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	QPID #4593 (SET 3)		NEET chemistry for C-section Subjective
Class/Batch: C-Section	Duration: 1 hour	Date: 23 Nov,2022	Total Mark:180
Your Name:	Class:	Batch:	Course:

About Examination: NEET 2 chapter test

CHEMISTRY: Redox Reactions, Electrochemistry,

Section 1 (CHEMISTRY) 50X4=200

#161768

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Question :

Quantitatively O₃ is estimated by using :

standard $KMn{O_4} + $ standard Hypo
standard${K_2}C{r_2}{O_7} + $standard kI
Excess KI+ standard Hypo
Excess pbs+standard ${H_2}S{O_4}$

#2578262

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Question :

‘Oxidation number of H in NaH, CaH₂ and LiH, respectively is

+1, +1, –1
–1, +1, + 1
+1, + 1, + 1
–1,–1, –1

#2578277

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Question :

Which of the following transition metal has zero oxidation state ?

[Fe(CO)₅]
NH₂.NH₂
NOClO₄
CrO₅

#2578325

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Question :

The following species will not exhibit disproportionation reaction

ClO^–
ClO $\bar{2}$
ClO $\bar{3}$
ClO $\bar{4}$

#2578332

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Question :

How will you balance the total ionic charge of reactant and products if reaction is carried out in acidic solution?

By using H⁺ ions
By using OH^– ions
Adding H₂O molecules to the reactant or product
Multiplying by suitable coefficients

#2578348

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Question :

The values of x and y in the following redox reaction
x Cl₂ + 6OH^- $\to$ ClO $\bar{3}$ + yCl^- + 3H₂ O are

x = 5, y = 3
x = 2, y = 4
x = 3, y = 5
x = 4, y = 2

#2578368

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Question :

E^$\emptyset$ Values of some redox couples are given below. On the basis of these values choose the correct option.

E values : Br₂/Br ^– = + 1.90; Ag⁺ /Ag(s) = + 0.80 Cu²⁺ /Cu(s) = + 0.34; I₂(s) /I– = 0.54

Cu will reduce Br ^–
Cu will reduce Ag
Cu will reduce I ^–
Cu will reduce Br₂

#2578416

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Question :

Among NH₃, HNO₃, NaN₃ and Mg₃N2 the number of molecules having nitrogen in negative oxidation state is

#2578426

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Question :

When Cl₂ gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from

zero to +1 and zero to –5
zero to –1 and zero to +5
zero to –1 and zero to +3
zero to +1 and zero to –3

10)

#2578440

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Question :

What products are expected from the disproportionation reaction of hypochlorous acid?

HCl and Cl₂O
HCl and HClO₃
HClO₃ and Cl₂O
HClO₂ and HClO₄

11)

#2578460

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Question :

If equal volume of reactants are used, than no. moles of KMnO₄ (moles per liter) used in acidic medium required to completely oxidises the 0.5 M FeSO₃?

12)

#2578471

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Question :

If rod of a metal (x) is put in a metal ion solution which is blue in colour , solution turn colorless. The metal rod and solution respectively are?

Zinc and Cu(II)
Zinc and Ni(II)
Aluminium and Cu(II)
Both (a) and (c)

13)

#2652452

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Question :

Standard reduction potential values are given ${E^{0}}_{c u^{+ 2} / c u} = 0.34 V a n d {E^{0}}_{c u^{+} / c u} = 0.52 V, {E^{0}}_{H^{+} / \frac{1}{2} H_{2}} = 0.0 V$

I) $C u^{+ 1} (a q)$ is stronger oxidising agent than $C u^{+ 2} (a q)$

II) $C u^{+ 1} (a q)$ is less stable than $C u^{+ 2} (a q)$

III) $C u^{+ 1} (a q)$ readily reduced than $C u^{+ 2} t o C u (s)$

IV) $E^{0} C u / C u^{+ 2} = - 0.34 V,$ is –ve quantity, Cu can not evolve hydrogen gas from $1 N H_{2} S O_{4}$

The correct statements are

All are correct
I, II and III are only correct
IV is only correct
II, III and IV are only correct.

