1. CHEMICAL REACTIONS-A&R’S-1

Assertion : Products are written on the right side of a word equation. Reason : Its arrowhead points towards the products. Assertion : Products are written on the right side of a word equation. Reason : Its arrowhead points towards the products.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Calcium oxide is called quick lime. Reason : The chapter identifies CaO as quick lime. Assertion : Calcium oxide is called quick lime. Reason : The chapter identifies CaO as quick lime.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Carbon electrodes are not used in electrolysis. Reason : The other product formed is sodium chloride, which remains in solution. Assertion : Carbon electrodes are not used in electrolysis. Reason : The other product formed is sodium chloride, which remains in solution.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Hydrogen loses oxygen when forming water. Reason : Chemical reactions involve rearrangement of atoms through breaking and making bonds. Assertion : Hydrogen loses oxygen when forming water. Reason : Chemical reactions involve rearrangement of atoms through breaking and making bonds.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : A skeletal chemical equation may need balancing. Reason : Its atom counts may not be equal on both sides. Assertion : A skeletal chemical equation may need balancing. Reason : Its atom counts may not be equal on both sides.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : A word equation represents a chemical reaction. Reason : The arrow points from reactants towards products. Assertion : A word equation represents a chemical reaction. Reason : The arrow points from reactants towards products.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : CaO + H2O → Ca(OH)2 is a combination reaction. Reason : Atoms are created during a chemical reaction. Assertion : CaO + H2O → Ca(OH)2 is a combination reaction. Reason : Atoms are created during a chemical reaction.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Products are written on the left side. Reason : Symbols for solid, liquid, gas and aqueous states specify physical states. Assertion : Products are written on the left side. Reason : Symbols for solid, liquid, gas and aqueous states specify physical states.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : (s) denotes the solid state in a chemical equation. Reason : Exothermic reactions absorb energy. Assertion : (s) denotes the solid state in a chemical equation. Reason : Exothermic reactions absorb energy.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Burning natural gas is exothermic. Reason : Glucose combines with oxygen and provides energy. Assertion : Burning natural gas is exothermic. Reason : Glucose combines with oxygen and provides energy.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Double displacement reactions do not involve ion exchange. Reason : One reactant is oxidised while another is reduced. Assertion : Double displacement reactions do not involve ion exchange. Reason : One reactant is oxidised while another is reduced.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Iron is less reactive than copper. Reason : The other product formed is sodium chloride, which remains in solution. Assertion : Iron is less reactive than copper. Reason : The other product formed is sodium chloride, which remains in solution.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Silver bromide also decomposes in sunlight. Reason : Their light-induced decomposition is used in photography. Assertion : Silver bromide also decomposes in sunlight. Reason : Their light-induced decomposition is used in photography.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Antioxidants are added to foods containing fats and oils. Reason : (aq) denotes the gaseous state. Assertion : Antioxidants are added to foods containing fats and oils. Reason : (aq) denotes the gaseous state.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : The equation 2NaOH + H2SO4 → Na2SO4 + 2H2O is unbalanced. Reason : The chapter states that white AgCl turns grey in sunlight. Assertion : The equation 2NaOH + H2SO4 → Na2SO4 + 2H2O is unbalanced. Reason : The chapter states that white AgCl turns grey in sunlight.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Heating copper powder produces a black coating. Reason : Electrolysis of water produces no gases. Assertion : Heating copper powder produces a black coating. Reason : Electrolysis of water produces no gases.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Subscripts should not be changed while balancing equations. Reason : Changing a formula would change the substance represented. Assertion : Subscripts should not be changed while balancing equations. Reason : Changing a formula would change the substance represented.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Magnesium ribbon is cleaned before burning. Reason : Chemical reactions are never indicated by a change in colour. Assertion : Magnesium ribbon is cleaned before burning. Reason : Chemical reactions are never indicated by a change in colour.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Atoms of one element become atoms of another in these reactions. Reason : The numbers of oxygen atoms are unequal on the two sides. Assertion : Atoms of one element become atoms of another in these reactions. Reason : The numbers of oxygen atoms are unequal on the two sides.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Burning magnesium produces a black powder. Reason : The arrow points from reactants towards products. Assertion : Burning magnesium produces a black powder. Reason : The arrow points from reactants towards products.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Dilute sulphuric acid is not added in the electrolysis activity. Reason : Copper(II) oxide is reduced when it loses oxygen. Assertion : Dilute sulphuric acid is not added in the electrolysis activity. Reason : Copper(II) oxide is reduced when it loses oxygen.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : A balanced equation has equal numbers of each type of atom on both sides. Reason : (g) denotes the solid state. Assertion : A balanced equation has equal numbers of each type of atom on both sides. Reason : (g) denotes the solid state.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Magnesium ribbon is cleaned before burning. Reason : Rubbing it with sandpaper removes the surface coating. Assertion : Magnesium ribbon is cleaned before burning. Reason : Rubbing it with sandpaper removes the surface coating.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Sodium chloride remains in solution in the barium sulphate precipitation reaction. Reason : Heating lead nitrate produces green fumes. Assertion : Sodium chloride remains in solution in the barium sulphate precipitation reaction. Reason : Heating lead nitrate produces green fumes.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Products are written on the right side of a word equation. Reason : The arrowhead points towards the products. Assertion : Products are written on the right side of a word equation. Reason : The arrowhead points towards the products.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Sodium reacts with water to form sodium hydroxide and hydrogen. Reason : This reaction forms the calcium carbonate layer in whitewashing. Assertion : Sodium reacts with water to form sodium hydroxide and hydrogen. Reason : This reaction forms the calcium carbonate layer in whitewashing.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : A combination reaction forms a single product. Reason : Two reactants combine to form a single product. Assertion : A combination reaction forms a single product. Reason : Two reactants combine to form a single product.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Lead can displace copper from copper chloride. Reason : Decomposition reactions always form one product. Assertion : Lead can displace copper from copper chloride. Reason : Decomposition reactions always form one product.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : The burning of magnesium is a chemical reaction. Reason : Chemical reactions may produce substances with different colours. Assertion : The burning of magnesium is a chemical reaction. Reason : Chemical reactions may produce substances with different colours.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion : Antioxidants are added to foods containing fats and oils. Reason : They help slow the oxidation of fats and oils. Assertion : Antioxidants are added to foods containing fats and oils. Reason : They help slow the oxidation of fats and oils.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

1. CHEMICAL REACTIONS-A&R’S-1 : Question 1 of 30