NTA JEE Main 10th April 2016 Online - Chemistry

NTA JEE Main 10th April 2016 Online - Chemistry - Question 31

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Aqueous solution of which of the following salts will not contain ions with the electronic configuration $$1s^2 2s^2 2p^6 3s^2 3p^6$$?

A

NaF

B

KBr

C

NaCl

D

$$CaI_2$$

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 32

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The following statements concern elements in the periodic table. Which of the following is true?

A

For group 15 elements, the stability of +5 oxidation state increases down the group.

B

Elements of group 16 have lower ionization enthalpy values compared to those of group 15 in the corresponding periods.

C

The group 13 elements are all metals.

D

All the elements in group 17 are gases.

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 33

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The bond angle H-X-H is the greatest in the compound:

A

$$PH_3$$

B

$$CH_4$$

C

$$NH_3$$

D

$$H_2O$$

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 34

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Initially, the root-mean-square (RMS) velocity of $$N_2$$ molecules at certain temperature is u. If this temperature is doubled and all the nitrogen molecules dissociate into nitrogen atoms, then the new RMS velocity will be:

A

2u

B

14u

C

4u

D

u/2

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 35

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If 100 mole of $$H_2O_2$$ decompose at 1 bar and 300 K, the work is done (kJ) by one mole of $$O_2(g)$$ as it expands against 1 bar pressure is:
$$2H_2O_2(l) \rightleftharpoons 2H_2O(l) + O_2(g)$$
$$(R = 8.3$$ J K$$^{-1}$$ mol$$^{-1})$$

A

124.50

B

249.00

C

498.00

D

62.25

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 36

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A solid XY kept in an evacuated sealed container undergoes decomposition to form a mixture of gases X and Y at temperature T. The equilibrium pressure is 10 bar in this vessel. $$K_p$$ for this reaction is?

A

25

B

100

C

10

D

5

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 37

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The volume of 0.1 M strong dibasic acid sufficient to neutralize 1 g of a base that furnishes 0.04 mole of $$OH^-$$ in aqueous solution is:

A

400 mL

B

600 mL

C

200 mL

D

800 mL

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 38

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What is the commercial name for calcium oxide?

A

Quick lime

B

Milk of lime

C

Slaked lime

D

Limestone

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 39

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Identify the reaction which does not liberate hydrogen

A

Reaction of lithium hydride with $$B_2H_6$$.

B

Electrolysis of acidified water using Pt electrodes.

C

Reaction of zinc with aqueous alkali.

D

Allowing a solution of sodium in liquid ammonia to stand.

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 40

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Assertion: Among the carbon allotropes, diamond is an insulator, whereas, graphite is a good conductor of electricity.
Reason: Hybridization of carbon in diamond and graphite are sp$$^3$$ and sp$$^2$$ respectively.

A

Both assertion and reason are correct, but the reason is not the correct explanation for the assertion.

B

Both assertion and reason are correct, but the reason is the correct explanation for the assertion.

C

Both assertion and reason are incorrect.

D

Assertion is incorrect statement, but the reason is correct.

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 41

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Sodium extract is heated with concentrated $$HNO_3$$ before testing for halogens because:

A

$$Ag_2S$$ and AgCN are soluble in acidic medium.

B

Silver halides are totally insoluble in nitric acid.

C

$$S^{2-}$$ and $$CN^-$$, if present, are decomposed by conc. $$HNO_3$$ and hence do not interfere in the test.

D

Ag reacts faster with halides in acidic medium

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 42

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Consider the reaction sequence below:

X is:

A

B

C

D

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 43

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Which one of the following substances used in dry cleaning is a better strategy to control environmental pollution?

A

Sulphur dioxide

B

Carbon dioxide

C

Nitrogen dioxide

D

Tetrachloroethylene

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 44

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An aqueous solution of a salt $$MX_2$$ at certain temperature has a Van't Hoff factor of 2. What is the degree of dissociation for this solution of the salt?

