Question # 1

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

The potential difference set up at 25 C and 1 atm when clectrode is dipped m Tis one molar ionic sohution is called

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Single electrode potential

electrode potential

Standard electrode potential

Standard hydrogen electrode

The electrochemical reactions occurring at both the electrodes along with the electrolytic conduction constitute

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Oxidation

reduction

Redox reaction

electrolysis

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

By the electrolysis of CuCl2 using inert electrodes of platinum which species is deposited at cathode

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H2

O2

Cu

CI

In an electrochemical series, elements are arranged on the basis of

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pH scale

pKa scale

pOH scale

Hydrogen scale

On ascending the electrochemical series strength as reducing agent

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Increases

Decreases

Remains same

not determinable

The standard electrode potential of hydrogen is arbitrarily taken at 298k is

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1.00volt

0.10 volt

0.00 volt

10.0 volt

Which of the following statements is not correct about galvanic cell?

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Anode is negatively charged

Cathode is positively charged

Reduction occurs at anode

Reduction occurs at cathode

During space flights, astronauts ohlained water from

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Nickel cadmium cells

Lead accumulator

Fuel Cell

Alkaline battery

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 standard reduction potential of Zinc is

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0.76V

0.34

-0.34V

-0.76V

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

Which one of the following metals can replace the Copper from aqueous solution of its salt more easily?

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Cd

Fe

Zn

Na

The potential of SHE is taken as zero which is avalue

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Reference

Arbitrary

Exact

Experimental

Total number of valence electrons in CH4

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8

9

10

12

The element with highest E°red

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N

F

O

CI

Stronger the oxidizing agent, higher is

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Redox potential

Standard reduction potential

Reduction potential

_{Oxidation potemial}

In which molecule. all atoms are coplanar?

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CH4

BF3

NH3

PH3

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

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