Selina solutions for Concise Chemistry [English] Class 6 ICSE chapter 1 - Introduction to Chemistry [Latest edition]

Give two examples of the following substance.

Food preservatives

Give two examples of the following substance.

Fuel

Give two examples of the following substance.

Fungicides

Give two examples of the following substance.

Medicines

Give two examples of the following substance.

 Building materials

Give two examples of the following substance.

Chemical war weapons 

What is science?

What is chemistry?

How is chemistry helpful in improving the health of human beings?

What is alchemy?

 What kind of experiments did Alchemists do?

 What is ‘Philosopher’s stone’?

What is the main difference between alchemy and chemistry?

Name the chemicals which help in increasing food production.

Name six such products, which we use daily.

How is the knowledge of chemistry important to mankind?

What is the contribution of chemistry in following field?

Industry

What is the contribution of chemistry in following field?

Clothing

What is the contribution of chemistry in following field?

Cosmetics

What is the contribution of chemistry in the following field?

National Defence

What is the contribution of chemistry in following field?

Medicines

Who is known as the Father of chemistry? Why?

Name the scientists who discovered the following:

Atoms

Name the scientists who discovered the following:

Oxygen

Name the scientists who discovered the following:

Safety lamp

Name the scientists who discovered the following:

Elements

___________ deals with the study of matter and the changes it undergoes.

_____________ help to increase the production of food.

Food items like jams and pickles are protected by using ___________.

Fill in the blank:

L.P.G. is used for ___________

Fill in the blank:

Inert gases were discovered by  ___________

Match the following words in column A with those in column B:

Write True or False against the following statement.

Chemistry plays an important role in the national economy:

Write True or False against the following statement.

Antibiotics are used as preservatives:

Write True or False against the following statement.

D.D.T. is an important fertiliser:

Write True or False against the following statement.

Gunpowder is an insecticide:

Write True or False against the following statement.

Enzymes secreted by our body are chemicals:

Choose the correct alternative from the choices given below for the following statement:

Trinitrotoluene is used as

Choose the correct alternative from the choices given below for the following statement:

Which one of the following is a pesticide?

Choose the correct alternative from the choices given below for the following statement:

Mortar is used as a

Choose the correct alternative from the choices given below for the following statement:

Used is an important

Choose the correct alternative from the choices given below for the following statement:

 The chemicals prescribed by a doctor in the treatment of infectious diseases are called

Match the following scientists in column A with their discoveries or contributions in column B.

State what is Science and give the basic bifurcation of Science with reasons.

Give the basic difference between Inorganic Chemistry and Organic Chemistry.

State the functions of the following basic glass apparatus:

Glass test tube

State the functions of the following basic glass apparatus:

Hard glass boiling tube

State the functions of the following basic glass apparatus:

Beaker

State the functions of the following basic glass apparatus:

Round bottom flask

State the functions of the following basic glass apparatus:

Retort

State why a round bottom flask is preferred to a flat bottom flask – during the preparation of gases in the laboratory.

State the function of

The wooden handle at the end of the test tube holder.

State the function of

The asbestos fixed at the center of the wire gauze.

State the function of

The clamp mounted on the rod of a retort stand

State the function of

The air regulator in a Bunsen burner.

State the function of The tap at the base of a burette.

State the method used for collecting the following gas:
Oxygen – a gas slightly soluble in water.

State the method used for collecting the following gas-
Ammonia – a gas highly soluble in water and lighter than air

State the method used for collecting the following gas:
Sulphur dioxide – a gas highly soluble in water and heavier than air

Explain in brief the importance of Chemistry in agriculture.

Explain in brief the importance of Chemistry in the production of various products.

‘Alchemists are older words for Chemists’. Discuss the statement in brief.

In the medieval ages – the philosopher’s stone was connected with all transformations. Explain.

State the contributions of Dimitri Mendeleev

State the contributions of Antoine Lavoisier

State the contributions of John Dalton – towards the development of Chemistry.

Differentiate between the terms food preservatives and food processing with appropriate examples.

