$CATEGORY: Science - Khan Academy/3.Metals and Non-metals/3.Metals and Non-metals--Occurence of Metals

//Multiple Choice

Which of the following metal oxides is amphoteric in nature?
{
~ Sodium oxide (Na₂O)
= Aluminum oxide (Al₂O₃)
~ Magnesium oxide (MgO)
~ Calcium oxide (CaO)
}

Metal oxides of alkali metals are generally\:
{
~ Neutral
= Basic
~ Acidic
~ Amphoteric
}

Which metal oxide is soluble in water and forms an alkaline solution?
{
~ Zinc oxide (ZnO)
~ Copper oxide (CuO)
= Sodium oxide (Na₂O)
~ Aluminum oxide (Al₂O₃)
}

Which of the following metal oxides reacts with both acids and bases?
{
~ Magnesium oxide (MgO)
= Zinc oxide (ZnO)
~ Iron(III) oxide (Fe₂O₃)
~ Potassium oxide (K₂O)
}

Which of the following oxides is acidic in nature?
{
= Carbon dioxide (CO₂)
~ Magnesium oxide (MgO)
~ Zinc oxide (ZnO)
~ Sodium oxide (Na₂O)
}

//True or False

Sodium oxide is a basic oxide. {T}

Amphoteric oxides can only react with bases. {F}

Magnesium oxide forms an acidic solution in water. {F}

Zinc oxide is an example of an amphoteric oxide. {T}

Carbon monoxide (CO) is a neutral oxide. {T}

//Fill in the blanks

Metal oxides of alkali metals are __________ in nature.
{
~ Acidic
= Basic
~ Neutral
}

Amphoteric oxides react with __________.
{
~ Acids only
~ Bases only
= Both acids and bases
}

Magnesium oxide forms __________ when dissolved in water.
{
~ Acidic solution
= Alkaline solution
~ Neutral solution
}

The oxide of zinc reacts with hydrochloric acid to form __________.
{
= Zinc chloride
~ Zinc sulfate
~ Zinc carbonate
}

Metal oxides that do not dissolve in water are termed as __________.
{
= Insoluble oxides
~ Neutral oxides
~ Acidic oxides
}

//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Sodium oxide (Na₂O) -> Basic oxide
=Zinc oxide (ZnO) -> Amphoteric oxide
=Magnesium oxide (MgO) -> Forms an alkaline solution
=Carbon dioxide (CO₂) -> Acidic oxide
=Carbon monoxide (CO) -> Neutral oxide
}


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