Chemistry - Comprehensive Mock Test 19

Question 181 Easy

Oxidation state of any free element is always ?

A) 1 B) 2 C) 3 D) None

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Question 182 Easy

Voltaic cells generates electricity by ?

A) spontaneous redox reaction B) non spontaneous redox reaction C) sublimation reaction D) thermochemical reaction

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Question 183 Medium

A physical or chemical process that occurs by itself is called ?

A) non spontaneous B) self occurring process C) spontaneous process D) thermodynamic process

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Question 184 Medium

Process used to deposit one metal over another metal is called ?

A) electrolysis B) electroplating C) carbon plating D) none of above

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Question 185 Easy

Electrolyte among following is ?

A) NaOH B) urea C) glucose D) benzene

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Question 186 Easy

Electrochemical cells convert ?

A) mechanical energy in to electrical energy B) potential energy in to electrical energy C) kinetic energy in to electrical energy D) chemical energy in to electrical energy

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Question 187 Easy

Conditions for good electroplating are ?

A) high current density B) low temperature C) high concentration of metal in electrolyte D) all of above

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Question 188 Easy

Lead and Zinc metals occur naturally as ?

A) oxides B) sulphite ores C) carbon ores D) chloride ores

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Question 189 Easy

Oxidation-reduction reaction involves ?

A) transfer of neutrons B) transfer of protons C) transfer of electrons D) none of above

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Question 190 Easy

As compare to iron, aluminum has ?

A) higher tendency to oxidize B) less tendency to oxidize C) equal tendency to oxidize D) none of above

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