Question : The surface tension of water on adding detergent to it:

Option 1: increases

Option 2: decreases

Option 3: no change

Option 4: becomes zero

Question : Metal tea pots have wooden handles because:

Option 1: wood is bad conductor of heat

Option 2: it prevents electric shock

Option 3: it gives beauty to the pots

Option 4: it is hygenic

Question : Organic food is supposed to be better for human consumption because

Option 1: It is grown in a glass house and air-tight environment.

Option 2: It is grown without the use of chemicals and synthetic pesticides.

Option 3: It depends on chemicals and fertilizers.

Option 4: It is too expensive to buy.

Question : Which of the following statements is correct regarding the production possibility frontier?

I. It gives the combinations between two goods that can be produced when the resources of the economy are fully utilised.

II. It illustrates the production possibilities of the economy.

Option 1: Only I

Option 2: Only II

Option 3: Both I and II

Option 4: Neither I nor II

Question : What is the position of the circumcenter of an obtuse-angled triangle?

Option 1: It lies inside the triangle.

Option 2: It lies outside the triangle.

Option 3: It is the mid-point of the largest side.

Option 4: It is the vertex opposite to the largest side.