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Chapters
2: Physical and Chemical Changes
▶ 3: Elements, Compounds and Mixtures
4: Atomic Structure
5: Language of Chemistry
6: Metals and Non-metals
7: Air and Atmosphere
![Viraf J. Dalal solutions for New Simplified Middle School Chemistry [English] Class 7 chapter 3 - Elements, Compounds and Mixtures - Shaalaa.com](/images/new-simplified-middle-school-chemistry-english-class-7_6:b84cc9da981046be846d272ceba65ef2.jpg "Viraf J. Dalal solutions for New Simplified Middle School Chemistry [English] Class 7 chapter 3 - Elements, Compounds and Mixtures")
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Solutions for Chapter 3: Elements, Compounds and Mixtures
Below listed, you can find solutions for Chapter 3 of CISCE Viraf J. Dalal for New Simplified Middle School Chemistry [English] Class 7.
Viraf J. Dalal solutions for New Simplified Middle School Chemistry [English] Class 7 3 Elements, Compounds and Mixtures Exercise
Differentiate between the terms elements, compounds, and mixtures with suitable examples.
State which element exists in the highest percentage in earth’s crust.
State which element exists in the highest percentage in atmosphere.
State which element exists in the highest percentage in human body.
Elements are mainly classified into metals and non-metals. State six properties of metals which differ from non-metals.
State the type of element for the following:
potassium
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Potassium
State the type of element for the following:
Carbon
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Carbon
State the type of element for the following:
Oxygen
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Oxygen
State the type of element for the following:
Mercury
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Mercury
State the type of element for the following:
Fluorine
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Fluorine
State the type of element for the following:
Neon
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Neon
State the type of element for the following:
Sulphur
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Sulphur [sulphide]
State the type of element for the following:
Zinc
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Zinc
State the type of element for the following:
Boron
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Boron
State the type of element for the following:
Copper
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Copper
State the type of element for the following:
Calcium
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Calcium
State the type of element for the following:
Xenon
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Xenon
State the type of element for the following:
Arsenic
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Arsenic
State the type of element for the following:
Chlorine
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Chlorine [chloride]
State the type of element for the following:
Silicon
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Silicon
State the type of element for the following:
Lead
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Lead
State the type of element for the following:
Antimony
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Antimony
State the type of element for the following:
Sodium
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Sodium
State the type of element for the following:
Iodine
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Iodine
State the type of element for the following:
Platinum
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Platinum
State the type of element for the following:
Radon
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Radon
State the type of element for the following:
Phosphorus
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Phosphorus
State the type of element for the following:
Bromine
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Bromine [bromide]
State the type of element for the following:
Aluminium
Metal
Non-metal
Metalloid
Noble gas
Give the symbol of the following element:
Aluminium
State what is meant by the term ‘activity series of metals’.
State the most reactive and the least reactive metal from the following – Zn, Ag, Na, Fe, Cu, Pb.
Give three reasons why – carbon dioxide is considered a compound, while carbon – an element.
State what information is provided by the formula of calcium hydroxide – Ca(OH)2
Four atoms of hydrogen combine with one atom of carbon to give methane [CH4]. State the valency of carbon.
Write the radical of the following valency:
Sodium
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Sodium
Write the radical of the following valency:
magnesium
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Magnesium
Write the radical of the following valency:
Chlorine [Chloride]
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Chlorine [chloride]
Write the radical of the following valency:
Nitrate
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Nitrate
Write the radical of the following valency:
Sulphite
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Sulphite
Write the radical of the following valency:
Aluminium
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Aluminium
Write the radical of the following valency:
Oxygen
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Oxygen
Write the radical of the following valency:
Bromine [Bromide]
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Bromine [bromide]
Write the radical of the following valency:
Zinc
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Zinc
Write the radical of the following valency:
Sulphur [Sulphide]
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Sulphur [sulphide]
Write the radical of the following valency:
Sulphate
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Sulphate
Write the radical of the following valency:
Hydroxide
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Hydroxide
Write the radical of the following valency:
Calcium
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Calcium
Write the radical of the following valency:
Carbonate
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Carbonate
Write the radical of the following valency:
Potassium
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Potassium
Write the radical of the following valency:
Phosphate
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Phosphate
Write the radical of the following valency:
Iodine
1+
2+
3+
1−
2−
3−
Give the symbol of the following element:
Iodine
Write the chemical formula of the following:
magnesium oxide
Write the chemical formula of the following:
Sodium bromide
Write the chemical formula of the following:
calcium sulphide
Write the chemical formula of the following:
magnesium sulphate
Write the chemical formula of the following:
aluminium chloride
Write the chemical formula of the following:
zinc oxide
Write the chemical formula of the following:
calcium carbonate
Give the formula of the following acid:
Hydrochloric
Give the formula of the following acid:
Nitric
Give the formula of the following acid:
Sulphuric
Give the formula of the following acid:
Carbonic
Give the formula of the following gas:
Hydrogen chloride
Give the formula of the following gas:
Ammonia
Give the formula of the following gas:
Carbon monoxide
Give the formula of the following gas:
Nitric oxide
Give the formula of the following gas:
Nitrous oxide
Give the formula of the following gas:
Nitrogen dioxide
Give the formula of the following gas:
Nitrogen
Give the formula of the following gas:
Sulphur dioxide
Explain the term mixture.
Differentiate between a homogenous and a heterogeneous mixture with one example of each in the (a) solid-solid (b) solid-liquid If (c) liquid-liquid state of the mixture.
State four differences between – elements, compounds and mixtures with suitable examples.
