Maharashtra (English Medium) Std 10 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
The reactions a precipitate is formed by exchange of ions between the reactants are called

(A) Double displacement reactions	(B) Combination reactions
(C) Decomposition reactions	(D) Displacement reactions

Question-2
When two or more substances combine to form single product , then the reaction is called

(A) Condensation reaction	(B) Combination reaction
(C) Decomposition reaction	(D) Double decomposition reaction

Question-3
A pinkish brown coating formed when black copper oxide is reacted with hydrogen is due to

(A) Oxygen	(B) Hydrogen
(C) Air	(D) Copper

Question-4
When a more reactive element removes another element from its compound, these reactions are called

(A) Combination reaction	(B) Decomposition reaction
(C) Displacement reaction	(D) Doublede-composition reactions

Question-5
The pale yellow silver bromide turns grey when exposed to?

(A) Heat	(B) Catalyst
(C) High presure	(D) Sunlight

Question-6
Storage of food in airtight containers prevents?

(A) Oxidation	(B) Reduction
(C) Combination	(D) Corrosion

Question-7
The slow process of decay of metal due to the effect of air, acids and moisture on it called

(A) Combination	(B) Displacement
(C) Reduction	(D) Corrosion

Question-8
Reaction accompained by absorption of heat is called?

(A) Oxidation	(B) Endothermic reaction
(C) Exothermic reaction	(D) Combination reaction

Question-9
What is the chemical formula of rust?

(A) Fe	(B) Fe₂O₃
(C) Fe₂O₃H₂O	(D) FeO

Question-10
Write chemical formula of Alumina?

(A) AlO₄	(B) AlO₃
(C) Al₂O₄	(D) Al₂O₃

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Std 10

Maharashtra (English Medium)

Practice in Related Chapters
School of Elements
Understanding Metals and Non metals
The Acid Base Chemistry
The Magic of Chemical Reactions