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