$CATEGORY: Science - Khan Academy/2.Acids, Bases and Salts/2.Acids, Bases and Salts--Understanding of Chemical properties of acids and basis

//Multiple Choice

What is the product formed when magnesium oxide reacts with HCl?
{
~ Magnesium hydroxide
= Magnesium chloride
~ Calcium chloride
~ Magnesium sulphate
}

What does calcium oxide (CaO) form when it reacts with hydrochloric acid (HCl)?
{
= Calcium chloride and water
~ Calcium chloride and carbon dioxide
~ Calcium hydroxide and water
~ Calcium sulphate and water
}

When calcium oxide reacts with water, what ions are formed?
{
= Calcium ions (Ca²⁺) and hydroxide ions (OH⁻)
~ Calcium ions (Ca²⁺) and chloride ions (Cl⁻)
~ Calcium ions (Ca²⁺) and oxygen ions (O²⁻)
~ Sodium ions (Na⁺) and hydroxide ions (OH⁻)
}

Which of the following is true about the nature of metal oxides like magnesium oxide?
{
~ They are acidic in nature.
~ They are neutral in nature.
= They are basic in nature.
~ They are amphoteric in nature.
}

What happens when magnesium oxide reacts with hydrochloric acid?
{
~ A salt and oxygen are produced.
= A salt and water are produced.
~ Only water is produced.
~ Only carbon dioxide is produced.
}

Which ion is responsible for the basic nature of calcium oxide when dissolved in water?
{
~ Ca²⁺ ions
= OH⁻ ions
~ H⁺ ions
~ O²⁻ ions
}

Which of the following is formed when carbon dioxide reacts with sodium hydroxide?
{
~ Sodium hydroxide
= Sodium carbonate
~ Sodium bicarbonate
~ Sodium chloride
}

What type of oxides are formed by metals?
{
~ Acidic oxides
= Basic oxides
~ Neutral oxides
~ Amphoteric oxides
}

What happens when a non-metallic oxide reacts with a base?
{
= It forms a salt and water.
~ It forms only water.
~ It forms only gas.
~ It forms an acidic solution.
}

Which of the following is true about non-metal oxides like carbon dioxide?
{
= They are acidic in nature.
~ They are basic in nature.
~ They are neutral in nature.
~ They are amphoteric in nature.
}

What does the reaction of a non-metallic oxide with a base result in?
{
= Formation of a salt and water
~ Formation of a salt and oxygen
~ No reaction
~ Formation of an acid
}

//True or False

Magnesium oxide is an acidic oxide. {F}

Metal oxides are generally basic in nature. {T}

When calcium oxide reacts with water, hydroxide ions are produced. {T}

Non-metal oxides, like carbon dioxide, are acidic in nature. {T}

Metal oxides react with acids to produce salt and oxygen. {F}

Non-metal oxides react with bases to form salt and water. {T}

Calcium oxide does not react with hydrochloric acid. {F}

Metal oxides like magnesium oxide can dissolve in water to form hydroxide ions. {T}

Non-metallic oxides are usually basic in nature. {F}

When carbon dioxide dissolves in water, it forms an alkaline solution. {F}

The reaction between a base and a non-metal oxide produces only water. {F}

Calcium oxide reacts with sodium hydroxide to form new products. {F}

Magnesium chloride is formed when magnesium oxide reacts with hydrochloric acid. {T}

Alkaline solutions formed by metal oxides are basic in nature. {T}

//Fill in the blanks

Formula of the product formed when Magnesium oxide (MgO) reacts with hydrochloric acid (HCl) is ______.
{
~ Mg(OH)₂
= MgCl₂
~ MgSO₄
}

The product of calcium oxide (CaO) reacting with HCl is ______.
{
= Calcium chloride and water
~ Calcium carbonate
~ Calcium hydroxide
}

Non-metallic oxides, like carbon dioxide, form ______ when dissolved in water.
{
~ Sodium hydroxide
= Carbonic acid
~ Sulfuric acid
}

Metal oxides, like magnesium oxide, are generally ______ in nature.
{
~ Acidic
= Basic
~ Amphoteric
}

The reaction between a base and a non-metallic oxide results in ______.
{
= A salt and water
~ Only gas
~ Only water
}

Non-metal oxides generally increase the number of ______ ions when dissolved in water.
{
~ OH⁻
~ Na⁺
= H⁺
}

The product of a metal oxide reacting with hydrochloric acid is ______.
{
= A salt and water
~ A gas and a salt
~ A gas and water
}

Metal oxides like calcium oxide ______ water to form hydroxide ions.
{
= React with
~ Do not react
~ Dissolve in
}

When carbon dioxide is dissolved in water, it forms ______ ions.
{
~ H⁺ and CO₃²⁻
= H⁺ and HCO₃⁻
~ OH⁻ and CO₂
}

//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=CaO dissociates in water -> Produces OH⁻
=Carbon dioxide dissolves in water -> H⁺ and HCO₃⁻
=Magnesium oxide -> Basic in nature
=Carbon dioxide reacts with sodium hydroxide -> Forms a salt (sodium carbonate)
}


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