14)

#2652644

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Question :

Which of the following statements is incorrect

Adsorption always leads to a decrease in enthalpy and entropy of the system.
Adsorption arises due to unsaturation of valence forces of atoms or molecules on the surface.
Adsorption increases with rise in temperature.
Adsorption decreases surface energy.

15)

#2652655

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Question :

For the net cell reaction of the cell Zn(s) | Zn²⁺ || Cd²⁺ | Cd(s) $∆$ G⁰ in kJ at 25°C is ( $E_{c e l l}^{0} = 0.360 V)$ :

112.5
69.47
– 34.73
–69.48

16)

#2652662

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Question :

Which of the following is/are incorrect regarding dry cell

Mn is reduced from +4 to +3 state
NH₃ gas is evolved
Zn is used as anode
A paste of NH₄Cl and ZnCl₂ is used.

17)

#2652669

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Question :

The molar conductance of Acetic acid at infinite dilution if $\land^{0}$ for CH₃COONa, NaCl and HCl are 91.0, 126.5 and 426.2 S.cm²mol^-1 respectively.

517.2
552.7
390.7
217.5

18)

#2652700

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Question :

$A l^{3 +} (a q .) + 3 e^{-} \to A l (s); E ° = - 1.66 V$

$C u^{2 +} (a q .) + 2 e^{-} \to C u (s); E ° = + 0.34 V$

What voltage is produced under standard conditions by combining the half reactions with these standard electrode potentials.

1.32 V
2.00 V
2.30 V
4.34 V

19)

#2652704

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Question :

Equal volumes of 0.015 M CH₃COOH and 0.015 M NaOH are mixed together. What would be molar conductivity of mixture if conductivity of CH₃COONa is $6.3 \times 10^{- 4} S c m^{- 1}$

$8.4 S c m^{2} m o l^{- 1}$
$84 S c m^{2} m o l^{- 1}$
$4.2 S c m^{2} m o l^{- 1}$
$42 S c m^{2} m o l^{- 1}$

20)

#2652709

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Question :

Which products are formed first in the electrolysis of an aqueous solution of AlCl₃?

(I) Al(s) (II) Cl₂(g) (III) H₂ (g) (IV) O₂ (g)

I and III only
I and IV only
II and III only
II and IV only

21)

#2652715

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Question :

$2 A g^{+} (a q) + C u (s) \to C u^{2 +} (a q) + 2 A g (s)$ The standard potential for this reaction is 0.46 V. Which change will increase the potential the most?

Doubling the $[A g^{+}]$
Halving the $[C u^{2 +}]$
Doubling the size of the Cu(s) electrode
Decreasing the size of the Ag electrode by one half

22)

#2652724

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Question :

How many faradays are required to reduce all the chromium in 0.150 L of 0.115 M of $C r_{2} O_{7}^{2 -} t o C r^{2 +}$ ?

0.920 F
0.690 F
0.138 F
0.069 F

23)

#2652798

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Question :

The standard reduction potential of $C u^{2 +} / C u$ and $C u^{2 +} / C u^{+}$ are $0.337 V$ and $0.153 V$ respectively. The standard reduction potential of $C u^{1 +} / C u$ half cell is

$0.184 V$
$0.827 V$
$0.521 V$
$0.490 V$

24)

#2652813

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Question :

Electrolysis of an acetate solution produces ethane according to the Kolbe reaction :

$2 C H_{3} C O O^{-} \to C_{2} H_{6} + 2 C O_{2} + 2 e^{-}$

What volume of ethane is produced at 270C and 740 mm Hg, if a current of 0.500 A were passed through the solution for 7 h and the electrode reaction is 82% efficient?

2.70 L
5.4 L
1.35L
0.65 L

25)

#2652818

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Question :

A fuel cell develops an electrical potential from the combustion of butane at 1 bar and 298 K $C_{4} H_{10} (g) + 6.5 O_{2} (g) \to 4 C O_{2} (g) + 5 H_{2} O (l); Δ_{r} G^{0} = - 2746 k J / m o l$ what is $E^{0}$ of a cell?

