NTA JEE Main 4th April 2015 Offline - Chemistry

NTA JEE Main 4th April 2015 Offline - Chemistry - Question 31

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The molecular formula of a commercial resin used for exchanging ions in water softening is $$C_8H_7SO_3Na$$ (molecular weight = 206). What would be the maximum uptake of $$Ca^{2+}$$ ions by the resin if expressed in mol per gm?

A

$$\frac{1}{412}$$

B

$$\frac{1}{103}$$

C

$$\frac{1}{206}$$

D

$$\frac{2}{309}$$

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 32

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Which of the following is the energy of a possible excited state of hydrogen?

A

+6.8 eV

B

+13.6 eV

C

-6.8 eV

D

-3.4 eV

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 33

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The ionic radii (in $$\mathring{A}$$) of $$N^{3-}$$, $$O^{2-}$$ and $$F^{-}$$ are respectively:

A

1.71, 1.36 and 1.40

B

1.36, 1.40 and 1.71

C

1.36, 1.71 and 1.40

D

1.71, 1.40 and 1.36

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 34

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The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is:

A

Hydrogen bond

B

Ion-ion interaction

C

Ion-dipole interaction

D

London force

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 35

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The following reaction is performed at 298 K.
$$2NO(g) + O_2(g) \rightleftharpoons 2NO_2(g)$$
The standard free energy of the formation of $$NO(g)$$ is 86.6 kJ mol$$^{-1}$$ at 298 K. What is the standard free energy of the formation of $$NO_2(g)$$ at 298 K? $$(K_P = 1.6 \times 10^{12})$$

A

$$0.5[2 \times 86,600 - R(298)\ln(1.6 \times 10^{12})]$$

B

$$R(298)\ln(1.6 \times 10^{12}) - 86,600$$

C

$$86,600 + R(298)\ln(1.6 \times 10^{12})$$

D

$$86,600 - \frac{\ln(1.6 \times 10^{12})}{R(298)}$$

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 36

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The standard Gibbs energy change at 300 K for the reaction $$2A \rightleftharpoons B + C$$ is 2494.2 J. At a given time, the composition of the reaction mixture is $$[A] = \frac{1}{2}$$, $$[B] = 2$$ and $$[C] = \frac{1}{2}$$. The reaction proceeds in the:
[R = 8.314 J/K-mol, e = 2.718] {Given antilog (-0.44) = 0.36}

A

Reverse direction because $$Q < K_C$$

B

Forward direction because $$Q > K_C$$

C

Reverse direction because $$Q > K_C$$

D

Forward direction because $$Q < K_C$$

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 37

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From the following statements, choose the incorrect statement regarding $$H_2O_2$$.

A

It has to be kept away from dust.

B

It can act only as an oxidising agent.

C

It decomposes on exposure to light.

D

It has to be stored in plastic or wax-lined glass bottles in the dark.

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 38

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Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?

A

$$SrSO_4$$

B

$$CaSO_4$$

C

$$BeSO_4$$

D

$$BaSO_4$$

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 39

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In Carius method of estimation of halogens, 250 mg of an organic compound gave 141 mg AgBr. What is the percentage of bromine in the compound (atomic mass of Ag = 108 and atomic number of Br = 80)?

A

60

B

24

C

36

D

48

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 40

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Which of the following compounds will exhibit geometrical isomerism?

A

1, 1 - Diphenyl - 1 - propane

B

1 - Phenyl - 2 - butene

C

3 - Phenyl - 1 - butene

D

2 - Phenyl - 1 - butene

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 41

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Assertion: Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen.
Reason: The reaction between nitrogen and oxygen requires high temperature.

A

Both the Assertion and Reason are incorrect.

B

Both Assertion and Reason are correct and the Reason is the correct explanation for the Assertion.

C

Both Assertion and Reason are correct, but the Reason is not the correct explanation for the Assertion.

D

The Assertion is incorrect but the Reason is correct.

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 42

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Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of 4.29 $$\mathring{A}$$. The radius of sodium atom is approximately:

A

0.93 $$\mathring{A}$$

B

1.86 $$\mathring{A}$$

C

3.22 $$\mathring{A}$$

D

5.72 $$\mathring{A}$$

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 43

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The vapour pressure of acetone at 20$$^\circ$$C is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at 20$$^\circ$$C, its vapour pressure was 183 torr. The molar mass (g mol$$^{-1}$$) of the substance is:

A

488

B

32

C

64

D

128

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 44

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Two Faraday of electricity is passed through a solution of $$CuSO_4$$. The mass of copper deposited at the cathode is: (Atomic mass of Cu = 63.5 amu)

A

127 g

B

0 g

C

63.5 g

D

2 g

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 45

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Higher order (>3) reactions are rare due to:

A

Loss of active species on collision.

