NTA JEE Main 22nd July 2021 Shift 1 - Chemistry

NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 31

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Which one of the following statements for D.I. Mendeleeff, is incorrect?

A

He authored the textbook - Principles of Chemistry.

B

At the time, he proposed Periodic Table of elements structure of atom was known.

C

Element with atomic number 101 is named after him.

D

He invented accurate barometer.

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 32

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Match List-I with List-II

(a) SF$$_4$$	(i) sp$$^3$$d$$^2$$
(b) IF$$_5$$	(ii) d$$^2$$sp$$^3$$
(c) NO$$_2^+$$	(iii) sp$$^3$$d
(d) NH$$_4^+$$	(iv) sp$$^3$$
	(v) sp

Choose the correct answer from the options given below:

A

(a)-(i), (b)-(ii), (c)-(v) and (d)-(iii)

B

(a)-(ii), (b)-(i), (c)-(iv) and (d)-(v)

C

(a)-(iii), (b)-(i), (c)-(v) and (d)-(iv)

D

(a)-(iv), (b)-(iii), (c)-(ii) and (d)-(v)

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 33

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Match List-I with List-II

(a) Ba	(i) Organic solvent soluble compounds
(b) Ca	(ii) Outer electronic configuration 6s$$^2$$
(c) Li	(iii) Oxalate insoluble in water
(d) Na	(iv) Formation of very strong monoacidic base

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 34

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Given below are the statements about diborane
(a) Diborane is prepared by the oxidation of NaBH$$_4$$ with I$$_2$$
(b) Each boron atom is in sp$$^2$$ hybridized state
(c) Diborane has one bridged 3 centre-2-electron bond
(d) Diborane is a planar molecule
The option with correct statement(s) is

A

(c) and (d) only

B

(a) only

C

(c) only

D

(a) and (b) only

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 35

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Which purification technique is used for high boiling organic liquid compound (decomposes near its boiling point)?

A

Simple distillation

B

Steam distillation

C

Fractional distillation

D

Reduced pressure distillation

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 36

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Which of the following compounds does not exhibit resonance?

A

CH$$_3$$CH$$_2$$OCH=CH$$_2$$

B

C

CH$$_3$$CH$$_2$$CH$$_2$$CONH$$_2$$

D

CH$$_3$$CH$$_2$$CH=CHCH$$_2$$NH$$_2$$

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 37

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Which of the following molecules does not show stereo isomerism?

A

3, 4-Dimethylhex-3-ene

B

3-Methylhex-1-ene

C

3-Ethylhex-3-ene

D

4-Methylhex-1-ene

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 38

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In the chemical reactions given above A and B respectively are:

A

H$$_3$$PO$$_2$$ and CH$$_3$$CH$$_2$$Cl

B

CH$$_3$$CH$$_2$$OH and H$$_3$$PO$$_2$$

C

H$$_3$$PO$$_2$$ and CH$$_3$$CH$$_2$$OH

D

CH$$_3$$CH$$_2$$Cl and H$$_3$$PO$$_2$$

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 39

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The water having more dissolved O$$_2$$ is:

A

boiling water

B

water at 80$$^\circ$$C

C

polluted water

D

water at 4$$^\circ$$C

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 40

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Which one of the following 0.06 M aqueous solutions has lowest freezing point?

A

Al$$_2$$(SO$$_4$$)$$_3$$

B

C$$_6$$H$$_{12}$$O$$_6$$

C

KI

D

K$$_2$$SO$$_4$$

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 41

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Isotope(s) of hydrogen which emits low energy $$\beta^-$$ particles with $$t_{1/2}$$ value > 12 years is/are

A

Protium

B

Tritium

C

Deuterium

D

Deuterium and Tritium

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 42

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When silver nitrate solution is added to potassium iodide solution then the sol produced is:

A

AgI / I$$^-$$

B

AgI / Ag$$^+$$

C

KI / NO$$_3^-$$

D

AgNO$$_3$$ / NO$$_3^-$$

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 43

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Sulphide ion is soft base and its ores are common for metals
(a) Pb (b) Al (c) Ag (d) Mg
Choose the correct answer from the options given below

A

a and c only

B

a and d only

C

a and b only

D

c and d only

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 44

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Which one of the following group-15 hydride is the strongest reducing agent?

