Class: SS1 Time: 1 hour 30min Subject: Chemistry
- ____ contains two or more different substances
- _______ is used to separate solid particles of different sizes
- A mixture whose constituents differs in colour, size or shape could be separated using the sense of _______
- When a mixture contains magnetic and non magnetic substances, the process of separation is called________________
- When crystals obtained are not pure the process is repeated until the desired level of purity is attained, this latter process is known as ____
- According to Boyle’s law, volume of a ______ increases as the ___ decreases and vice versa
- It is simply stated that, for a fixed mass of gas under any set of condition of V.P and I to the value of ___ much remain constant
- In ideal gas equation, four quantities are important to the experimental work. They are _____, _____, ______ and ______
- How many atoms are there in 4.0g of carbon (c=12)
- The two classes of acid are ______ and ________
Section B; answer 4 questions only
- (a) What is an acid(b) List ten organic acids
- (a) What is chemistry
(b) List and explain 5 uses of chemistry in our daily life
- (a) Define homogeneous mixture(b) What is fractional distillation?
- (a) Define chromatography(b) State Boyle’s law
- (a) 885cm3 of gas have a pressure of 485cm3 Find its volume, if the pressure is reduced to 750 mmHg
(b) State Dalton’s law of partial pressures
- (a) State Avogadro’s law
(b) Define hydroscopic substance
