Q261: What is the name of common salt ?
Q262: Which type of cells protect the body from infectious diseases and foreign invaders?
Q263: Which of the following is a man-made substance?
Q264: Sunlight is a good source of vitamin ____?
Q265: Which poisonous gas is produced when coal is burnt without enough air supply?
Q266: Ozone present in the ozone layer of the atmosphere is important because
Q267: It is difficult to cook on mountains because of?
Q268: According to fundamental rights no child below the age of ____ shall be engaged in any factory, mine or any other hazardous employment.
Q269: Minimum age limit to contest for MNA in Pakistan is:
Q270: Which of following not among the fundamental rights of citizens ?