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Chlorine gas, phosgene gas and mustard gas are used as chemical weapons during world war-1.

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Important Questions on Some Basic Concepts of Chemistry

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Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Write some emerging technologies in chemistry that are changing the face of future.
MEDIUM
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry

Find the odd-one-out. Give reasons.

Fertiliser, Soya bean, Insecticide, Pesticide.

EASY
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Write the name of a fertilizer used in agriculture. It is a four-letter word and the word starts with the letter "U".
MEDIUM
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Briefly explain the importance of chemistry in our daily life.
EASY
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
It is possible to conduct experiments to recreate the events that have happened in the past.
EASY
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Our society devotes many useful resources for developing technology and collecting knowledge about our world and also outer space.
MEDIUM
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Describe the importance of chemistry in daily life.
MEDIUM
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

MEDIUM
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry

Find the odd-one-out. Give reasons.

D.D.T., B.H.C., T.N.T.

HARD
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Better homes To increase crop yield.
Health and hygiene Refined oil, vegetable ghee, baby food, etc.
Fertilisers Steel, cement, glass, paints, etc.
Food processing Sulpha drugs, Paracetamol, etc.
Control over diseases Soaps, detergents, cosmetics, etc.
EASY
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Which of the following can be studied under chemistry?
MEDIUM
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Describe and mention one of the example of modern chemistry that we see now, which began during the 16th and the 17th centuries?
MEDIUM
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Write few lines about the Green Revolution.
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Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Safer alternatives to environmentally hazardous refrigerants like CFCs (chlorofluorocarbons), responsible for _____ depletion in the stratosphere, have been successfully synthesised. (Answer in a single word)
EASY
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Why do farmers use fertilizers? Name two important fertilizers.
MEDIUM
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Select the correct sequence for performing a scientific experiment.
MEDIUM
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Why do farmers add fertilizers and manures to the soil in their farms and fields? 
EASY
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Why is ‘necessity' called ‘the mother of invention’?
MEDIUM
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
Write a short note on the Development of Chemistry.
HARD
Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Importance and Scope of Chemistry
What are atomic and hydrogen bombs?