NTA JEE Main 10th April 2019 Shift 1 - Chemistry

NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 31

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At 300 K and 1 atmospheric pressure, 10 mL of a hydrocarbon required 55 mL of O$$_2$$ for complete combustion, and 40 mL of CO$$_2$$ is formed. The formula of the hydrocarbon is:

A

C$$_4$$H$$_8$$

B

C$$_4$$H$$_{10}$$

C

C$$_4$$H$$_6$$

D

C$$_4$$H$$_7$$Cl

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 32

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The graph between $$|\psi|^2$$ and r (radical distance) is shown below. This represents:

A

3s orbital

B

2p orbital

C

2s orbital

D

1s orbital

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 33

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The isoelectronic set of ions is:

A

F$$^-$$, Li$$^+$$, Na$$^+$$ and Mg$$^{2+}$$

B

N$$^{3-}$$, Li$$^+$$, Mg$$^{2+}$$ and O$$^{2-}$$

C

N$$^{3-}$$, O$$^{2-}$$, F$$^-$$ and Na$$^+$$

D

Li$$^+$$, Na$$^+$$, O$$^{2-}$$ and F$$^-$$

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 34

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During the change of O$$_2$$ to O$$_2^-$$, the incoming electron goes to the orbital:

A

$$\pi$$ 2p$$_x$$

B

$$\pi^*$$ 2p$$_x$$

C

$$\pi$$ 2p$$_y$$

D

$$\sigma^*$$ 2p$$_z$$

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 35

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Consider the following table:

Gas    a/(kPa dm$$^6$$ mol$$^{-1}$$)    b/(dm$$^3$$ mol$$^{-1}$$)
A              642.32                    0.05196
B              155.21                    0.04136
C              431.91                    0.05196
D              155.21                    0.4382

a and b are van der Waals constants. The correct statement about the gases is:

A

Gas C will occupy more volume than gas A; gas B will be lesser compressible than gas D

B

Gas C will occupy lesser volume than gas A; gas B will be lesser compressible than gas D

C

Gas C will occupy more volume than gas A; gas B will be more compressible than gas D

D

Gas C will occupy lesser volume than gas A; gas B will be more compressible than gas D

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 36

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A process will be spontaneous at all temperatures if:

A

$$\Delta H < 0$$ and $$\Delta S < 0$$

B

$$\Delta H < 0$$ and $$\Delta S > 0$$

C

$$\Delta H > 0$$ and $$\Delta S > 0$$

D

$$\Delta H > 0$$ and $$\Delta S < 0$$

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 37

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Consider the following statements
(a) The pH of a mixture containing 400 mL of 0.1 M H$$_2$$SO$$_4$$ and 400 mL of 0.1 M NaOH will be approximately 1.3.
(b) Ionic product of water is temperature dependent.
(c) A monobasic acid with K$$_a$$ = 10$$^{-5}$$ has a pH = 5. The degree of dissociation of this acid is 50%.
(d) The Le Chatelier's principle is not applicable to common-ion effect.
The correct statements are:

A

(b) and (c)

B

(a), (b) and (d)

C

(a) and (b)

D

(a), (b) and (c)

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 38

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The synonym for water gas when used in the production of methanol is:

A

syn gas

B

laughing gas

C

natural gas

D

fuel gas

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 39

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The alloy used in the construction of aircrafts is:

A

Mg - Al

B

Mg - Mn

C

Mg - Sn

D

Mg - Zn

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 40

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The correct order of catenation is:

A

Ge > Sn > Si > C

B

C > Sn > Si ≈ Ge

C

C > Si > Ge ≈ Sn

D

Si > Sn > C > Ge

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 41

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The principle of column chromatography is:

A

Differential adsorption of the substances on the solid phase.

B

Differential absorption of the substances on the solid phase.

C

Gravitational force.

D

Capillary action

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 42

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The increasing order of the reactivity of the following compounds towards electrophilic aromatic substitution reactions is:

A

II < I < III

B

III < II < I

C

III < I < II

D

I < III < II

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 43

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The regions of the atmosphere, where clouds form and where we live, respectively, are:

A

Troposphere and Troposphere

B

Stratosphere and Stratosphere

C

Stratosphere and Troposphere

D

Troposphere and Stratosphere

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 44

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At room temperature, a dilute solution of urea is prepared by dissolving 0.60 g of urea in 360 g of water. If the vapour pressure of pure water at this temperature is 35 mm Hg, lowering of vapour pressure will be:
(molar mass of urea = 60 g mol$$^{-1}$$)

A

0.028 mm Hg

B

0.027 mm Hg

C

0.031 mm Hg

D

0.017 mm Hg

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 45

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Consider the statements S1 and S2:
S1: Conductivity always increases with decreases in the concentration of electrolyte.
S2: Molar conductivity always increases with decreases in the concentration of electrolyte.
The correct option among the following

A

S1 is wrong and S2 is correct

B

S1 is correct and S2 is wrong

C

Both S1 and S2 are correct

D

Both S1 and S2 are wrong

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 46

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A bacterial infection in an internal wound grows as N'(t) = N$$_0$$exp(t), where the time t is in hours. A dose of antibiotic, taken orally, needs 1 hour to reach the wound. Once it reaches there, the bacterial population goes down as $$\frac{dN}{dt} = -5N^2$$. What will be the plot of $$\frac{N_0}{N}$$ vs t after 1 hour?

