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O Level Chemistry Practice Test 5

Atoms and Elements Quiz Questions PDF - 5

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Chemistry Quiz: Atoms & Elements MCQs PDF Download - 5

MCQ: Brass is an example of an/a

A) alloy
B) compound
C) mixture
D) element

MCQ: If acidified Potassium Dichromate(VI) (K2Cr2O7) acts as oxidizing agent, color changes from

A) orange to red
B) orange to green
C) yellow to green
D) yellow to red

MCQ: A particle maybe a/an

A) atom
B) molecule
C) isotope
D) all of above

MCQ: If the proton (p+) number of an element changes, it will become a/an

A) isotope
B) another element
C) electrolyte
D) none of above

MCQ: Aluminum (Al) is preferred in overhead power cables because

A) it is a good conductor
B) it acts as an insulator, in case of lightening
C) it prevents accidents
D) it is lighter in weight

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