NTA JEE Main 15th April 2018 Shift 2 - Chemistry

NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 31

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For per gram of reactant, the maximum quantity of N$$_2$$ gas is produced in which of the following thermal decomposition reactions? (Given: Atomic wt. : Cr = 52u, Ba = 137u)

A

Ba(N$$_3$$)$$_2$$(s) $$\rightarrow$$ Ba(C) + 3N$$_2$$(g)

B

(NH$$_4$$)$$_2$$Cr$$_2$$O$$_7$$(s) $$\rightarrow$$ N$$_2$$(g) + 4H$$_2$$O(g) + Cr$$_2$$O$$_3$$(s)

C

2NH$$_3$$(g) $$\rightarrow$$ N$$_2$$(g) + 3H$$_2$$(g)

D

2NH$$_4$$NO$$_3$$(s) $$\rightarrow$$ 2N$$_2$$(g) + 4H$$_2$$O(g) + O$$_2$$(g)

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 32

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The de-Broglie's wavelength of electron present in first Bohr orbit of 'H' atom is:

A

$$4 \times 0.529$$ Å

B

$$2\pi \times 0.529$$ Å

C

$$\frac{0.529}{2\pi}$$ Å

D

$$0.529$$ Å

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 33

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The correct order of electron affinity is:

A

O > F > Cl

B

F > O > Cl

C

F > Cl > O

D

Cl > F > O

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 34

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Which of the following best describes the diagram of molecular orbital?

A

A bonding $$\pi$$ orbital

B

A non-bonding orbital

C

An antibonding $$\sigma$$ orbital

D

An antibonding $$\pi$$ orbital

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 35

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$$\Delta_r G^\circ$$ at 500 K for substance 'S' in liquid state and gaseous state are +100.7 kcal mol$$^{-1}$$ and +103 kcal mol$$^{-1}$$, respectively. Vapour pressure of liquid 'S' at 500 K is approximately equal to: (R = 2 cal K$$^{-1}$$ mol$$^{-1}$$)

A

100 atm

B

1 atm

C

10 atm

D

0.1 atm

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 36

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Given (i) 2Fe$$_2$$O$$_3$$(s) $$\rightarrow$$ 4Fe(s) + 3O$$_2$$(g); $$\Delta_r G^\circ$$ = +1487.0 kJ mol$$^{-1}$$
(ii) 2CO(g) + O$$_2$$(g) $$\rightarrow$$ 2CO$$_2$$(g); $$\Delta_r G^\circ$$ = -514.4 kJ mol$$^{-1}$$
Free energy change, $$\Delta_r G^\circ$$ for the reaction 2Fe$$_2$$O$$_3$$(s) + 6CO(g) $$\rightarrow$$ 4Fe(s) + 6CO$$_2$$(g) will be:

A

-112.4 kJ mol$$^{-1}$$

B

-56.2 kJ mol$$^{-1}$$

C

-208.0 kJ mol$$^{-1}$$

D

-168.2 kJ mol$$^{-1}$$

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 37

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At a certain temperature in a 5L vessel, 2 moles of carbon monoxide and 3 moles of chlorine were allowed to reach equilibrium according to the reaction, CO + Cl$$_2$$ $$\rightleftharpoons$$ COCl$$_2$$. At equilibrium, if one mole of CO is present then equilibrium constant (K$$_c$$) for the reaction is:

A

2.5

B

4

C

2

D

3

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 38

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Following four solutions are prepared by mixing different volumes of NaOH and HCl of different concentrations, pH of which one of them will be equal to 1?

A

55 mL $$\frac{M}{10}$$ HCl + 45 mL $$\frac{M}{10}$$ NaOH

B

75 mL $$\frac{M}{5}$$ HCl + 25 mL $$\frac{M}{5}$$ NaOH

C

100 mL $$\frac{M}{10}$$ HCl + 100 mL $$\frac{M}{10}$$ NaOH

D

60 mL $$\frac{M}{10}$$ HCl + 40 mL $$\frac{M}{10}$$ NaOH

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 39

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In KO$$_2$$, the nature of oxygen species and the oxidation state of oxygen atom are, respectively:

A

Superoxide and -1

B

Superoxide and -1/2

C

Peroxide and -1/2

D

Oxide and -2

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 40

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Lithium aluminium hydride reacts with silicon tetrachloride to form:

A

LiCl, AlH$$_3$$ and SiH$$_4$$

B

LiCl, AlCl$$_3$$ and SiH$$_4$$

C

LiH, AlCl$$_3$$ and SiCl$$_2$$

D

LiH, AlH$$_3$$ and SiH$$_4$$

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 41

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The total number of optically active compounds formed in the following reaction is:

A

Zero

B

Six

C

Four

D

Two

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 42

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On the treatment of the following compound with a strong acid, the most susceptible site for bond cleavage is:

A

O2 - C3

B

O5 - C6

C

C4 - O5

D

C1 - O2

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 43

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Two compounds I and II are eluted by column chromatography (adsorption of I > II). Which one of the following is a correct statement?

A

II moves slower and has higher R$$_f$$ value than I

B

II moves faster and has higher R$$_f$$ value than I

C

I moves faster and has higher R$$_f$$ value than II

D

I moves slower and has higher R$$_f$$ value than I

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 44

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When 2-butyne is treated with H$$_2$$/Lindlar's catalyst, compound X is produced as the major product and when treated with Na/liq. NH$$_3$$ it produces Y as the major product. Which of the following statements is correct?

