NTA JEE Main 19th April 2014 Online - Chemistry

NTA JEE Main 19th April 2014 Online - Chemistry - Question 31

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The ionization energy of gaseous Na atoms is 495.5 kJ mol$$^{-1}$$. The lowest possible frequency of light that ionizes a sodium atom is (h = $$6.626 \times 10^{-34}$$ Js, N$$_A$$ = $$6.022 \times 10^{23}$$ mol$$^{-1}$$)

A

$$1.24 \times 10^{15}$$ s$$^{-1}$$

B

$$7.50 \times 10^4$$ s$$^{-1}$$

C

$$4.76 \times 10^{14}$$ s$$^{-1}$$

D

$$3.15 \times 10^{15}$$ s$$^{-1}$$

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 32

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Which one of the following has the largest ionic radius?

A

F$$^-$$

B

B$$^{3+}$$

C

O$$^{2-}$$

D

Li$$^+$$

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 33

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Which one of the following molecules is paramagnetic?

A

N$$_2$$

B

O$$_3$$

C

CO

D

NO

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 34

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Sulphur dioxide and oxygen were allowed to diffuse through a porous partition. 20 dm$$^3$$ of SO$$_2$$ diffuses through the porous partition in 60 seconds. The volume of O$$_2$$ in dm$$^3$$ which diffuses under the similar condition in 30 seconds will be (atomic mass of sulphur = 32 u):

A

28.2

B

10.0

C

14.1

D

7.09

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 35

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For the decomposition of the compound, represented as NH$$_2$$COONH$$_4$$(s) $$\rightleftharpoons$$ 2NH$$_3$$(g) + CO$$_2$$(g), the K$$_p$$ = $$2.9 \times 10^{-5}$$ atm$$^3$$. If the reaction is started with 1 mole of the compound, the total pressure at equilibrium would be:

A

$$7.66 \times 10^{-2}$$ atm

B

$$38.8 \times 10^{-2}$$ atm

C

$$5.82 \times 10^{-2}$$ atm

D

$$1.94 \times 10^{-2}$$ atm

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 36

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Zirconium phosphate [Zr$$_3$$(PO$$_4$$)$$_4$$] dissociates into three zirconium cations of charge +4 and four phosphate anions of charge $$-3$$. If molar solubility of zirconium phosphate is denoted by s and its solubility product by K$$_{sp}$$ then which of the following relationship between s and K$$_{sp}$$ is correct?

A

$$S = \{K_{sp}/6912\}^7$$

B

$$S = \{K_{sp}/144\}^{1/7}$$

C

$$S = \{K_{sp}/(6912)^{1/7}\}$$

D

$$S = (K_{sp}/6912)^{1/7}$$

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 37

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How many electrons are involved in the following redox reaction?
Cr$$_2$$O$$_7^{2-}$$ + Fe$$^{2+}$$ + C$$_2$$O$$_4^{2-}$$ → Cr$$^{3+}$$ + Fe$$^{3+}$$ + CO$$_2$$ (Unbalanced)

A

6

B

5

C

3

D

4

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 38

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Consider the reaction: H$$_2$$SO$$_{3(aq)}$$ + Sn$$^{4+}_{(aq)}$$ + H$$_2$$O$$_{(l)}$$ → Sn$$^{2+}_{(aq)}$$ + HSO$$^-_{4(aq)}$$ + 3H$$^+_{(aq)}$$. Which of the following statements is correct?

A

Sn$$^{4+}$$ is the oxidizing agent because it undergoes oxidation

B

Sn$$^{4+}$$ is the reducing agent because it undergoes oxidation

C

H$$_2$$SO$$_3$$ is the reducing agent because it undergoes reduction

D

H$$_2$$SO$$_3$$ is the reducing agent because it undergoes oxidation

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 39

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Amongst LiCl, RbCl, BeCl$$_2$$ and MgCl$$_2$$ the compounds with the greatest and the least ionic character, respectively are:

A

MgCl$$_2$$ and BeCl$$_2$$

B

RbCl and MgCl$$_2$$

C

LiCl and RbCl

D

RbCl and BeCl$$_2$$

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 40

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Example of a three-dimensional silicate is:

A

Ultramarines

B

Feldspars

C

Zeolites

D

All of these

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 41

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Which of these statements is not true?

A

LiAlH$$_4$$ is versatile reducing agent in organic synthesis.

B

NO$$^+$$ is isoelectronic with O$$_2$$

C

Boron is always covalent in its compounds

D

In aqueous solution, the Tl$$^+$$ ion is much more stable than Tl (III)

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 42

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The correct IUPAC name of the following compound is:

A

4-methyl-3-ethylhexane

B

3-ethyl-4-methylhexane

C

4-ethyl-3-methylhexane

D

3,4-ethylmethylhexane

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 43

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The total number of octahedral void(s) per atom present in a cubic close packed structure is:

A

1

B

2

C

3

D

4

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 44

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For an ideal solution of two components A & B, which of the following is true?