A

0.50

B

0.33

C

0.67

D

0.80

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 45

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Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing 0.2 Faraday electricity through an aqueous solution of potassium succinate, what is the total volume of gases (at both cathode and anode) at STP (1 atm and 273 K)?

A

8.96 L

B

4.48 L

C

6.72 L

D

2.24 L

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 46

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Identify the correct statement:

A

Corrosion of iron can be minimised by forming a contact with another metal with a higher reduction potential

B

Iron corrodes in oxygen-free water

C

Corrosion of iron can be minimised by forming an impermeable barrier at its surface

D

Iron corrodes more rapidly in salt water because its electrochemical potential is higher

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 47

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The rate law for the reaction below is given by the expression k[A][B]
$$A + B \to$$ Product
If the concentration of B is increased from 0.1 to 0.3 mol, keeping the value of A at 0.1 mol, the rate constant will be:

A

3k

B

9k

C

k/3

D

k

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 48

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Gold numbers of some colloids are Gelatin: 0.005 - 0.01, Gum Arabic: 0.15 - 0.25, Oleate: 0.04 - 1.0, Starch: 15 - 25. Which among the following is a better protective colloid?

A

Gelatin

B

Starch

C

Oleate

D

Gum Arabic

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 49

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Extraction of copper by smelting uses silica as an additive to remove.

A

$$Cu_2O$$

B

FeS

C

FeO

D

$$Cu_2S$$

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 50

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Identify the incorrect statement:

A

The S-S-S bond angles in the $$S_8$$ and $$S_6$$ rings are the same.

B

Rhombic and monoclinic Sulphur have $$S_8$$ molecules.

C

$$S_2$$ is paramagnetic like oxygen.

D

$$S_8$$ ring has a crown shape.

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 51

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Which of the following are the transition metal ions responsible for colour in ruby and emerald respectively?

A

$$Co^{3+}$$ and $$Cr^{3+}$$

B

$$Co^{3+}$$ and $$Co^{3+}$$

C

$$Cr^{3+}$$ and $$Cr^{3+}$$

D

$$Cr^{3+}$$ and $$Ag^+$$

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 52

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Which of the following is an example of homoleptic complex?

A

$$[Co(NH_3)_6]Cl_3$$

B

$$[Pt(NH_3)_2Cl_2]$$

C

$$[Co(NH_3)_4Cl_2]$$

D

$$[Co(NH_3)_5Cl]Cl_2$$

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 53

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Fluorination of an aromatic ring is easily accomplished by treating a diazonium salt with $$HBF_4$$. Which of the following conditions is correct about this reaction?

A

NaF/Cu

B

$$Cu_2O/H_2O$$

C

Only Heat

D

$$NaNO_2/Cu$$

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 54

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Which one of the following reagents is not suitable for the elimination reaction?

A

NaI

B

NaOEt/EtOH

C

$$NaOH/H_2O$$, $$\Delta$$

D

$$NaOH/H_2O$$ - EtOH

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 55

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Bromination of cyclohexene under conditions given below yields:

A

B

C

D

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 56

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The correct statement about the synthesis of erythritol $$(C(CH_2OH)_4)$$ used in the preparation of PETN is

A

The synthesis requires three aldol condensations and one Cannizzaro reaction.

B

Alpha hydrogen of ethanol and methanol are involved in this reaction.

C

The synthesis requires two aldol condensation and two Cannizzaro reactions.

D

The synthesis requires four aldol condensations between methanol and ethanol.

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 57

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The N which contributes least to the basicity of the compound is:

A

N-9

B

N-3

C

N-1

D

N-7

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 58

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Which of the following polymers is synthesized using a free radical polymerization technique?

A

Terylene

B

Melamine polymer

C

Nylon 6, 6

D

Teflon

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 59

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Which of the following is a bactericidal antibiotic?

A

Ofloxacin

B

Tetracycline

C

Chloramphenicol

D

Erythromycin

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NTA JEE Main 10th April 2016 Online - Chemistry - Question 60

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Observation of "Rhumann's purple" is a confirmatory test for the presence of:

A

Starch

B

Reducing sugar

C

Protein

D

Cupric ion

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