NTA JEE Main 9th January 2020 Shift 2 - Chemistry

NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 26

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The first and second ionisation enthalpies of a metal are 496 and 4560 kJ mol$$^{-1}$$, respectively. How many moles of HCl and H$$_2$$SO$$_4$$, respectively, will be needed to react completely with 1 mole of the metal hydroxide?

A

1 and 1

B

2 and 0.5

C

1 and 2

D

1 and 0.5

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 27

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A mixture of gases $$O_2$$, $$H_2$$ and CO are taken in a closed vessel containing charcoal. The graph that represents the correct behaviour of pressure with time is:

A

B

C

D

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 28

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The true statement amongst the following is:

A

Both $$\Delta S$$ and $$S$$ are functions of temperature.

B

Both $$S$$ and $$\Delta S$$ are not functions of temperature

C

$$S$$ is not a function of temperature but $$\Delta S$$ is a function of temperature

D

$$S$$ is a function of temperature but $$\Delta S$$ is not a function of temperature

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 29

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In the figure shown below reactant A (represented by square) is in equilibrium with product B (represented by circle). The equilibrium constant is (approx):

A

4

B

8

C

1

D

2

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 30

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The solubility product of $$Cr(OH)_3$$ at 298K is $$6.0 \times 10^{-31}$$. The concentration of hydroxide ions in a saturated solution of $$Cr(OH)_3$$ will be:

A

$$\left(2.22 \times 10^{-31}\right)^{\frac{1}{4}}$$

B

$$\left(18 \times 10^{-31}\right)^{\frac{1}{4}}$$

C

$$\left(18 \times 10^{-31}\right)^{\frac{1}{2}}$$

D

$$\left(4.86 \times 10^{-29}\right)^{\frac{1}{4}}$$

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 31

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5g of zinc is treated separately with an excess of
(a) dilute hydrochloric acid and
(b) aqueous sodium hydroxide.
The ratio of the volumes of $$H_2$$ evolved in these two reactions is:

A

1 : 2

B

1 : 1

C

1 : 4

D

2 : 1

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 32

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Among the statements (a) - (d), the correct ones are:
(a) Lithium has the highest hydration enthalpy among the alkali metals.
(b) Lithium chloride is insoluble in pyridine.
(c) Lithium cannot form ethynide upon its reaction with ethyne.
(d) Both lithium and magnesium react slowly with $$H_2O$$.

A

(a), (b) and (d) only

B

(a), (c) and (d) only

C

(b) and (c) only

D

(a) and (d) only

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 33

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The reaction of $$H_3N_3B_3Cl_3(A)$$ with $$LiBH_4$$ in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of (A) with (C) leads to $$H_3N_3B_3(Me)_3$$. Compounds (B) and (C) respectively, are:

A

Bogging god MeBr

B

Diborane and MeMgBr

C

Boron nitride and MeBr

D

Borazine and MeMgBr

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 34

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Which of the following has the shortest C - Cl bond?

A

$$Cl - CH = CH_2$$

B

$$Cl - CH = CH - NO_2$$

C

$$Cl - CH = CH - CH_3$$

D

$$Cl - CH = CH - OCH_3$$

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 35

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Which of the following reactions will not produce a racemic product?

A

B

C

$$CH_{3}CH_{2}CH = CH_{2} \xrightarrow{HBr}$$

D

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 36

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The number of $$sp^2$$ hybrid orbitals in a molecule of benzene is:

A

24

B

6

C

18

D

12

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 37

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Biochemical Oxygen Demand (BOD) is the amount of oxygen required (in ppm):

A

for sustaining life in a water body.

B

by bacteria to break-down organic waste in a certain volume of a water sample.

C

for the photochemical breakdown of waste present in 1 m$$^3$$ volume of a water body

D

by anaerobic bacteria to breakdown inorganic waste present in a water body.

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 38

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Amongst the following, the form of water with the lowest ionic conductance at 298K is:

A

distilled water

B

saline water used for intravenous injection

C

water from a well

D

sea water

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 39

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The correct order of the spin-only magnetic moments of the following complexes is:
(I) $$[Cr(H_2O)_6]Br_2$$
(II) $$Na_4[Fe(CN)_6]$$
(III) $$Na_3[Fe(C_2O_4)_3]$$ $$(\Delta_0 \gt P)$$
(IV) $$(Et_4N)_2[CoCl_4]$$

A

$$(III) \gt (I) \gt (IV) \gt (II)$$

B

$$(III) \gt (I) \gt (II) \gt (IV)$$

C

$$(I) \gt (IV) \gt (III) \gt (II)$$

D

$$(II) \approx (I) \gt (IV) \gt (III)$$

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 40

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The isomer(s) of $$[Co(NH_3)_4Cl_2]$$ that has/have a Cl - Co - Cl angle of 90$$°$$, is/are:

A

meridional and trans

B

cis and trans

C

trans only

D

cis only

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 41

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In the following reaction A is:

A

B

C

D

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 42

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Consider the following reactions,

The compound [P] is:

A

B

C

D

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 43

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The decreasing order of basicity of the following amines is:

A

$$(I) > (III) > (IV) > (II)$$

B

$$(III) > (I) > (II) > (IV)$$

C

$$(II) > (III) > (IV) > (I)$$

D

$$(III) > (II) > (I) > (IV)$$

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 44

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Which polymer has 'chiral' monomer(s)?

A

Neoprene

B

Buna-N

C

Nylon 6,6

D

PHBV

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 45

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A, B and C are three biomolecules. The results of the tests performed on them are given below:

	Molisch's test	Barfoed Test	Biuret Test
A	Positive	Negative	Negative
B	Positive	Positive	Negative
C	Negative	Negative	Positive

A, B and C are respectively:

A

A = Glucose, B = Fructose, C = Albumin

B

A = Lactose, B = Glucose, C = Albumin

C

A = Lactose, B = Glucose, C = Alanine

D

A = Lactose, B = Fructose, C = Alanine

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 46

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10.30 mg of $$O_2$$ is dissolved into a liter of sea water of density 1.03 g/mL. The concentration of $$O_2$$ in ppm is ___________.

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 47

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A cylinder containing an ideal gas (0.1 mol of 1.0 dm$$^3$$) is in thermal equilibrium with a large volume of 0.5 molal aqueous solution of ethylene glycol at its freezing point. If the stoppers $$S_1$$ and $$S_2$$ (as shown in the figure) are suddenly withdrawn, the volume of the gas in litres after equilibrium is achieved will be ___________.
(Given, $$K_f$$(water) $$= 2.0$$ K kg mol$$^{-1}$$, R $$= 0.08$$ dm$$^3$$ atm K$$^{-1}$$ mol$$^{-1}$$)

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 48

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A sample of milk splits after 60 min at 300K and after 40 min at 400K when the population of lactobacillus acidophilus in it doubles. The activation energy (in kJ/mol) for this process is closest to ___________.
(Given, $$R = 8.3$$ J mol$$^{-1}$$ K$$^{-1}$$, $$\ln\left(\frac{2}{3}\right) = 0.4$$, $$e^{-3} = 4.0$$)

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 49

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The sum of the total number of bonds between chromium and oxygen atoms in chromate and dichromate ions is ___________.

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NTA JEE Main 9th January 2020 Shift 2 - Chemistry - Question 50

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Consider the following reactions: $$A \xrightarrow[(ii)H_3O^+]{(i)CH_3MBr}B \xrightarrow[573K]{Cu} 2-methyl-2-butene$$. The mass percentage of carbon in A is ___________.

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