B

Low probability of simultaneous collision of all the reacting species.

C

Increase in entropy and activation energy as more molecules are involved.

D

Shifting of equilibrium towards reactants due to elastic collisions.

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 46

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3 g of activated charcoal was added to 50 mL of acetic acid solution (0.06 N) in a flask. After an hour, it was filtered and the strength of the filtrate was found to be 0.042 N. The amount of acetic acid adsorbed (per gram of charcoal) is:

A

54 mg

B

18 mg

C

36 mg

D

42 mg

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 47

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In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false?

A

$$Na_3AlF_6$$ serves as the electrolyte.

B

CO and $$CO_2$$ are produced in this process.

C

$$Al_2O_3$$ is mixed with $$CaF_2$$ which lowers the melting point of the mixture and brings conductivity.

D

$$Al^{3+}$$ is reduced at the cathode to form Al.

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 48

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Which among the following is the most reactive?

A

ICl

B

$$Cl_2$$

C

$$Br_2$$

D

$$I_2$$

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 49

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Which one has the highest boiling point?

A

Xe

B

He

C

Ne

D

Kr

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 50

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Match the catalysts to the correct process.

Catalyst     Process
A. $$TiCl_3$$     i. Wacker process
B. $$PdCl_2$$     ii. Ziegler-Natta polymerisation
C. $$CuCl_2$$     iii. Contact process
D. $$V_2O_5$$     iv. Deacon's process

A

A $$\rightarrow$$ iii, B $$\rightarrow$$ i, C $$\rightarrow$$ ii, D $$\rightarrow$$ iv

B

A $$\rightarrow$$ iii, B $$\rightarrow$$ ii, C $$\rightarrow$$ iv, D $$\rightarrow$$ i

C

A $$\rightarrow$$ ii, B $$\rightarrow$$ i, C $$\rightarrow$$ iv, D $$\rightarrow$$ iii

D

A $$\rightarrow$$ ii, B $$\rightarrow$$ iii, C $$\rightarrow$$ iv, D $$\rightarrow$$ i

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 51

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Which one of the following compounds is not a yellow colored compound?

A

$$BaCrO_4$$

B

$$Zn_2[Fe(CN)_6]$$

C

$$K_3[Co(NO_2)_6]$$

D

$$(NH_4)_3[As(Mo_3O_{10})_4]$$

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 52

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The colour of $$KMnO_4$$ is due to: [where M $$\rightarrow$$ metal, L $$\rightarrow$$ ligand]

A

$$\sigma - \sigma^*$$ transition

B

M $$\rightarrow$$ L charge transfer transition

C

d - d transition

D

L $$\rightarrow$$ M charge transfer transition

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 53

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The number of geometric isomers that can exist for square planar $$[Pt(Cl)(py)(NH_3)(NH_2OH)]^+$$ is (py = pyridine):

A

6

B

2

C

3

D

4

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 54

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The synthesis of alkyl fluorides is best accomplished by:

A

Swarts reaction

B

Free radical fluorination

C

Sandmeyer's reaction

D

Finkelstein reaction

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 55

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Which compound would give 5-keto-2-methyl hexanal upon ozonolysis?

A

B

C

D

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 56

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In the following sequence of reactions:
Toluene $$\xrightarrow{KMnO_4}$$ A $$\xrightarrow{SOCl_2}$$ B $$\xrightarrow[ BaSO_4]{H_2/Pd}$$ C
The Product C is:

A

$$C_6H_5CHO$$

B

$$C_6H_5COOH$$

C

$$C_6H_5CH_3$$

D

$$C_6H_5CH_2OH$$

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 57

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In the reaction,

The product E is

A

B

C

D

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 58

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Which polymer is used in the manufacture of paints and lacquers?

A

Poly vinyl chloride

B

Bakelite

C

Glyptal

D

Polypropene

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 59

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Which of the following compounds is not an antacid?

A

Ranitidine

B

Aluminium hydroxide

C

Cimetidine

D

Phenelzine

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NTA JEE Main 4th April 2015 Offline - Chemistry - Question 60

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Which of the vitamins given below is water soluble?

A

Vitamin K

B

Vitamin C

C

Vitamin D

D

Vitamin E

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