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WorksheetsChemical Reaction and its Equation
Total questions: 10
Worksheet time: 7mins
Which of the following is a displacement reaction?
MgCO3 =====> MgO + CO2
2Na + 2H2O =====> 2NaOH +H2
2H2 + O2 =====> 2H2O
Magnesium ribbon is rubbed before burning because it has a coating of
basic magnesium carbonate
basic magnesium oxide
basic magnesium sulphide
basic magnesium chloride
Which of the following statements about the given reaction are correct?
3Fe (s) + 4H2O (g) → Fe3O4 (s) + 4 H2 (g)
Iron metal is getting oxidised
Water is getting reduced
Water is acting as reducing agent
Water is acting as oxidising agent
Which of the following are exothermic processes?
Reaction of water with quick lime
Dilution of an acid
Evaporation of water
Sublimation of camphor (crystals)
Oxidation is a process which involves
(a)
The process of reduction involves
addition of oxygen
addition of hydrogen
removal of oxygen
removal of hydrogen
Three beakers labelled as A, B and C each containing 25 ml of water were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solution contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is (are) correct?
In beakers A and B, exothermic process has occurred.
In beakers A and B, endothermic process has occuBftd.
In beaker C exothermic process has occurred.
In beaker C endothermic process has occurred.
Give the ratio in which hydrogen and oxygen are present in water by volume.
1:2
1:1
2:1
1:8
Which among the following statement(s) is (are) true?
Exposure of silver chloride to sunlight for a long duration turns grey due to
The formation of silver by decomposition of silver chloride
Sublimation of silver chloride
Decomposition of chlorine gas from silver chloride
Oxidation of silver chloride
MnO2 + 4HCl → 2 + 2H2O + Cl2
Identify the substance oxidized in the above 👆 equation.
MnCl2
HCl
H2O
MnO2
