(A) $(i)$ Brass is a mixture (it is an alloy of copper and zinc).$(ii)$ Diamond is an element (it is an allotrope of carbon,consisting only of carbon

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Brass: Mixture,Diamond: Element,Sand: Compound

(A) $(i)$ Brass is a mixture (it is an alloy of copper and zinc).$(ii)$ Diamond is an element (it is an allotrope of carbon,consisting only of carbon atoms).$(iii)$ Sand is a compound (it is primarily silicon dioxide,$SiO_2$).

Class 9 Science IS MATTER AROUND US PURE?Mix Example - IS MATTER AROUND US PURE?

Easy

Identify which of the following are elements,mixtures,or compounds:
$(i)$ Brass $(ii)$ Diamond $(iii)$ Sand.

A
Brass: Mixture,Diamond: Element,Sand: Compound
B
Brass: Compound,Diamond: Element,Sand: Mixture
C
Brass: Element,Diamond: Mixture,Sand: Compound
D
Brass: Mixture,Diamond: Compound,Sand: Element

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IS MATTER AROUND US PURE?

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Mix Example - IS MATTER AROUND US PURE?

On heating,calcium carbonate gets converted into calcium oxide and carbon dioxide.
$(a)$ Is this a physical or a chemical change?
$(b)$ Can you prepare one acidic and one basic solution by using the products formed in the above process? If so,write the chemical equations involved.

Medium

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While diluting a solution of salt in water,a student by mistake added acetone (boiling point $56\,^oC$). What technique can be employed to get back the acetone? Justify your choice.

Easy

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Smoke and fog both are aerosols. In what way are they different?

Easy

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Differentiate between an element and a compound (any two points). Give one example each.

Medium

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$(a)$ Calculate the mass of potassium chloride required to prepare its $40 \%$ solution in $100 \, g$ of water.
$(b)$ Explain the term solubility and the effect of temperature on it.

Medium

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Identify which of the following are elements,mixtures,or compounds:$(i)$ Brass $(ii)$ Diamond $(iii)$ Sand.

Similar Questions

On heating,calcium carbonate gets converted into calcium oxide and carbon dioxide.$(a)$ Is this a physical or a chemical change?$(b)$ Can you prepare one acidic and one basic solution by using the products formed in the above process? If so,write the chemical equations involved.

While diluting a solution of salt in water,a student by mistake added acetone (boiling point $56\,^oC$). What technique can be employed to get back the acetone? Justify your choice.

Smoke and fog both are aerosols. In what way are they different?

Differentiate between an element and a compound (any two points). Give one example each.

$(a)$ Calculate the mass of potassium chloride required to prepare its $40 \%$ solution in $100 \, g$ of water.$(b)$ Explain the term solubility and the effect of temperature on it.

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Identify which of the following are elements,mixtures,or compounds:
$(i)$ Brass $(ii)$ Diamond $(iii)$ Sand.

On heating,calcium carbonate gets converted into calcium oxide and carbon dioxide.
$(a)$ Is this a physical or a chemical change?
$(b)$ Can you prepare one acidic and one basic solution by using the products formed in the above process? If so,write the chemical equations involved.

$(a)$ Calculate the mass of potassium chloride required to prepare its $40 \%$ solution in $100 \, g$ of water.
$(b)$ Explain the term solubility and the effect of temperature on it.