Compounds and Mixtures

IMPORTANT

Compounds and Mixtures: Overview

This Topic covers sub-topics such as Solution, Compounds, Mixtures, Suspension, Molecule, Molecular Mass, Filtration, Solvent, Fractional Distillation, Filter Paper, Solute, Residue, Difference between Mixtures and Compounds and, Immiscible Liquids

Important Questions on Compounds and Mixtures

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 1

The _____ is the solid obtained after filtration.

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 2

Write the chemical formula of magnesium chloride. Also mention the cation and anion in magnesium chloride.

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 3

Give an example of a mixture containing two immiscible liquids. Suggest a suitable method to separate the components of this mixture.

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 4

Define immiscible liquids.

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 5

What is meant by miscible liquids?

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 6

Which of the following processes can be useful in separating the tea leaves from tea?

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 7

A mixture of sand, salt and water can be separated by using which of the following processes?

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 8

Hydrogen is an important gas that is used for many chemical processes. It is often obtained by reacting methane $({CH}_{4})$ with steam in the following reaction.

${CH}_{4} + H_{2} O \to CO + 3 H_{2}$

Using the periodic table, calculate the relative formula mass of the methane and water.

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 9

Water that flows through rivers may have compounds dissolved in it that make it unsafe to drink. Which technique could be used to remove the dissolved substances and obtain pure water?

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 10

Calcium nitrate and potassium sulphate are both used as fertilisers. If too much of them are used, then they can pollute the environment. Which statement about these two substances is true?

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 11

Chlorofluorocarbons (or CFCs) are chemicals that destroy the ozone in the atmosphere. A common CFC has a chemical formula ${CCl}_{2} F_{2}$ . Using the table below, what is the relative formula mass of ${CCl}_{2} F_{2}$ ?

Chemical symbol	Element	Relative atomic mass
$C$	Carbon	$12$
$Cl$	Chlorine	$35.5$
$F$	Fluorine	$19$

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 12

Ozone is an important constituent of the stratosphere as it blocks harmful UV rays from the Sun. Ozone has the chemical formula $O_{3}$ . Which word describes ozone?

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 13

The atmosphere mainly consists of nitrogen and oxygen. Which term describes the combination of gases in the atmosphere?

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 14

Identify the name and find the relative formula mass of the following compound:

${MgCO}_{3}$

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physical and earth science>Atoms, Elements and Compounds>Compounds and Mixtures> Q 15