NTA JEE Main 9th January 2019 Shift 2 - Chemistry

NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 31

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For the following reaction, the mass of water produced from 445 g of $$C_{57}H_{110}O_6$$ is:
$$2 \; C_{57}H_{110}O_6(s) + 163O_2(g) \rightarrow 114 \; CO_2(g) + 110H_2O(l)$$

A

490 g

B

890 g

C

445 g

D

495 g

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 32

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Which of the following combination of statements is true regarding the interpretation of the atomic orbitals?
(A) An electron in an orbital of high angular momentum stays away from the nucleus than an electron in the orbital of lower angular momentum.
(B) For a given value of the principal quantum number, the size of the orbit is inversely proportional to the azimuthal quantum number.
(C) According to wave mechanics, the ground state angular momentum is equal to $$\frac{h}{2\pi}$$.
(D) The plot of $$\psi$$ Vs $$r$$ for various azimuthal quantum numbers, shows peak shifting towards higher $$r$$ value.

A

(B), (C)

B

(A), (B)

C

(A), (C)

D

(A), (D)

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 33

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When the first electron gain enthalpy $$(\Delta H_{eg})$$ of oxygen is $$-141$$ kJ/mol, its second electron gain enthalpy is:

A

A positive value

B

Almost the same as that of the first

C

Negative, but less negative than the first

D

A more negative value than the first

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 34

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In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?

A

$$O_2 \rightarrow O_2^+$$

B

$$NO \rightarrow NO^+$$

C

$$O_2 \rightarrow O_2^-$$

D

$$N_2 \rightarrow N_2^+$$

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 35

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The entropy change associated with the conversion of 1 kg of ice at 273 K to water vapours at 383 K is: (Specific heat of water liquid and water vapour are 4.2 kJ K$$^{-1}$$ and 2.0 kJ K$$^{-1}$$ kg$$^{-1}$$; heat of liquid fusion and vaporization of water are 334 kJ kg$$^{-1}$$ and 2491 kJ kg$$^{-1}$$, respectively). (log 273 = 2.436, log 373 = 2.572, log 383 = 2.583)

A

9.26 kJ kg$$^{-1}$$K$$^{-1}$$

B

2.64 kJ kg$$^{-1}$$K$$^{-1}$$

C

8.49 kJ kg$$^{-1}$$K$$^{-1}$$

D

7.90 kJ kg$$^{-1}$$K$$^{-1}$$

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 36

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The temporary hardness of water is due to:

A

$$Na_2SO_4$$

B

$$NaCl$$

C

$$CaCl_2$$

D

$$Ca(HCO_3)_2$$

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 37

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The metal that forms nitride by reacting directly with $$N_2$$ of air is:

A

$$Li$$

B

$$Rb$$

C

$$Cs$$

D

$$K$$

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 38

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Which of the following compounds is not aromatic?

A

B

C

D

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 39

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The pH of rain water is approximately:

A

5.6

B

6.5

C

7.5

D

7.0

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 40

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Which of the following conditions in drinking water causes methemoglobinemia?

A

> 50 ppm of nitrate

B

> 50 ppm of chloride

C

> 100 ppm of sulphate

D

> 50 ppm of lead

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 41

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At 100$$^{\circ}$$C, copper (Cu) has FCC unit cell structure with cell edge length of $$x$$ $$\text{Å}$$. What is the approximate density of Cu (in g cm$$^{-3}$$) at this temperature? [Atomic Mass of Cu = 63.55 u]

A

$$\frac{105}{x^3}$$

B

$$\frac{205}{x^3}$$

C

$$\frac{422}{x^3}$$

D

$$\frac{211}{x^3}$$

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 42

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A solution containing 62 g ethylene glycol in 250 g water is cooled to $$-10^{\circ}$$C. If $$K_f$$ for water is 1.86 K kg mol$$^{-1}$$, the amount of water (in g) separated as ice is:

A

48

B

64

C

16

D

32

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 43

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If the standard electrode potential for a cell is 2 V at 300 K, the equilibrium constant (K) for the reaction.
$$Zn(s) + Cu^{2+}(aq) \rightleftharpoons Zn^{2+}(aq) + Cu(s)$$
at 300 K is approximately: ($$R = 8$$ J K$$^{-1}$$ mol$$^{-1}$$, $$F = 96000$$ C mol$$^{-1}$$)

A

$$e^{-160}$$

B

$$e^{-80}$$

C

$$e^{160}$$

D

$$e^{320}$$

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 44

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For the reaction, $$2A + B \rightarrow$$ products, when the concentration of $$A$$ and $$B$$ both were doubled, the rate of the reaction increased from 0.3 mol L$$^{-1}$$ s$$^{-1}$$ to 2.4 mol L$$^{-1}$$ s$$^{-1}$$. When the concentration of $$A$$ alone is doubled, the rate increased from 0.3 mol L$$^{-1}$$ s$$^{-1}$$ to 0.6 mol L$$^{-1}$$ s$$^{-1}$$. Which one of the following statements is correct?

