NTA JEE Main 2nd September 2020 Shift 1 - Chemistry

NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 26

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The figure that is not a direct manifestation of the quantum nature of atom is:

A

B

C

D

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 27

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In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is:

A

Ionization enthalpy

B

Electronegativity

C

Electron gain enthalpy

D

Atomic radius

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 28

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If $$AB_4$$ molecule is a polar molecule, a possible geometry of $$AB_4$$ is:

A

Square pyramidal

B

Tetrahedral

C

Rectangular planar

D

Square planar

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 29

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Which one of the following graphs is not correct for ideal gas?
d = Density, P = Pressure, T = Temperature

A

I

B

II

C

IV

D

III

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 30

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For the following Assertion and Reason, the correct option is:
Assertion (A): When Cu (II) and sulphide ions are mixed, they react together extremely quickly to give a solid.
Reason (R): The equilibrium constant of $$Cu^{2+}(aq) + S^{2-}(aq) \rightleftharpoons CuS(s)$$ is high because the solubility product is low.

A

(A) is false and (R) is true.

B

Both (A) and (R) are false.

C

Both (A) and (R) are true but (R) is not the explanation for (A).

D

Both (A) and (R) are true and (R) is the explanation for (A).

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 31

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An open beaker of water in equilibrium with water vapour is in a sealed container. When a few grams of glucose are added to the beaker of water, the rate at which water molecules:

A

leaves the vapour increases

B

leaves the solution increases

C

leaves the solution decreases

D

leaves the vapour decreases

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 32

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While titration dilute HCl solution with aqueous NaOH, which of the following will not be required?

A

Burette and porcelain tile

B

Pipette and distilled water

C

Clamp and phenolphthalein

D

Bunsen burner and measuring cylinder

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 33

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The metal mainly used in devising photoelectric cells is:

A

Na

B

Li

C

Rb

D

Cs

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 34

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On heating compound (A) gives a gas (B) which is constituent of air. This gas when treated with $$H_2$$ in the presence of a catalyst gives another gas (C) which is basic in nature. (A) should not be:

A

$$NaN_3$$

B

$$Pb(NO_3)_2$$

C

$$(NH_4)_2Cr_2O_7$$

D

$$NH_4NO_2$$

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 35

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In Carius method of estimation of halogen, 0.172 g of an organic compound showed presence of 0.08 g of bromine. Which of these is the correct structure of the compound?

A

$$CH_3CHBr_2$$

B

C

D

$$H_3C - CH_2 - Br$$

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 36

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The increasing order of the following compounds towards HCN addition is:

A

$$(i) < (iii) < (iv) < (ii)$$

B

$$(iii) < (iv) < (i) < (ii)$$

C

$$(iii) < (i) < (iv) < (ii)$$

D

$$(iii) < (iv) < (ii) < (i)$$

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 37

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The IUPAC name for the following compound is:

A

2, 5-dimethyl-5-carboxy-hex-3-enal

B

2, 5-dimethyl-6-carboxy-hex-3-enal

C

2,5-dimethyl-6-oxo-hex-3-enoic acid

D

6-formyl-2-methyl-hex-3-enoic acid

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 38

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The major product in the following reaction is:

A

B

C

D

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 39

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The statement that is not true about ozone is:

A

in the stratosphere, CFCs release chlorine free radicals (Cl) which reacts with $$O_3$$ to give chlorine

B

in the atmosphere, it is depleted by CFCs.

C

in the stratosphere, it forms a protective shield against UV radiation.

D

It is a toxic gas and its reaction with NO gives $$NO_2$$

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 40

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Which of the following is used for the preparation of colloids?

A

Ostwald process

B

Van Arkel Method

C

Bredig's Arc Method

D

Mond Process

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 41

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Consider that $$d^6$$ metal ion $$(M^{2+})$$ forms a complex with aqua ligands, and the spin only magnetic moment of the complex is 4.90 BM. The geometry and the crystal field stabilization energy of the complex is:

A

octahedral and $$-2.4\Delta_0 + 2P$$

B

tetrahedral and $$-0.6\Delta_t$$

C

octahedral and $$-1.6\Delta_0$$

D

tetrahedral and $$-1.6\Delta_t + 1P$$

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 42

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For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements:
(I) both the complexes can be high spin.
(II) Ni(II) complex can very rarely be of low spin.
(III) with strong field ligands, Mn(II) complexes can be low spin.
(IV) aqueous solution of Mn(II) ions is yellow in color.
The correct statements are:

A

(I) and (II) only

B

(I), (II) and (IV) only

C

(I), (II) and (III) only

D

(II), (III) and (IV) only

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 43

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Which of the following compounds will show retention in configuration on nucleophilic substitution by $$OH^-$$ ion?

A

B

C

D

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 44

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The major aromatic product C in the following reaction sequence will be:

A

B

C

D

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 45

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Consider the following reactions:
(i) Glucose + ROH $$\xrightarrow{dry \; HCl}$$ Acetal $$\xrightarrow{x \; eq. \; of \; (CH_3CO)_2O}$$ acetyl derivative
(ii) Glucose $$\xrightarrow{Ni/H_2}$$ A $$\xrightarrow{y \; eq. \; of \; (CH_3CO)_2O}$$ acetyl derivative
(iii) Glucose $$\xrightarrow{z \; eq. \; of \; (CH_3CO)_2O}$$ acetyl derivative
'x', 'y' and 'z' in these reactions are respectively:

A

5, 4 & 6

B

4, 6 & 5

C

4, 5 & 5

D

5, 6 & 5

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 46

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The Gibbs energy change (in J) for the given reaction at $$[Cu^{2+}] = [Sn^{2+}] = 1$$ M and 298 K is:
$$Cu(s) + Sn^{2+}(aq.) \to Cu^{2+}(aq.) + Sn(s)$$;
$$(E^0_{Sn^{2+}|Sn} = -0.16 \; V, E^0_{Cu^{2+}|Cu} = 0.34 \; V, \text{Take } F = 96500 \; C \; mol^{-1})$$

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 47

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The internal energy change (in J) when 90 g of water undergoes complete evaporation at 100$$°$$C is ___________.
(Given: $$\Delta H_{vap}$$ for water at 373 K $$= 41$$ kJ/mol, R $$= 8.314$$ J K$$^{-1}$$ mol$$^{-1}$$)

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 48

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The number of chiral carbons present in the molecule given below is ___________.

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 49

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The mass of gas adsorbed, x, per unit mass of adsorbate, m, was measured at various pressures, p. A graph between $$\log \frac{x}{m}$$ and $$\log p$$ gives a straight line with slope equal to 2 and the intercept equal to 0.4771. The value of $$\frac{x}{m}$$ at a pressure of 4 atm is:
(Given $$\log 3 = 0.4771$$)

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NTA JEE Main 2nd September 2020 Shift 1 - Chemistry - Question 50

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The oxidation states of iron atoms in compounds (A), (B) and (C), respectively, are x, y and z. Then sum of x, y and z is ___________.
(A) $$Na_4[Fe(CN)_5(NOS)]$$  (B)  $$Na_4[FeO_4]$$  (C)  $$[Fe_2(CO)_9]$$

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