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

Question-1
Plaster of Paris when mixed with water set quickly into hard is known as?

(A) Cement	(B) Concrete
(C) Gypsum	(D) Epsom

Question-2
The pale yellow silver bromide turns grey when exposed to?

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

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
Reaction accompained by absorption of heat is called?

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

Question-5
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-6
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-7
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-8
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-9
The chemical reaction in which H₂ is less is called?

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

Question-10
The formula of potassium chromate is

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

Click here to see your answersheet and detailed track records.

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