Question # 1

The value of oxidation number of chlorine in HCIOs is

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+7

+5

-1

+3

Which of following is oxidation state of oxygen in peroxides?

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-2

1/2

-1

+2

The oxidation state of carbon in C2O-²4 is

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+4

-4

+3

+2

Stronger is the oxidizing agent, stronger is the

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emf of cell

Oxidation potential

Reduction potential

On ascending the electrochemical series strength as reducing agent

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Increases

Decreases

Remains same

not determinable

Total number of valence electrons in CH4

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8

9

10

12

Most reactive among the following

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Li

Mg

Ca

Na

Which of the following best describes the shape and polarity of the carbon disulphide molecule?

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Bent and polar

Linear and non-polar

Pyramidal and polar

Bent and non-polar

Zinc reacts with dilute acids to liberate hydrogen. This is because:

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Zn2+ ion is a powertul osidising agent than H' ion

H+ ion is a powerful oxidising agent than Zn ion

Zn2+ ion is a powerful reducing agent than H' ion

H+' ion is a powerful reducing agent than Zn- ian

SHE acts as anode when connected with Cu electrode but act as cathode with Zn electrode

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Zn has less reduction potential than hydrogen and Cu

Zn has high reductionl potential than hydrogen

and Cu

Zn is below electrochemical series than hydrogen and Cu

Zn has least tendency to lose electron

The products of electrolysis of which of the followings are known

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Fused electrolyte

Aqueous solution of eleetrolyte

Solid electrolyte

Solid metal

The element with highest E°red

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N

F

O

CI

Electrolytic products of dilute aqueous solution of sodium sulphate is

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Na. SO2

H2. S02

Na. O2

H2,O2

Which of the following salts would give the same products irrespective of whether its molten form or concentrated aqueous solution is electrolysed?

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Magnesium bromide

Magnesium sulphate

Copper sulphate

Copper chloride

The working condition/s for SHE

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1atm pressure

1M H-solution

298K temperature

All of these

During the electrolysis of Fused NaCI, the products are

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Na and H2

Na and Cl2

Na and O2

H2 and Cl2

Stronger the oxidizing agent, higher is

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Redox potential

Standard reduction potential

Reduction potential

_{Oxidation potemial}

Only those metals can replace Hydrogen from dilute acids, which have

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High negative reduction potential

Low negative reduction potential

High positive reduction potential

low positive reduction potential

Coinage metals Cu, Ag and Au are the least reactive because they have

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Negative reduction potential

Negative oxidation potential

Positive reduction potential

Positive oxidation potential

^{The common oxidation number of halogens is}

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-1

+1

-2

0

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