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Chemistry Class 11: Basic Concepts

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Questions and Answers

How has chemistry impacted agriculture and food production?

By providing mechanical equipment for farming

By providing chemical fertilizers and insecticides (correct)

By introducing solar-powered irrigation systems

By developing new plant species through genetic engineering

Which of the following is an example of a life-saving drug mentioned in the text?

Chlorine

Phenol

Calcium phosphate

Penicillin (correct)

What is the purpose of disinfectants like phenol in health and sanitation?

To kill micro-organisms in drains and toilets (correct)

To clean drinking water

To preserve fruits and vegetables

To neutralize acidic spills

How does chemistry contribute to saving the environment according to the text?

By reducing global warming through carbon capture technology Signup and view all the answers

Which compound is used for sterilization of water in very low concentrations for drinking purposes?

Chlorine Signup and view all the answers

Which type of matter has neither definite volume nor definite shape?

Gases Signup and view all the answers

What is the main characteristic of solids?

Definite volume and definite shape Signup and view all the answers

Which physical state of matter has particles that are far apart and move easily and fast?

Gases Signup and view all the answers

What is Chemistry's role in developing industrially manufactured products like fertilizers and metals?

It plays an important role in developing such products Signup and view all the answers

What is a substitute for petrol that is effective in reducing pollution caused by automobiles?

CNG (Compressed Natural Gas) Signup and view all the answers