A

AsH$$_3$$

B

BiH$$_3$$

C

PH$$_3$$

D

SbH$$_3$$

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 45

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The set having ions which are coloured and paramagnetic both is -

A

Cu$$^{2+}$$, Cr$$^{3+}$$, Sc$$^+$$

B

Cu$$^{2+}$$, Zn$$^{2+}$$, Mn$$^{4+}$$

C

Sc$$^{3+}$$, V$$^{5+}$$, Ti$$^{4+}$$

D

Ni$$^{2+}$$, Mn$$^{7+}$$, Hg$$^{2+}$$

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 46

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Which of the following compounds will provide a tertiary alcohol on reaction with excess of CH$$_3$$MgBr followed by hydrolysis?

A

B

C

D

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 47

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An organic compound A (C$$_6$$H$$_6$$O) gives dark green colouration with ferric chloride. On treatment with CHCl$$_3$$ and KOH, followed by acidification gives compound B. Compound B can also be obtained from compound C on reaction with pyridinium chlorochromate (PCC). Identify A, B and C.

A

B

C

D

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 48

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Which one of the following reactions does not occur?

A

B

C

D

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 49

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Match List-I with List-II :

(a) Chloroprene	(i)
(b) Neoprene	(ii)
(c) Acrylonitrile	(iii)
(d) Isoprene	(iv) CH$$_2$$=CH-CN

Choose the correct answer from the options given

A

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

B

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

C

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

D

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

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 50

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Thiamine and pyridoxine are also known respectively as:

A

Vitamin B$$_2$$ and Vitamin E

B

Vitamin E and Vitamin B$$_2$$

C

Vitamin B$$_6$$ and Vitamin B$$_2$$

D

Vitamin B$$_1$$ and Vitamin B$$_6$$

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 51

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Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene (Nearest integer)

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 52

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Number of electrons that Vanadium (Z = 23) has in p-orbitals is equal to:

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 53

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If the standard molar enthalpy change for combustion of graphite powder is $$-2.48 \times 10^2$$ kJ mol$$^{-1}$$, the amount of heat generated on combustion of 1 g of graphite powder in kJ (Nearest integer):

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 54

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Value of K$$_P$$ for the equilibrium reaction N$$_2$$O$$_4$$(g) $$\rightleftharpoons$$ 2NO$$_2$$(g) at 288 K is 47.9. The K$$_C$$ for this reaction at same temperature is (Nearest integer)
(R = 0.083 L bar K$$^{-1}$$ mol$$^{-1}$$)

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 55

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The number of acyclic structural isomers (including geometrical isomers) for pentene are ___.

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 56

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A copper complex crystallising in a CCP lattice with a cell edge of 0.4518 nm has been revealed by employing X-ray diffraction studies. The density of a copper complex is found to be 7.62 g cm$$^{-3}$$. The molar mass of copper complex is ___ gmol$$^{-1}$$
(Nearest integer): [Given : N$$_A$$ = 6.022 $$\times 10^{23}$$ mol$$^{-1}$$]

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 57

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If the concentration of glucose (C$$_6$$H$$_{12}$$O$$_6$$) in blood is 0.72 gL$$^{-1}$$, the molarity of glucose in blood is ___ $$\times 10^{-3}$$M (Nearest integer):
[Given : Atomic mass of C = 12, H = 1, O = 16 u]

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 58

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Assume a cell with the following reaction Cu$$_{(s)}$$ + 2Ag$$^+$$(1 $$\times 10^{-3}$$M) $$\to$$ Cu$$^{2+}$$(0.250M) + 2Ag$$_{(s)}$$
E$$^\circ_{cell}$$ = 2.97 V
E$$_{cell}$$ for the above reaction is ___ V.
(Nearest integer)
[Given : log 2.5 = 0.3979, T = 298 K]

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 59

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N$$_2$$O$$_{5(g)} \to$$ 2NO$$_{2(g)}$$ + $$\frac{1}{2}$$O$$_{2(g)}$$
In the above first order reaction the initial concentration of N$$_2$$O$$_5$$ is $$2.40 \times 10^{-2}$$ mol L$$^{-1}$$ at 318 K. The concentration of N$$_2$$O$$_5$$ after 1 hour was $$1.60 \times 10^{-2}$$ mol L$$^{-1}$$. The rate constant of the reaction at 318 K is ___ $$\times 10^{-3}$$ min$$^{-1}$$ (Nearest integer):
[Given : log 3 = 0.477, log 5 = 0.699]

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NTA JEE Main 22nd July 2021 Shift 1 - Chemistry - Question 60

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The total number of unpaired electrons present in [Co(NH$$_3$$)$$_6$$]Cl$$_2$$ and [Co(NH$$_3$$)$$_6$$]Cl$$_3$$ is ___.

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