Question # 1

During space flights, astronauts ohlained water from

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Nickel cadmium cells

Lead accumulator

Fuel Cell

Alkaline battery

The emf produced by galvanic cell is called

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Cell potential

Oxidation potential

Redox potential

Reduction potential

Geometry of NH3 is

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^Tetrahedral

Square planer

Pyramidal

Linear

Rusting of iron metal Fe occurs when Fe gets converted into Fe2O3 What happen with Fe?

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F'e is neutralized

Fe is sublimed

Fe is reduced

Fe is oxidized

On ascending the electrochemical series strength as reducing agent

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Increases

Decreases

Remains same

not determinable

The reduction potentials of non-metals are A =+0.54V, B=+1.08V, C=+1.36V. D= +2.87V Which non -metal can displace all other from aqucous solution of their salts

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A

C

B

D

The electrochemical series is based on

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pH scale

Redox scale

Hdrogen scale

Arrhenius scale

The potential of SHE is taken as zero which is avalue

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Reference

Arbitrary

Exact

Experimental

Which one of the following elements is the strongest reducing agent?

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Chlorine

Sodium

Magnesium

Aluminium

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

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

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Negative reduction potential

Positive reduction potential

Negative oxidation potential

Positive oxidation potential

Which of following is oxidation state of oxygen in peroxides?

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-2

1/2

-1

+2

During oxidation process, oxidation number of an element

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Decreases

Increases

Remains constant

Both a and b

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

Which molecule is least ionic"

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NaCI

HCL

HF

CsF

Most reactive among the following

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Li

Mg

Ca

Na

Which of the following is an application of electrochemical series

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Prediction of the feasibility of chemical reaction

Calculation of the cell voltage

Prediction of reaction of metal with dilute acid

All of the above

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

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MDCAT Chemistry Chapter 8 Thermo-chemistry and Energetics of chemical reactions Online Test MCQs With Answers

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