A

$$\Delta H_{mixing} > 0$$ (zero)

B

A $$-$$ B interaction is stronger than A $$-$$ A & B $$-$$ B interactions

C

A $$-$$ A, B $$-$$ B & A $$-$$ B interactions are identical

D

$$\Delta H_{mixing} < 0$$ (zero)

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 45

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The observed osmotic pressure for a 0.10 M solution of Fe(NH$$_4$$)$$_2$$(SO$$_4$$)$$_2$$ at 25 °C is 10.8 atm. The expected and experimental (observed) values of Van't Hoff factor 'i' will be respectively; (R = 0.082 L atm k$$^-$$ mol$$^{-1}$$)

A

4 and 4.00

B

3 and 5.42

C

5 and 4.42

D

5 and 3.42

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 46

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Choose the correct statement with respect to the vapour pressure of a liquid among the following:

A

Increases non-linearly with increasing temperature

B

Decreases non-linearly with increasing temperature

C

Decreases linearly with increasing temperature

D

Increases linearly with increasing temperature

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 47

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For the reaction, 3A + 2B → C + D, the differential rate law can be written as:

A

$$+\frac{1}{3}\frac{d[A]}{dt} = -\frac{d[C]}{dt} = k[A]^n[B]^m$$

B

$$\frac{1}{3}\frac{d[A]}{dt} = \frac{d[C]}{dt} = k[A]^n[B]^m$$

C

$$-\frac{1}{3}\frac{d[A]}{dt} = \frac{d[C]}{dt} = k[A]^n[B]^m$$

D

$$-\frac{d[A]}{dt} = \frac{d[C]}{dt} = k[A]^n[B]^m$$

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 48

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Which one of the following ores is known as Malachite:

A

Cu$$_2$$S

B

Cu$$_2$$O

C

Cu(OH)$$_2$$ · CuCO$$_3$$

D

CuFeS$$_2$$

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 49

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An octahedral complex with molecular composition M.5NH$$_3$$.Cl.SO$$_4$$ has two isomers, A and B. The solution of A gives a white precipitate with AgNO$$_3$$ solution and the solution of B gives white precipitate with BaCl$$_2$$ solution. The type of isomerism exhibited by the complex is:

A

Coordinate isomerism

B

Geometrical isomerism

C

Ionisation isomerism

D

Linkage isomerism

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 50

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Nickel (Z = 28) combines with a uninegative monodentate ligand to form a diamagnetic complex [NiL$$_4$$]$$^{2-}$$. The hybridisation involved and the number of unpaired electrons present in the complex are respectively:

A

dsp$$^2$$, zero

B

sp$$^3$$, zero

C

dsp$$^2$$, one

D

sp$$^3$$, two

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 51

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Amongst the following, identify the species with an atom in +6 oxidation state.

A

CrO$$_2$$Cl$$_2$$

B

[Cr(CN)$$_6$$]$$^{3-}$$

C

Cr$$_2$$O$$_3$$

D

[MnO$$_4$$]$$^-$$

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 52

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The major product formed when 1, 1, 1-trichloropropane is treated with aqueous potassium hydroxide is:

A

2-Propanol

B

Propyne

C

Propionic acid

D

1-Propanol

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 53

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Which of the following compounds will not be soluble in sodium bicarbonate?

A

2, 4, 6-Trinitrophenol

B

Benzene sulphonic acid

C

o-Nitrophenol

D

Benzoic acid

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 54

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Which one of the following substituents at para-position is most effective in stabilizing the phenoxide ion?

A

-CH$$_3$$

B

-OCH$$_3$$

C

-COCH$$_3$$

D

-CH$$_2$$OH

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 55

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Williamson synthesis of ether is an example of:

A

Nucleophilic substitution

B

Electrophilic addition

C

Nucleophilic addition

D

Electrophilic substitution

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 56

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The final product formed when methylamine is treated with NaNO$$_2$$ and HCl followed by hydrolysis is:

A

Nitromethane

B

Methylcyanide

C

Methyl alcohol

D

Diazomethane

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 57

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In a set of reactions p-nitrotoluene yielded a product E.

The product E would be:

A

B

C

D

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 58

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Which one of the following is an example of thermosetting polymer?

A

Nylon-6,6

B

Bakelite

C

Buna-N

D

Teflon

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 59

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Among the following organic acids, the acid present in rancid butter is:

A

Pyruvic acid

B

Acetic acid

C

Butyric acid

D

Lactic acid

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NTA JEE Main 19th April 2014 Online - Chemistry - Question 60

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The reason for double helical structure of DNA is the operation of:

A

Van der Waals forces

B

Electrostatic attractions

C

Hydrogen bonding

D

Dipole-Dipole interactions

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