A

B

C

D

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 47

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A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation
$$\frac{x}{m} = kp^{0.5}$$
Adsorption of the gas increases with:

A

Decrease in p and increase in T

B

Increase in p and decrease in T

C

Increase in p and increase in T

D

Decrease in p and decrease in T

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 48

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Match the refining methods (Column I) with metals (Column II).
      Column I                       Column II
(Refining methods)              (Metals)
(I)   Liquation                      (a) Zr
(II)  Zone Refining                (b) Ni
(III) Mond Process                (c) Sn
(IV) Van Arkel Method          (d) Ga

A

(I) - (b); (II) - (c); (III) - (d); (IV) - (a)

B

(I) - (b); (II) - (d); (III) - (a); (IV) - (c)

C

(I) - (c); (II) - (d); (III) - (b); (IV) - (a)

D

(I) - (c); (II) - (a); (III) - (b); (IV) - (d)

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 49

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The oxoacid of sulphur that does not contain bond between sulphur atom is:

A

H$$_2$$S$$_2$$O$$_7$$

B

H$$_2$$S$$_2$$O$$_4$$

C

H$$_2$$S$$_4$$O$$_6$$

D

H$$_2$$S$$_2$$O$$_3$$

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 50

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Consider the hydrated ions of Ti$$^{2+}$$, V$$^{2+}$$, Ti$$^{3+}$$ and Sc$$^{3+}$$. The correct order of their spin-only magnetic moments is:

A

Sc$$^{3+}$$ < Ti$$^{3+}$$ < V$$^{2+}$$ < Ti$$^{2+}$$

B

Ti$$^{3+}$$ < Ti$$^{2+}$$ < Sc$$^{3+}$$ < V$$^{2+}$$

C

Sc$$^{3+}$$ < Ti$$^{3+}$$ < Ti$$^{2+}$$ < V$$^{2+}$$

D

V$$^{2+}$$ < Ti$$^{2+}$$ < Ti$$^{3+}$$ < Sc$$^{3+}$$

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 51

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The species that can have a trans-isomer is:
(en = ethane-1, 2-diamine, ox = oxalate)

A

[Cr(en)$$_2$$(ox)]$$^+$$

B

[Pt(en)Cl$$_2$$]

C

[Zn(en)Cl$$_2$$]

D

[Pt(en)$$_2$$Cl$$_2$$]$$^{2+}$$

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 52

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Three complexes,
[CoCl(NH$$_3$$)$$_5$$]$$^{2+}$$(I), [Co(NH$$_3$$)$$_5$$H$$_2$$O]$$^{3+}$$(II) and [Co(NH$$_3$$)$$_6$$]$$^{3+}$$(III)
absorb light in the visible region. The correct order of the wavelength of light absorbed by them is:

A

(II) > (I) > (III)

B

(III) > (II) > (I)

C

(I) > (II) > (III)

D

(III) > (I) > (II)

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 53

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Increasing rate of S$$_N$$1 reaction in the following compounds is:

A

(I) < (II) < (III) < (IV)

B

(II) < (I) < (III) < (IV)

C

(II) < (I) < (IV) < (III)

D

(I) < (II) < (IV) < (III)

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 54

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The major product of the following reaction is:

A

B

C

D

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 55

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The major product of the following reaction is:

A

B

C

D

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 56

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Major products of the following reaction are:

A

CH$$_3$$OH and HCO$$_2$$H

B

C

D

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 57

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The major product of the following reaction is:

A

B

C

D

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 58

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Ethylamine (C$$_2$$H$$_5$$NH$$_2$$) can be obtained from N-ethylphthalimide on treatment with:

A

CaH$$_2$$

B

NH$$_2$$NH$$_2$$

C

H$$_2$$O

D

NaBH$$_4$$

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 59

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Which of the following is a condensation polymer?

A

Nylon 6, 6

B

Neoprene

C

Buna-S

D

Teflon

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NTA JEE Main 10th April 2019 Shift 1 - Chemistry - Question 60

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Amylopectin is composed of:

A

β - D - glucose, C$$_1$$ - C$$_4$$ and C$$_1$$ - C$$_6$$ linkages

B

α - D - glucose, C$$_1$$ - C$$_4$$ and C$$_2$$ - C$$_6$$ linkages

C

α - D - glucose, C$$_1$$ - C$$_4$$ and C$$_1$$ - C$$_6$$ linkages

D

β - D - glucose, C$$_1$$ - C$$_4$$ and C$$_2$$ - C$$_6$$ linkages

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