$_2$$

C

X = Ammonium salts, Y = CO$$_2$$

D

X = SO$$_2$$, Y = Ammonium salts

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 40

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Match List - I with List - II:
List - I (Parameter)                                         List - II (Unit)
(a) Cell constant                                            (i) S cm$$^2$$ mol$$^{-1}$$
(b) Molar conductivity                                   (ii) Dimensionless
(c) Conductivity                                            (iii) m$$^{-1}$$
(d) Degree of dissociation of electrolyte     (iv) $$\Omega^{-1}$$ m$$^{-1}$$
Choose the most appropriate answer:

A

(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

B

(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)

C

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

D

(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 41

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The number of S = O bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are:

A

1, 4 and 3

B

1, 4 and 4

C

2, 3 and 4

D

2, 4 and 3

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 42

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Which one of the following correctly represents the order of stability of oxides, X$$_2$$O; (X = halogen)?

A

Cl > I > Br

B

Br > Cl > I

C

I > Cl > Br

D

Br > I > Cl

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 43

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The Eu$$^{2+}$$ ion is a strong reducing agent in spite of its ground state electronic configuration (outermost):
[Atomic number of Eu = 63]

A

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

B

$$4f^7$$

C

$$4f^7 6s^2$$

D

$$4f^6$$

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 44

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Spin only magnetic moment in BM of FeCO$$_4$$C$$_2$$O$$_4^+$$ is:

A

5.92

B

1

C

0

D

1.73

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 45

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The major product of the following reaction is:

A

B

C

D

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 46

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For the reaction given below:

The compound which is not formed as a product in the reaction is a:

A

diol

B

monocarboxylic acid

C

compound with both alcohol and acid functional groups

D

dicarboxylic acid

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 47

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The structures of A and B formed in the following reaction are: Ph = -C$$_6$$H$$_5$$

A

B

C

D

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 48

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The major products A and B formed in the following reaction sequence are:

A

B

C

D

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 49

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Which among the following is not a polyester?

A

Glyptal

B

PHBV

C

Novolac

D

Dacron

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 50

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Which of the following is NOT an example of fibrous protein?

A

Keratin

B

Albumin

C

Myosin

D

Collagen

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 51

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The value of magnetic quantum number of the outermost electron of Zn$$^+$$ ion is _________. (Integer answer)

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 52

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According to molecular orbital theory, the number of unpaired electron(s) in O$$_2^{2-}$$ is _________.

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 53

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The pH of a solution obtained by mixing 50 mL of 1 M HCl and 30 mL of 1 M NaOH is $$x \times 10^{-4}$$. The value of x is _________. (Nearest integer)
log 2.5 = 0.3979

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 54

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The transformation occurring in Duma's method is given below
$$C_2H_7N + 2x + \frac{y}{2}CuO \rightarrow xCO_2 + \frac{y}{2}H_2O + \frac{z}{2}N_2 + 2x + \frac{y}{2}Cu$$
The value of y is _________. (Integer answer)

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 55

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The empirical formula for a compound with a cubic close packed arrangement of anions and with cations occupying all the octahedral sites in A$$_x$$B. The value of x is _________. (Integer answer)

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 56

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Sodium oxide reacts with water to produce sodium hydroxide. 20.0 g of sodium oxide is dissolved in 500 mL of water. Neglecting the change in volume, the concentration of the resulting NaOH solution is _________ $$\times 10^{-1}$$ M. (Nearest integer)
[Atomic mass : Na = 23.0, O = 16.0, H = 1.0]

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 57

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1.22 g of an organic acid is separately dissolved in 100 g of benzene (K$$_b$$ = 2.6 K kg mol$$^{-1}$$) and 100 g of acetone (K$$_b$$ = 1.7 K kg mol$$^{-1}$$). The acid is known to dimerize in benzene but remain as a monomer in acetone. The boiling point of the solution in acetone increases by 0.17°C. The increase in boiling point of solution in benzene in °C is $$x \times 10^{-2}$$. The value of x is _________. (Nearest integer)
[Atomic mass : C = 12.0, H = 1.0, O = 16.0]

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 58

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For the reaction A $$\rightarrow$$ B, the rate constant k (in s$$^{-1}$$) is given by
$$\log_{10} k = 20.35 - \frac{2.47 \times 10^3}{T}$$
The energy of activation in kJ mol$$^{-1}$$ is _________. (Nearest integer)
[Given : R = 8.314 J K$$^{-1}$$ mol$$^{-1}$$]

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 59

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CH$$_4$$ is adsorbed on 1 g charcoal at 0°C following the Freundlich adsorption isotherm. 10.0 mL of CH$$_4$$ is adsorbed at 100 mm of Hg, whereas 15.0 mL is adsorbed at 200 mm of Hg. The volume of CH$$_4$$ adsorbed at 300 mm of Hg is $$10^x$$ mL. The value of x is _________ $$\times 10^{-2}$$. (Nearest integer)
[Use $$\log_{10} 2 = 0.3010$$, $$\log_{10} 3 = 0.4771$$]

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NTA JEE Main 31st August 2021 Shift 2 - Chemistry - Question 60

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In the electrolytic refining of blister copper, the total number of main impurities, from the following, removed as anode mud is _________.
Pb, Sb, Se, Te, Ru, Ag, Au and Pt

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