4.74 V
0.547 V
4.37 V
1.09 V

26)

#2578239

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Question :

Which reaction involves neither oxidation nor reduction?

$C r O_{4}^{2 -} \to C r_{2} O_{7}^{2 -}$
$C r \to C r C l_{3}$
$N a \to N a^{+}$
$2 S_{2} O_{3}^{2 -} \to S_{4} O_{6}^{2 -}$

27)

#2578270

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Question :

The oxidation number of sulphur in S₈, S₂F₂, H₂S respectively, are

0, +1 and –2
`+2, +1 and –2
0, +1 and +2
–2, +1 and –2

28)

#2578282

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Question :

In which of the following compounds, the oxidation number of iodine is fractional ?

IF₇
$I \bar{3}$
IF₅
IF₃

29)

#2578329

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Question :

Which of the following elements does not show disproportionation tendency?

30)

#2578341

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Question :

2MnO $\bar{4}$ + 5H₂O₂+ 6H⁺ $\to$ 2 Z + 5O₂ + 8H₂O. In this reaction Z is

Mn⁺²
Mn⁺⁴
MnO₂
Mn

31)

#2578360

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Question :

Electrode potential data are given below :

$F e_{(a q)}^{+ 3} + e^{-} \to F e_{(a q)}^{+ 2}; E ° = + 0.77 V$

$A 1_{(a q)}^{3 +} + 3 e^{-} \to A 1_{(s)}; E ° = - 1.66 V$

$B r_{2 (a q)} + 2 e^{-} \to 2 B r_{(a q)}^{-}; E ° = + 1.08 V$

Based on the data, the reducing power of Fe²⁺, Al and Br^– will increase in the order

Br^– < Fe²⁺ < Al
Fe²⁺ < Al < Br^–
Al < Br^– < Fe²⁺
Al < Fe²⁺ < Br^–

32)

#2578374

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Question :

The standard electrode potentials of four elements A, B, C and D are –3.05, –1.66, –0.40 and +0.80. The highest chemical reactivity will be exhibited by

33)

#2578419

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Question :

Fill up the table from the given choice.

Element Oxidation number

Oxygen –2 in most compounds (i) in H2O2 and (ii) in OF2
Halogen                      –1 for (iii) in all its compounds
Hydrogen    (iv) in most of its compounds (v) in binary metallic hydrides
Sulphur                         (vi) in all sulphides

	(i)	(ii)	(iii)	(iv)	(v)	(vi)
(a)	+1	+1	Cl	+1	–1	+2
(b)	–1	+2	F	+1	–1	–2
(c)	–1	+1	F	+1	+2	+2
(d)	+1	+2	Cl	+1	+1	+6

34)

#2578437

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Question :

Which of the following act as reducing agents ?

(i) PO $\overset{3 -}{4}$ (ii) SO₃
(iii) PO $\overset{2 -}{3}$ (iv) NH₃

(i), (ii) and (iii)
Only (iii)
(i), (iii) and (iv)
(iii) and (iv)

35)

#2578458

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Question :

In the balanced chemical reaction

$I O_{3}^{-} + a l^{-} + b H^{-} \to c H_{2} O + d I_{2}$

a, b, c and d respectively corresponds to

5, 6, 3, 3
5, 3, 6, 3
3, 5, 3, 6
5, 6, 5, 5

36)

#2578462

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Question :

Acidic medium used in KMnO₄ can be made from which of the following acids?

HCl
H₂SO₄
HI
HBr

37)

#2578473

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Question :

What could be the X^–in the system, Where X signifies halogen ; formation of shown below X₂ takes place, when F₂is purge into aqueous solution of X^–?

