Chapter 1 Fundamentals of Chemistrty [1]

Which of the following hazard warning labels should be shown on a gas jar containing oxygen?

• 
• 
• 
• 

Which of the following statements about Chemistry are correct?

(1) Chemistry is the study of various substances.

(2) Chemistry is a branch of science.

(3) Chemistry helps provide us with a good standard of living.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3) only

What will be observed if a spoonful of sugar is added to a glass of water and then the mixture is stirred?

• The water becomes white.

• Colourless gas bubbles evolve from the surface of sugar.

• The sugar dissolves.

• The glass becomes cold.

If your finger is accidentally cut by a broken test tube in the laboratory, you should

(1) report to the teacher at once.

(2) clean up the broken glass pieces with a towel. Then dispose of the glass pieces in a rubbish bin.

(3) clean the wound with water and then apply a dressing to it.

• (1) only

• (2) only

• (1) and (3) only

• (2) and (3) only

Which of the following hazard warning labels should be shown on a gas jar containing hydrogen?

• Corrosive

• Explosive

• Flammable

• Toxic

Which of the following are the advantages of microscale experiments?

(1) The result of an experiment can be obtained in a shorter time.

(2) A smaller amount of chemicals can be used.

(3) A smaller amount of wastes would be produced.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

Which of the following actions are used when we make observations in Chemistry?

(1) Seeing with eyes

(2) Feeling with hands

(3) Smelling with nose

(4) Hearing with ears

• (1), (2) and (3) only

• (1), (3), (4) only

• (2), (3), (4) only

• (1), (2), (3) and (4)