IGCSE O Level Chemistry Practice Test 78

Chemical to Electrical Energy MCQ (Multiple Choice Questions) PDF - 78

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Chemical to Electrical Energy Questions and Answers PDF Download: Quiz 78

MCQ 386: Duration of bright-bulb can be enhanced, if along with copper

magnesium is used
the acid is more dilute
zinc
graphite

MCQ 387: Sulfate ion can be written symbolically as

SO₄^2-
SO₃^2-
SO₄^2-
S^2-

MCQ 388: What is true about Impurities?

they lowers the boiling point
they lowers the freezing point
they lowers melting points
they raises the melting point

MCQ 389: Sodium Carbonate Na₂CO₃ indicates that for each Carbonate ion (CO₃^-2), number of Sodium ions (Na⁺) are

MCQ 390: The chemical formula of anhydrous Monosodium Phosphate is

NaPO₃
NaH₂PO₄
Na₂CO₃.10H₂O
NaH₂PO₄.H₂O

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