Br ^–
Cl ^–
I ^–
All of these

38)

#2652459

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Question :

Ostwald dilution law of weak electrolyte H can be given as : ‘A’

$K_{a} = \frac{C \cdot α^{2}}{(1 - α)}$
$K_{a} = C \cdot α^{2} i f α < < < 1$
$K_{a} = \frac{C Λ^{2}}{Λ_{0} (Λ_{0} - Λ)}$
All of these

39)

#2652651

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Question :

$A g | \underset{I L}{A g^{+}} (1 M) | | \underset{I L}{A g^{+}} (2 M) | A g,$

0.5 F of electricity in anode and 1F electricity in the cathode is first passed making them independent electrolytic cell at 298K, EMF of cell after electrolysis will be

increased
decreased
no change
time is also required to find it

40)

#2652657

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Question :

Equivalent conductance of saturated BaSO₄ is 400 ohm^–1cm² equiv^–1 and specific conductance is 8 x 10^–5 ohm^–1 cm^–1. Hence K_sp of BaSO₄ is:

4 x 10^–8 M²
1 x 10^–8M²
2 x 10^–4 M²
1 x 10^–4 M²

41)

#2652666

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Question :

The electrolysis of aqueous solution of CuBr₂ using Pt electrodes would lead to evolving of

Br₂ gas at anode
Br₂ gas at anode and O₂ gas at cathode
Copper at anode
H₂O gas at cathode

42)

#2652677

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Question :

Which of the following is correct?

Specific conductivity of a solution decreases with dilution, whereas molar conductivity increases with dilution
Specific conductivity of a solution increases with dilution, whereas molar conductivity decreases with dilution
Both specific conductivity and molar conductivity decreases with dilution
Both specific conductivity and molar conductivity increases with dilution

43)

#2652701

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Question :

What is the approximate value of the equilibrium constant, Keq at 25⁰C for the reaction; $[\frac{2.303 R T}{F} = 0.06]$ $3 {Ag}^{+} (aq) + Cr (s) \to {Cr}^{3 +} (aq) + 3 Ag (s)$

$A g^{+} (a q) + e^{-} \to A g (s); E^{0} = + 0.80$

${Cr}^{3 +} (aq) + 3 e^{-} \to Cr (s); E^{0} = - 0.74$

10²²
10²⁶
10³³
10⁷⁷

44)

#2652707

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Question :

In the electrochemical cell $Pt H_{2} (g), 1 atm | H^{+} (1 M) | | {Cu}^{2 +} (1 M) | Cu (s),$

Which one of the following statements is true?

H₂ is cathode, Cu is anode
Oxidation occurs at Cu electrode
Reduction occurs at H₂ electrode
Pt is anode, Cu is cathode

45)

#2652712

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Question :

A current of 2.0 A is used to plate Ni(s) from 500 mL of a 1.0 M Ni²⁺ (aq) solution. What is the [Ni²⁺] (aq) after 3.0 h?

0.39 M
0.46 M
0.78 M
0.89 M

46)

#2652719

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Question :

How many moles of electrons must be transvered from each mole of toluene, C₆H₅CH₃, when it is oxidized to benzoic acid. C₆H₅COOH?

47)

#2652728

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Question :

Which of the following statement is NOT correct about an inert electrode in a cell ?

It is a connector of internal and external parts of cell
It does not participate in cell reaction
It provides surface for redox reaction
It provides surface for conduction of electrons

48)

#2652809

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Question :

The charge required for the reduction of 1 mole of $I_{2} t o I^{-}$ is

$96500 C$
$2 \times 96500 C$
$\frac{1}{2} \times 96500 C$
$4 \times 96500 C$

49)

#2652815

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Question :

Electrolysis of dilute aqeous NaCl solution was carried out bypassing 10 milli ampere current. The time required to liberate 0.01mole of H₂ gas at the cathode is (1 Faraday = 96500 C)

9.65 x 10⁴ sec
19.3 x 10⁴ sec
28.95 x 10⁴ sec
38.6 x 10⁴ sec

50)

#2652820

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Question :

The reduction potential of a $H g_{2}^{2 +} / H g$ electrode, if a 0.04 M KCl solution is present alongwith $H g_{2} C l_{2} (s)$ , is :

$(G i v e n E_{H g / H g_{2}^{2 +}}^{0} = - 0.79 V, K_{s p} (H g_{2} C l_{2}) = 1.6 \times 10^{- 18}, \frac{2.303 R T}{F} = 0.06)$

0.34V
0.11V
1.01V
1.24V

QPID #4593 (SET 3)