Chemistry - Mock Test 23

Question 221

In chromium plating few drops of Sulphuric acid are added to electrolyte in order to prevent ?

A) oxidation B) reduction C) hydrolysis D) sublimation

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Question 222

By losing one or two electrons atoms of metal are ?

A) oxidized B) reduced C) hydrogenated D) sublimated

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Question 223

A reactant containing element that is oxidized is called ?

A) reducing agent B) oxidizing agent C) hydrogen D) sublime

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Question 224

Electrolysis of brine produces ?

A) chlorine gas B) hydrogen gas C) sodium hydroxide D) all of above

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Question 225

When zinc is plated on steel, anode is made up of ?

A) steel B) oxygen C) zinc D) carbon

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Question 226

Galvanic cells are also named as ?

A) electrolytic cells B) battery cells C) Daniel cells D) john cells

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Question 227

Oxidation state of any free element is always ?

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

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Question 228

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 229

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 230

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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