A

Order of the reaction with respect to B is 2

B

Total order of the reaction is 4

C

Order of the reaction with respect to A is 2

D

Order of the reaction with respect to B is 1

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 45

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Consider the following reversible chemical reactions:
$$A_2(g) + B_2(g) \stackrel{k_1}{\rightleftharpoons} 2AB(g) \ldots (1)$$ 
$$6AB(g) \stackrel{k_2}{\rightleftharpoons} 3A_2(g) + 3B_2(g) \ldots (2)$$ 
The relation between $$K_1$$ and $$K_2$$ is:

A

$$K_2 = K_1^{-3}$$

B

$$K_1 K_2 = \frac{1}{3}$$

C

$$K_2 = K_1^3$$

D

$$K_1 K_2 = 3$$

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 46

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For coagulation of arsenious sulphide sol, which of the following salt solutions will be most effective?

A

$$Na_3PO_4$$

B

$$NaCl$$

C

$$AlCl_3$$

D

$$BaCl_2$$

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 47

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The correct match between Item I and Item II is:
Item I                        Item II
(A) Benzaldehyde      (P) Mobile phase
(B) Alumina               (Q) Adsorbent
(C) Acetonitrile         (R) Adsorbate

A

(A) $$\rightarrow$$ (P); (B) $$\rightarrow$$ (R); (C) $$\rightarrow$$ (Q)

B

(A) $$\rightarrow$$ (R); (B) $$\rightarrow$$ (Q); (C) $$\rightarrow$$ (P)

C

(A) $$\rightarrow$$ (Q); (B) $$\rightarrow$$ (P); (C) $$\rightarrow$$ (R)

D

(A) $$\rightarrow$$ (Q); (B) $$\rightarrow$$ (R); (C) $$\rightarrow$$ (P)

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 48

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The correct statement regarding the given Ellingham diagram is:

A

At 1400$$^{\circ}$$C, Al can be used for the extraction of Zn from ZnO

B

At 500$$^{\circ}$$C, coke can be used for the extraction of Zn from ZnO

C

At 800$$^{\circ}$$C, Cu can be used for the extraction of Zn from ZnO

D

Coke cannot be used for the extraction of Cu from Cu$$_2$$O

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 49

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Good reducing nature of $$H_3PO_2$$ is attributed to the presence of:

A

One P $$-$$ H bond

B

Two P $$-$$ OH bonds

C

Two P $$-$$ H bonds

D

One P $$-$$ OH bond

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 50

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The transition element that has the lowest enthalpy of atomisation is:

A

V

B

Fe

C

Zn

D

Cu

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 51

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Homoleptic octahedral complexes of a metal ion $$M^{3+}$$ with three monodentate ligands $$L_1$$, $$L_2$$ and $$L_3$$ absorb wavelengths in the region of green, blue and red respectively. The increasing order of the ligand strength is:

A

$$L_3 > L_1 > L_2$$

B

$$L_1 > L_2 > L_3$$

C

$$L_2 > L_1 > L_3$$

D

$$L_3 > L_2 > L_1$$

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 52

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The complex that has highest crystal field splitting energy $$(\Delta)$$, is:

A

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

B

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

C

$$[Co(NH_3)_5(H_2O)]Cl_3$$

D

$$K_2[CoCl_4]$$

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 53

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The major product of the following reaction is:

A

B

C

D

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 54

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The products formed in the reaction of cumene with $$O_2$$ followed by treatment with dil HCl are:

A

B

C

D

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 55

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The major product formed in the following reaction is:

A

B

C

D

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 56

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The test performed on compound x and their inferences are:
Test                                             Inference
(a) 2,4-DNP test                    Coloured precipitate yellow
(b) Iodoform test                  Yellow precipitate
(c) Azo-dye test                    No dye formation
Compound 'x' is:

A

B

C

D

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 57

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The major product obtained in the following reaction is:

A

B

C

D

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 58

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The increasing basicity order of the following compounds is:

A

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

B

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

C

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

D

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

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 59

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The major product of the following reaction is:

A

B

C

D

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NTA JEE Main 9th January 2019 Shift 2 - Chemistry - Question 60

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The correct sequence of amino acids present in the tripeptide given below is:

A

Val - Ser - Thr

B

Leu - Ser - Thr

C

Thr - Ser - Val

D

Thr - Ser - Leu

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