Checked by:_______________ Rechecked by:_____________ Sign Invigilator:_____________
Q1. Circle the correct answer. (15)
1.Which one of the following is not an amorphous solid?
a) Rubber b) Plastic c) Glass d) Glucose
2.Empirical formula of benzene is_____
a) CH4 b) CH c) C6H6 d) None of them
3.Boiling point of Acetic Acid is:
a) 110 °C b) 118 °C c) 130 °C d) 140 °C
4.Which one of the following does not effect the boiling point?
a) Intermolecular forces b) External pressure c) Intial tempreature of the liquid d) Nature of liquid
5._________phosphorus is less reactive.
a) Blue b) Pink c) Red d) White
6.Evaporation is an.
a) Exothermic process b) Endothermic process c) Continuous process d) Both b and c
7.Density of a gas increases when:
a) Temperature of gasincreasesb) Pressure increase
c) Volume is kept constant d) Volume increase
8.Normal body temperature is _________
a) 88.6°F b) 89.6°F c) 98.6°F d) 98.6°F
9.When one mole of water in liquid state is converted into vapour form, it requires _______amount of energy
a) 20.9kj/mol b) 30.8 kj/mol c) 40.7 kj/mol d) 40.8 kj/mol
10.Matter exist in __________ physical states.
a) One b) Two c) Three d) Four
Q2. Write short answers to these questions: (15)
1.What is the main cause in raising of blood pressure.
2.Define diffusion and give example.
3.What is the difference between evaporation and vapoure pressure.
4.What do you know about Robert Boyle?
5.Write the name of those factors which effect to evaporation.