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

Question-1
CaCO₃₍₃₎ → CaO_(g) + CO_2(g) . This is an example of?

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

Question-2
Chemical reactions in which reactants gain hydrogen is called

(A) Oxidation reaction	(B) Reduction reaction
(C) Combination reaction	(D) Displacement reaction

Question-3
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-4
Reaction accompained by absorption of heat is called?

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

Question-5
The product in the reaction 2Cu + O_{2 →} 2CuO is?

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

Question-6
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-7
What is the chemical formula of rust?

(A) Fe	(B) Fe₂O₃
(C) Fe₂O₃H₂O	(D) FeO

Question-8
Write chemical formula of Alumina?

(A) AlO₄	(B) AlO₃
(C) Al₂O₄	(D) Al₂O₃

Question-9
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-10
The formula of potassium chromate is

(A) K₂CrO₄	(B) K₂Cr₂O₇
(C) KCrO₆	(D) K₂Cr₂O₈

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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
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