A

Y will have higher dipole moment and higher boiling point than X Y

B

Y will have higher dipole moment and lower boiling point than X

C

X will have lower dipole moment and lower boiling point than Y

D

X will have higher dipole moment and higher boiling point than Y

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 45

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The major product formed in the following reaction is:

A

B

C

D

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 46

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Biochemical oxygen demand (BOD) value can be a measure of water pollution caused by the organic matter. Which of the following statements is correct?

A

Polluted water has BOD value higher than 10 ppm

B

Aerobic bacteria decreases the BOD value

C

Anaerobic bacteria increases the BOD value

D

Clean water has BOD value higher than 10 ppm

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 47

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All of the following share the same crystal structure except:

A

RbCl

B

NaCl

C

CsCl

D

LiCl

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 48

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Two 5 molal solutions are prepared by dissolving a non-electrolyte, non-volatile solute separately in the solvents X and Y. The molecular weights of the solvents are M$$_X$$ and M$$_Y$$, respectively where M$$_X$$ = $$\frac{3}{4}$$ M$$_Y$$. The relative lowering of vapour pressure of the solution in X is "m" times that of the solution in Y. Given that the number of moles of solute is very small in comparison to that of solvent, the value of "m" is:

A

$$\frac{3}{4}$$

B

$$\frac{1}{2}$$

C

$$\frac{1}{4}$$

D

$$\frac{4}{3}$$

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 49

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For a first order reaction, A $$\rightarrow$$ P, t$$_{1/2}$$ (half-life) is 10 days. The time required for $$\frac{1}{4}$$th conversion of A (in days) is: (ln 2 = 0.693, ln 3 = 1.1)

A

3.2

B

2.5

C

4.1

D

5

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 50

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If x gram of gas is adsorbed by m gram of adsorbent at pressure P the plot of log $$\frac{x}{m}$$ versus log P is linear. The slope of the plot is: (m and k are constants and n > 1)

A

log k

B

$$\frac{1}{n}$$

C

2k

D

n

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 51

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In the leaching method, bauxite ore is digested with a concentrated solution of NaOH that produces 'X'. When CO$$_2$$ gas is passed through the aqueous solution of 'X', a hydrated compound 'Y' is precipitated. 'X' and 'Y' respectively are:

A

Na[Al(OH)$$_4$$] and Al$$_2$$(CO$$_3$$)$$_3$$ $$\cdot$$ xH$$_2$$O

B

Al(OH)$$_3$$ and Al$$_2$$O$$_3$$ $$\cdot$$ xH$$_2$$O

C

NaAlO$$_2$$ and Al$$_2$$(CO$$_3$$)$$_3$$ $$\cdot$$ xH$$_2$$O

D

Na[Al(OH)$$_4$$] and Al$$_2$$O$$_3$$ $$\cdot$$ xH$$_2$$O

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 52

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In XeO$$_3$$ F$$_2$$, the number of bond pair(s), $$\pi$$-bond(s) and lone pair(s) on Xe atom respectively are:

A

5, 3, 0

B

5, 2, 0

C

4, 2, 2

D

4, 4, 0

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 53

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The number of P - O bonds in P$$_4$$O$$_6$$ is:

A

9

B

6

C

12

D

18

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 54

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The correct order of spin-only magnetic moments among the following is: (Atomic number: Mn = 25, Co = 27, Ni = 28, Zn = 30)

A

[ZnCl$$_4$$]$$^{2-}$$ > [NiCl$$_4$$]$$^{2-}$$ > [CoCl$$_4$$]$$^{2-}$$ > [MnCl$$_4$$]$$^{2-}$$

B

[CoCl$$_4$$]$$^{2-}$$ > [MnCl$$_4$$]$$^{2-}$$ > [NiCl$$_4$$]$$^{2-}$$ > [ZnCl$$_4$$]$$^{2-}$$

C

[NiCl$$_4$$]$$^{2-}$$ > [CoCl$$_4$$]$$^{2-}$$ > [MnCl$$_4$$]$$^{2-}$$ > [ZnCl$$_4$$]$$^{2-}$$

D

[MnCl$$_4$$]$$^{2-}$$ > [CoCl$$_4$$]$$^{2-}$$ > [NiCl$$_4$$]$$^{2-}$$ > [ZnCl$$_4$$]$$^{2-}$$

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 55

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The total number of possible isomers for square planar [Pt(Cl)(NO$$_2$$)(NO$$_3$$)(SCN)]$$^{2-}$$ is:

A

16

B

12

C

8

D

24

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 56

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The major product formed in the following reaction is:

A

B

C

D

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 57

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The increasing order of the acidity of the following carboxylic acids is:

A

III < II < IV < I

B

I < III < II < IV

C

IV < II < III < I

D

II < IV < III < I

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 58

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The increasing order of diazotisation of the following compounds is:

(a)

A

(D) < (C) < (B) < (A)

B

(A) < (D) < (B) < (C)

C

(A) < (B) < (C) < (D)

D

(A) < (D) < (C) < (B)

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 59

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Which of the following statements is not true?

A

Chain growth polymerisation involves homopolymerisation only

B

Chain growth polymerisation includes both homo-polymerisation and copolymerisation

C

Nylon 6 is an example of step-growth polymerisation

D

Step growth polymerisation requires a bifunctional monomer

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NTA JEE Main 15th April 2018 Shift 2 - Chemistry - Question 60

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The dipeptide, Gln-Gly, on treatment with CH$$_3$$COCl followed by aqueous work up gives:

A

B

C

D

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