MCQs

Q131: Rate of evaporation of a liquid can be increased by _____?

• A) Increasing humidity
• B) Decreasing temperature
• C) Decreasing atmospheric pressure

Q132: The branch of Chemistry which deals with hydrocarbons ______?

• A) Industrial chemistry
• B) Inorganic chemistry
• C) Organic chemistry

Q133: Which processes involve mitosis?

• A) Growth, reduction division and asexual reproduction
• B) Growth, repair and asexual reproduction
• C) Growth, repair and semiconservative replication

Q134: Root hairs are most important to a plant because they ______?

• A) Store starch
• B) Contain xylem tissues
• C) Increase the surface area for absorption

Q135: Which of these are involved in the clotting of blood?

• A) Platelets
• B) Haemoglobin
• C) Albumin

Q136: The tendency of the object to remain at rest or, if moving, to continue its uniform motion in a straight line is called?

• A) Inertia
• B) Momentum
• C) Friction

Q137: The distance covered by a unit of time is called?

• A) Force
• B) Speed
• C) Momentum

Q138: An example of potential energy would be _____?

• A) A stretching spring
• B) A stone lying at a height
• C) All of these

Q139: The type of lens in our eye is ______?

• A) Convex
• B) Concave
• C) Both a & b

Q140: The ozone layer protects the earth from rays sent by the sun?

• A) Radioactive rays
• B) Ultraviolet rays
• C) Infrared rays