Question # 1

Total number of valence electrons in CH4

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8

9

10

12

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 emf produced by galvanic cell is called

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Cell potential

Oxidation potential

Redox potential

Reduction potential

Which of the following metal does not liberate hydrogen on reaction with acid?

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Mg

Pt

Zn

Ca

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

Which of the following bonds is not present in NH4CL

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lonic bond

Covalent bond

Co-ordinate covalent bond

De-localized covalent bond

The value of oxidation number of chlorine in HCIOs is

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+7

+5

-1

+3

Stronger is the oxidizing agent, stronger is the

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emf of cell

Oxidation potential

Reduction potential

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

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pH scale

pKa scale

pOH scale

Hydrogen scale

Electrolytic products of dilute aqueous solution of sodium sulphate is

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Na. SO2

H2. S02

Na. O2

H2,O2

In all oxidation reactions, atoms of an element in a chemical species lose electrons and increases their

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Oxidation states

Reduction states

Electrode

Negative charges

The standard reduction potential of Zinc is

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0.76V

0.34

-0.34V

-0.76V

Most reactive among the following

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Li

Mg

Ca

Na

The working condition/s for SHE

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1atm pressure

1M H-solution

298K temperature

All of these

The oxidation state of carbon in C2O-²4 is

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+4

-4

+3

+2

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

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Oxidation

reduction

Redox reaction

electrolysis

Which of following is oxidation state of oxygen in peroxides?

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-2

1/2

-1

+2

If a strip of Cu metal is placed in a solution of FeSO4

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Cu will be deposited

Cu and Fe both dissolve

Fe is precipitated out

No reaction take place

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