Chemistry - 9 Chapter - 1Chemistry an Introduction Test - 15

Chemistry - 9 Chapter - 1
Chemistry an Introduction Test - 15

1. Define Analytical Chemistry?

a) It is that branch of chemistry, which discusses the analytical methods for getting information about chemical compounds and chemical processes .
b) It is that branch of chemistry, which discusses the industrial methods for getting information about chemical compounds and chemical processes .

2. Define Biochemistry?

a) It is the study of chemical compounds present in plants.
b) It is the study of chemical compounds present in living things.

3. Define Industrial Chemistry?

a) The application of chemical knowledge in technology and industry and the preparation of industrial products is called industrial chemistry.
b) The application of mchenical knowledge in technology and industry and the preparation of industrial products is called industrial chemistry.

4. Define Scientific Method?

a) The method, which helps to collect facts on the basis of observations and predictions. Theories and laws are then formulated to explain these facts.
b) The method, which helps to collect facts on the basis of observations and experiments. Theories and laws are then formulated to explain these facts.

5. Define Observation?

a) The process of observing natural phenomena with the help of six senses and the scientific equipments,
b) The process of observing natural phenomena with the help of five senses and the scientific equipments,

6. Define Inference?
To deduce results from coordinating the observed facts with integrated scientific knowledge is called inference.

a) To reduce results from coordinating the observed facts with integrated scientific knowledge is called inference.
b) To deduce results from coordinating the observed facts with integrated scientific knowledge is called inference.

7. Define Alchemist?

a) A scientist trying to convert cheaper metals in to precious metals is called Al-chemist and this branch of chemistry is called Alchemia.
b) A scientist trying to convert cheaper metals in to precious metals is called Al-chemist and this branch of chemistry is called Alchemy

8. Define Hypothesis?

a) In the light of experiments, the scientists try to explain observations and facts, this tentative explanation is called hypothesis, it is quite possible that after some time, on the basis of new experiments, this hypothesis may be rejected.
b) In the light of experiments, the scientists try to explain observations and facts, this tentative explanation is called hypothesis, it is quite possible that after some time, on the basis of new experiments, this hypothesis may be accepted

9. Define Theory?

a) If the hypothesis is accepted (after discussion and experimentation) is called a theory.
b) If the hypothesis is accepted (after discussion and experimentation) is called a law or principle

10. Define Law?

a) A theory when repeatedly gives different results after experimentation and offers correct explanation of scientific facts, it then becomes a law or principle.
b) A theory when repeatedly gives same results after experimentation and offers correct explanation of scientific facts, it then becomes a law or principle.

11. Define Prediction?

a) The observed facts based on inferences
b) The inference based on observed facts

12. Define Experiment?

a) An experiment is an activity performed under suitable conditions with specially designed instrument to get the required information
b) An experiment is an activity performed under suitable conditions with normally designed instrument to get the desireded results

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