MCQ questions for class 10 Science Chapter 1 Chemical Reactions
Question 1: What is the product of the reaction between sulfuric acid and sodium hydroxide?
Water
Salt
Hydrogen gas
Oxygen gas
Question 2: What is the chemical formula for hydrobromic acid?
HBr
H2Br2
HBrO3
HBrO4
Question 3: Which gas is evolved when hydrochloric acid reacts with calcium?
O2
CO2
H2
N2
Question 4: What is the product when sulfur dioxide reacts with oxygen?
Sulfur trioxide
Sulfur hexafluoride
Sulfuric acid
Sulfur dioxide
Question 5: What is the chemical formula for ammonia?
NH4
NH3
NH2
N2H2
Question 6: What happens when a base reacts with a metal?
Evolution of gas
Change in color
Formation of a precipitate
No observable change
Question 7: What is the product of the reaction between hydrochloric acid and magnesium oxide?
Water
Salt
Hydrogen gas
Oxygen gas
Question 8: What is the chemical formula for potassium hydroxide?
KOH
K2CO3
KCl
KNO3
Question 9: What is the color change observed during the litmus test for a neutral solution?
Red to blue
Blue to red
Yellow to green
No color change
Question 10: Which gas is evolved when sulfuric acid reacts with sodium bicarbonate?
O2
CO2
H2
N2
Question 11: What is the product when hydrochloric acid reacts with zinc?
Water
Salt
Hydrogen gas
Oxygen gas
Question 12: What is the chemical formula for sulfur dioxide?
SO2
SO3
SO4
S2O3
Question 13: What happens when calcium oxide reacts with water?
Formation of salt
Evolution of gas
Formation of an acid
Formation of a base
Question 14: What is the product of the reaction between hydrochloric acid and sodium carbonate?
Water
Salt
Hydrogen gas
Oxygen gas
Question 15: What is the chemical formula for carbon dioxide?
CO
CO2
C2O
CO3
Question 16: What is the product when copper oxide reacts with hydrochloric acid?
Water
Salt
Hydrogen gas
Oxygen gas
Question 17: What happens when magnesium reacts with oxygen?
Formation of oxides
Formation of hydroxides
Formation of carbonates
Formation of sulfides
Question 18: What is the chemical formula for acetic acid?
HCl
HNO3
CH3COOH
H2SO4
Question 19: Which gas is evolved when hydrochloric acid reacts with sodium sulfide?
O2
CO2
H2S
N2
Question 20: What is the chemical formula for methane?
CH4
C2H6
C3H8
CO2
Question 21: What is the product of the reaction between nitric acid and calcium hydroxide?
Water
Salt
Hydrogen gas
Nitrogen gas
Question 22: What type of reaction is represented by the equation: 2H2 + O2 → 2H2O?
Combination reaction
Decomposition reaction
Displacement reaction
Double displacement reaction
Question 23: What is the chemical formula for sodium carbonate?
Na2CO3
NaHCO3
NaNO3
NaCl
Question 24: What happens when zinc reacts with dilute hydrochloric acid?
Evolution of gas
Change in color
Formation of a precipitate
No observable change
Question 25: What is the product of the reaction between sodium hydroxide and hydrochloric acid?
Water
Salt
Hydrogen gas
Oxygen gas
Question 26: What is the chemical formula for potassium permanganate?
K2MnO4
KMnO4
K2CrO4
KCrO4
Question 27: Which gas is evolved when hydrochloric acid reacts with calcium carbonate?
O2
CO2
H2
N2
Question 28: What is the product when sodium carbonate reacts with hydrochloric acid?
Water
Salt
Hydrogen gas
Oxygen gas
Question 29: What happens when iron reacts with steam?
Formation of oxides
Formation of hydroxides
Formation of carbonates
Formation of sulfides
Question 30: What is the chemical formula for hydrogen peroxide?
H2O2
H2CO3
H2SO4
H2S
Question 31: What happens when copper sulfate solution reacts with iron?
Formation of salt
Evolution of gas
Formation of an acid
Formation of a base
Question 32: What type of reaction is represented by the equation: CH4 + 2O2 → CO2 + 2H2O?
Combination reaction
Decomposition reaction
Displacement reaction
Double displacement reaction
Question 33: What is the chemical formula for magnesium chloride?
MgCl
MgCl2
MgCl3
Mg2Cl
Question 34: What is the product of the reaction between nitric acid and copper?
Water
Salt
Hydrogen gas
Nitrogen gas
Question 35: What happens when barium chloride reacts with sodium sulfate?
Formation of salt
Evolution of gas
Formation of an acid
Formation of a base
Question 36: What is the chemical formula for hydrochloric acid?
HCl
H2CO3
HNO3
H2SO4
Question 37: What is the product of the reaction between sodium sulfate and barium chloride?
Water
Salt
Hydrogen gas
Oxygen gas
Question 38: What type of reaction is represented by the equation: Pb(NO3)2 + 2KI → PbI2 + 2KNO3 ?
Combination reaction
Decomposition reaction
Displacement reaction
Double displacement reaction
Question 39: What is the chemical formula for sodium hydroxide?
NaOH
NaCl
NaNO3
NaHCO3
Question 40: What is the product of the reaction between sulfuric acid and calcium carbonate?
Water
Salt
Hydrogen gas
Carbon dioxide gas
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