State the correct technique for the separation of the following mixture.
a sublimable solid and a non-sublimable solid.
State the correct technique for the separation of the following mixture.
a liquid component from soluble impurities in the liquid component.
State the correct technique for the separation of the following mixture.
a lighter liquid from a heavier liquid.
State the correct technique for the separation of the following mixture.
a low boiling point liquid from a high boiling point liquid.
State the correct technique for the separation of the following mixture.
solid constituents in a liquid constituent by adsorption.
Naphthalene and sodium chloride
- Give the principle involved in the separation of the mixture
- Give the technique of separation of the mixture.
Common salt from a solution of common salt in water
- Give the principle involved in the separation of the mixture
- Give the technique of separation of the mixture.
Pure water from impure water
- Give the principle involved in the separation of the mixture
- Give the technique of separation of the mixture.
Kerosene and water
- Give the principle involved in the separation of the mixture
- Give the technique of separation of the mixture.
Methyl alcohol and water
- Give the principle involved in the separation of the mixture
- Give the technique of separation of the mixture.
Dyes of an ink
- Give the principle involved in the separation of the mixture
- Give the technique of separation of the mixture.
Viraf J. Dalal solutions for New Simplified Middle School Chemistry [English] Class 7 3 Elements, Compounds and Mixtures Objective Type Questions
Select the correct answer to the statement given below:
An element present in the earth’s crust, atmosphere and the human body.
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
Select the correct answer to the statement given below:
The chemical name for dinitrogen oxide [N20].
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
Select the correct answer to the statement given below:
A compound containing carbon, oxygen and calcium.
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
Select the correct answer to the statement given below:
A metalloid
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
Select the correct answer to the statement given below:
A non-metal which exists in the liquid state.
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
Select the correct answer from the choice in the bracket.
The least reactive metal.
magnesium
silver
copper
Select the correct answer from the choice in the bracket.
The positively charged particle of an atom.
electron
proton
neturon
Select the correct answer from the choice in the bracket.
The formula of caustic soda.
KOH
Ca(OH)
NaOH
Select the correct answer from the choice in the bracket.
The ideal method to separate iodine and KCI.
sublimation
evaporation
distillation
Select the correct answer from the choice in the bracket.
A homogenous mixture.
brass
dust in air
chalk and water
Match the ideal method of separation of components in a mixture in List I with the appropriate process in List II.
| List I | List II |
| 1. Sand from a mixture of sand and water | A: Separating funnel |
| 2. kerosene from a mixture of kerosene water | B: Sublimation |
| 3. Alcohol from a mixture of methyl alcohol and water | C: Filtration |
| 4. Naphthalene from a mixture of naphthalene and lead chloride | D: Distillation |
| 5. Pure water from impure water | E: Fractional distillation |
Give a reason for the following statement:
If fractional distillation is carried out using a liquid-liquid mixture, one liquid will remain in the flask and the other will be collected in the receiver.
Give a reason for the following statement:
Evaporation of a common salt solution or seawater leaves behind common salt inside the evaporating dish after heating.
Give a reason for the following statement:
Components in a mixture are present in varying proportions and not in a fixed proportion.
Give a reason for the following statement:
Gunpowder is an example of a heterogenous mixture.
Give a reason for the following statement:
In chromatography the absorbent medium e.g. What man filter paper is known as the stationary phase.
Name the following:
The non-sublimable solid from a mixture of iodine and potassium nitrate.
Name the following:
The heavier liquid component from mercury and water.
Name the following:
The lower boiling point component from methyl alcohol and water.
Name the following:
The compound containing one atom of sulphur and two atoms of oxygen.
Name the following:
An acid whose formula is ‘H2CO3’.
Solutions for 3: Elements, Compounds and Mixtures
Viraf J. Dalal solutions for New Simplified Middle School Chemistry [English] Class 7 chapter 3 - Elements, Compounds and Mixtures
Shaalaa.com has the CISCE Mathematics New Simplified Middle School Chemistry [English] Class 7 CISCE solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Viraf J. Dalal solutions for Mathematics New Simplified Middle School Chemistry [English] Class 7 CISCE 3 (Elements, Compounds and Mixtures) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. Viraf J. Dalal textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in New Simplified Middle School Chemistry [English] Class 7 chapter 3 Elements, Compounds and Mixtures are Fractional Distillation Method, Centrifugation Method, Matter (Substance), Natural substances, Separation of Constituents of the Mixtures with More than Two Constituent, Pure Substances, Chromatography Method, Impure Substance, Elements, Types of Element: Metals, Types of Element: Non-metal, Type of Element: Metalloid, Type of Elements: Noble Or Inert Gases, Symbols Used to Represent Atoms of Different Elements, Compound, Mixture, Types of Mixtures, Differences Between Elements, Compounds, and Mixtures, Formation of Mixtures, Separation of Mixtures, Methods of Separation, Winnowing Method, Handpicking Method, Magnetic Separation Method, Gravitation Method, Sublimation Method, Solvent Extraction (Using a Separating Funnel Method), Sedimentation Method, Decantation Method, Filtration Method, Evaporation Method, Crystallisation Method, Simple Distillation Method.
Using Viraf J. Dalal New Simplified Middle School Chemistry [English] Class 7 solutions Elements, Compounds and Mixtures exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Viraf J. Dalal Solutions are essential questions that can be asked in the final exam. Maximum CISCE New Simplified Middle School Chemistry [English] Class 7 students prefer Viraf J. Dalal Textbook Solutions to score more in exams.
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