Explain the term ‘cosmetics’ ‘talc’. Name a few main ingredients in cosmetics the role they play.

Differentiate between natural fibres & synthetic fibres.

State what is Terylene.

State some characteristic properties of Terylene which make it suitable for commercial use.

Explain how medicines are a boon to mankind. State the positive & negative effects of medicines like aspirin and paracetamol.

Give a comparative difference between soaps and detergents. Give a reason. why detergents have an advantage over soap.

State what are – ‘stain removals’. Name three important stain removers & give their prime functions.

Select the correct name from the choices given below for the following case.

The branch of Science which deals with the different forms of energy e.g. light and sound.

Select the correct name from the choices given below for the following case.

The branch of Chemistry which includes a study of specific carbon compounds – built up mainly carbon and hydrogen.

Select the correct name from the choices given below for the following case.

The scientist who formulated the Periodic Table.

Select the correct name from the choices given below for the following case.

Predecessors to the modern Chemist who created the ‘Philosopher's stone’.

Select the correct name from the choices given below for the following case.

A synthetic fiber used in clothing.

Select the correct name from the choices given below for the following case.

A Medicine to treat pain, fever & inflammation.

Select the correct name from the choices given below for the following case.

A water-soluble cleaning agent – not inactivated by hard water.

Select the correct name from the choices given below for the following case.

A substance which absorbs moisture and keeps the skin dry and free from rashes.

Select the correct name from the choices given below for the following case.

A chemical used as a preservative for jams, pickles, etc.

Select the correct name from the choices given below for the following case.

A substance which dissolves grease & oil and is preferred as a – drain cleaner.

Match the apparatus A to J shown below with their correct names 1 to 10 given below:

1. Delivery Tube
2. Pipette
3. Wire gauze
4. Bee-hive shelf
5. Thistle funnel
6. Flat bottom flask
7. Test tube stand
8. Burette
9. Retort
10. Conical flask

Select the correct apparatus from A, B, or C for the following functions of the apparatus given.

For gas preparations where heating is required.

Select the correct apparatus from A, B, or C for the following functions of the apparatus given.

For holding washed test tubes

Select the correct apparatus from A, B, or C for the following functions of the apparatus given.

A glass apparatus resistant to chemicals, made of pyrex, and used for heating specific liquids.

Select the correct apparatus from A, B, or C for the following functions of the apparatus given.

A metallic apparatus which supports the wire gauze.

Select the correct apparatus from A, B, or C for the following functions of the apparatus given.

A long glass apparatus closed at one end used for collecting gases.

Select the correct apparatus from A, B, or C for the following functions of the apparatus given.

A glass apparatus that measures liquid by sucking the liquid at one end up to the marked level and later pouring it out.

Select the correct apparatus from A, B, or C for the following functions of the apparatus given.

A long glass tube with a broad inlet at the top, which allows entry of the reactants into the round bottom flask, during laboratory preparations of gases.

Select the correct apparatus from A, B, or C for the following functions of the apparatus given.

A modern apparatus with an air regulator, used for heating purposes.

Select the correct apparatus from A, B, or C for the following functions of the apparatus given.

A modern apparatus with an air regulator, used for heating purposes.

Select the correct apparatus from A, B, or C for the following functions of the apparatus given.

A rectangular mesh with asbestos at its centre kept for initiating even distribution of heat to the bottom of the apparatus.

Give reasons for the following

Alchemy was considered a pseudoscience.

Preservatives are added to food or beverages.

Give reasons for the following

Titanium dioxide is an important ingredient in cosmetics.

Give reasons for the following

Aspirin is one of the most widely used medications – globally.

Give reasons for the following

Ordinary soap is wasted in hard water.

A philosopher’s stone is not exactly a stone.

Food processing is an important procedure for obtaining marketable food products.

Give reasons for the following

Cosmetics may contain preservatives, as one of their ingredients.

Give reasons for the following

Polyester is added to natural fiber cotton, to give terylene.

Give reasons for the following

All medicines must be taken under proper doctors' supervision and in the correct dose.