NTA JEE Main 29th January 2023 Shift 1 - Chemistry

NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 31

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The shortest wavelength of hydrogen atom in Lyman series is $$\lambda$$. The longest wavelength in Balmer series of He$$^+$$ is

A

$$\frac{5}{9}\lambda$$

B

$$\frac{9\lambda}{5}$$

C

$$\frac{36\lambda}{5}$$

D

$$\frac{5\lambda}{9}$$

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 32

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The bond dissociation energy is highest for

A

Cl$$_2$$

B

I$$_2$$

C

Br$$_2$$

D

F$$_2$$

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 33

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For 1 mol of gas, the plot of pV vs p is shown below. p is the pressure and V is the volume of the gas.

What is the value of compressibility factor at point A?

A

$$1 - \frac{a}{RTV}$$

B

$$1 + \frac{b}{V}$$

C

$$1 - \frac{b}{V}$$

D

$$1 + \frac{a}{RTV}$$

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 34

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Which of the given compounds can enhance the efficiency of hydrogen storage tank?

A

Li/P$$_4$$

B

SiH$$_4$$

C

NaNi$$_5$$

D

Di-isobutylaluminium hydride

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 35

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The magnetic behaviour of Li$$_2$$O, Na$$_2$$O$$_2$$ and KO$$_2$$, respectively, are

A

diamagnetic, paramagnetic and diamagnetic

B

paramagnetic, paramagnetic and diamagnetic

C

paramagnetic, diamagnetic and paramagnetic

D

diamagnetic, diamagnetic and paramagnetic

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 36

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The correct order of hydration enthalpies is
(A) K$$^+$$
(B) Rb$$^+$$
(C) Mg$$^{2+}$$
(D) Cs$$^+$$
(E) Ca$$^{2+}$$
Choose the correct answer from the options below:

A

C $$>$$ A $$>$$ E $$>$$ B $$>$$ D

B

E $$>$$ C $$>$$ A $$>$$ B $$>$$ D

C

C $$>$$ E $$>$$ A $$>$$ D $$>$$ B

D

C $$>$$ E $$>$$ A $$>$$ B $$>$$ D

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 37

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During the borax bead test with CuSO$$_4$$, a blue green colour of the bead was observed in oxidising flame due to the formation of

A

Cu$$_3$$B$$_2$$

B

Cu

C

Cu(BO$$_2$$)$$_2$$

D

CuO

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 38

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Compound that will give positive Lassaigne's test for both nitrogen and halogen is

A

N$$_2$$H$$_4$$ $$\cdot$$ HCl

B

CH$$_3$$NH$$_2$$. HCl

C

NH$$_4$$Cl

D

NH$$_2$$OH. HCl

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 39

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Correct statement about smog is

A

NO$$_2$$ is present in classical smog

B

Both NO$$_2$$ and SO$$_2$$ are present in classical smog

C

Photochemical smog has high concentration of oxidizing agents

D

Classical smog also has high concentration of oxidizing agents

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 40

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The standard electrode potential (M$$^{3+}$$/M$$^{2+}$$) for V, Cr, Mn & Co are $$-0.26$$ V, $$-0.41$$ V, $$+1.57$$ V and $$+1.97$$ V, respectively. The metal ions which can liberate H$$_2$$ from a dilute acid are

A

V$$^{2+}$$ and Mn$$^{2+}$$

B

Cr$$^{2+}$$ and Co$$^{2+}$$

C

V$$^{2+}$$ and Cr$$^{2+}$$

D

Mn$$^{2+}$$ and Co$$^{2+}$$

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 41

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Following figure shows dependence of molar conductance of two electrolytes on concentration. $$\Lambda^0_m$$ is the limiting molar conductivity.

The number of Incorrect statement(s) from the following is ______
(A) $$\Lambda^0_m$$ for electrolyte A is obtained by extrapolation
(B) For electrolyte B, $$\Lambda_m$$ Vs $$\sqrt{c}$$ graph is a straight line with intercept equal to $$\Lambda^0_m$$
(C) At infinite dilution, the value of degree of dissociation approach zero for electrolyte B.
(D) $$\Lambda_m$$ for any electrolyte A or B can be calculated using $$\lambda°$$ for individual ions.

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 42

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Which of the following salt solutions would coagulate the colloid solution formed when FeCl$$_3$$ is added to NaOH solution, at the fastest rate?

A

10 mL of 0.2 mol dm$$^{-3}$$ AlCl$$_3$$

B

10 mL of 0.1 mol dm$$^{-3}$$ Na$$_2$$SO$$_4$$

C

10 mL of 0.1 mol dm$$^{-3}$$ Ca$$_3$$(PO$$_4$$)$$_2$$

D

10 mL of 0.15 mol dm$$^{-3}$$ CaCl$$_2$$

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 43

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The reaction representing the Mond process for metal refining is ______

A

$$\text{Ni} + 4\text{CO} \xrightarrow{\Delta} \text{Ni(CO)}_4$$

B

$$2\text{K[Au(CN)}_2] + \text{Zn} \xrightarrow{\Delta} \text{K}_2[\text{Zn(CN)}_4] + 2\text{Au}$$

C

$$\text{Zr} + 2\text{I}_2 \xrightarrow{\Delta} \text{ZrI}_4$$

D

$$\text{ZnO} + \text{C} \xrightarrow{\Delta} \text{Zn} + \text{CO}$$

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 44

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"A" obtained by Ostwald's method involving air oxidation of NH$$_3$$, upon further air oxidation produces "B". "B" on hydration forms an oxoacid of Nitrogen along with evolution of "A". The oxoacid also produces "A" and gives positive brown ring test

A

NO$$_2$$, N$$_2$$O$$_5$$

B

NO$$_2$$, N$$_2$$O$$_4$$

C

NO, NO$$_2$$

D

N$$_2$$O$$_3$$, NO$$_2$$

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 45

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Chiral complex from the following is:
Here en = ethylene diamine

A

cis $$-$$ [PtCl$$_2$$(en)$$_2$$]$$^{2+}$$

B

trans $$-$$ [PtCl$$_2$$(en)$$_2$$]$$^{2+}$$

C

cis $$-$$ [PtCl$$_2$$(NH$$_3$$)$$_2$$]

D

trans $$-$$ [Co(NH$$_3$$)$$_4$$Cl$$_2$$]$$^+$$

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 46

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Identify the correct order for the given property for following compounds

Choose the correct answer from the option below:

A

(B), (C) and (D) only

B

(A), (C) and (E) only

C

(A), (C) and (D) only

D

(A), (B) and (E) only

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 47

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The increasing order of pK$$_a$$ for the following phenols is
(A) 2,4-Dinitrophenol
(B) 4-Nitrophenol
(C) 2,4,5-Trimethylphenol
(D) Phenol
(E) 3-Chlorophenol
Choose the correct answer from the option given below:

A

(A), (E), (B), (D), (C)

B

(A), (B), (E), (D), (C)

C

(C), (D), (E), (B), (A)

D

(C), (E), (D), (B), (A)

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 48

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Match List I with List II.

List I (Reaction)	List II (Reagents)
(A) Hoffmann Degradation	(I) Conc. KOH, $$\Delta$$
(B) Clemmensen reduction	(II) CHCl$$_3$$, NaOH/H$$_3$$O$$^+$$
(C) Cannizzaro reaction	(III) Br$$_2$$, NaOH
(D) Reimer-Tiemann reaction	(IV) Zn $$-$$ Hg/HCl

A

(A) - III, (B) - IV, (C) - II, (D) - I

B

(A) - II, (B) - IV, (C) - I, (D) - III

C

(A) - III, (B) - IV, (C) - I, (D) - II

D

(A) - II, (B) - I, (C) - III, (D) - IV

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 49

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The major product 'P' for the following sequence of reactions is:

A

B

C

D

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 50

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Match List I with List II

List I (Antimicrobials)	List II (Names)
(A) Narrow Spectrum Antibiotic	(I) Furacin
(B) Antiseptic	(II) Sulphur dioxide
(C) Disinfectants	(III) Penicillin-G
(D) Broad spectrum antibiotic	(IV) Chloramphenicol

A

(A) - III, (B) - I, (C) - II, (D) - IV

B

(A) - I, (B) - II, (C) - IV, (D) - III

C

(A) - II, (B) - I, (C) - IV, (D) - III

D

(A) - III, (B) - I, (C) - IV, (D) - II

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 51

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Number of cyclic tripeptides formed with 2 amino acids A and B is:

A

$$2$$

B

$$3$$

C

$$5$$

D

$$4$$

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 52

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The number of molecules or ions from the following, which do not have odd number of electrons are ______.
(A) NO$$_2$$
(B) ICl$$_4^-$$
(C) BrF$$_3$$
(D) ClO$$_2$$
(E) NO$$_2^+$$
(F) NO

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 53

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Consider the following reaction approaching equilibrium at $$27°$$C and 1 atm pressure
$$\text{A} + \text{B} \underset{K_r=10^2}{\overset{K_f=10^3}{\rightleftharpoons}} \text{C} + \text{D}$$
The standard Gibb's energy change $$(\Delta_r G°)$$ at $$27°$$C is $$(-)$$ ______ kJ mol$$^{-1}$$. (Nearest integer).
(Given: R $$= 8.3$$ J K$$^{-1}$$ mol$$^{-1}$$ and $$\ln 10 = 2.3$$)

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 54

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Water decomposes at 2300 K
$$\text{H}_2\text{O}(g) \to \text{H}_2(g) + \frac{1}{2}\text{O}_2(g)$$
The percent of water decomposing at 2300 K and 1 bar is ______ (Nearest integer). Equilibrium constant for the reaction is $$2 \times 10^{-3}$$ at 2300 K

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 55

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Millimoles of calcium hydroxide required to produce 100 mL of the aqueous solution of pH 12 is $$x \times 10^{-1}$$. The value of $$x$$ is ______ (Nearest integer). Assume complete dissociation.

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 56

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Following chromatogram was developed by adsorption of compound 'A' on a 6 cm TLC glass plate. Retardation factor of the compound 'A' is ______ $$\times 10^{-1}$$.

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 57

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17 mg of a hydrocarbon (M.F. C$$_{10}$$H$$_{16}$$) takes up 8.40 mL of the H$$_2$$ gas measured at 0°C and 760 mm of Hg. Ozonolysis of the same hydrocarbon yields

The number of double bond/s present in the hydrocarbon is

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 58

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Solid Lead nitrate is dissolved in 1 litre of water. The solution was found to boil at $$100.15°$$C. When $$0.2$$ mol of NaCl is added to the resulting solution, it was observed that the solution froze at $$-0.8°$$C. The solutibility product of PbCl$$_2$$ formed is ______ $$\times 10^{-6}$$ at 298 K. (Nearest integer)
Given: K$$_b = 0.5$$ K kg mol$$^{-1}$$ and K$$_f = 1.8$$ kg mol$$^{-1}$$. Assume molality to be equal to molarity in all cases.

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 59

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For certain chemical reaction X $$\to$$ Y, the rate of formation of product is plotted against the time as shown in the figure. The number of Correct statement/s from the following is ______

(A) Over all order of this reaction is one
(B) Order of this reaction can't be determined
(C) In region-I and III, the reaction is of first and zero order respectively
(D) In region-II, the reaction is of first order
(E) In region-II, the order of reaction is in the range of 0.1 to 0.9.

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NTA JEE Main 29th January 2023 Shift 1 - Chemistry - Question 60

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The sum of bridging carbonyls in W(CO)$$_6$$ and Mn$$_2$$(CO)$$_{10}$$ is ______.

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