GEMS MODERN ACADEMY

TERM 1

REVISION

TIME : 45 min

Q1

1. State two differences between elements and compounds. [2]2. Give the Latin names for Tin and Copper. [2]3. State the electronic configuration of :- H,Ne,Ca. [3]4. Define the term isotopes.Why do they differ from the physical properties?

[3]

Q2

Mg + O MgO1. Correct the equation.Identify the reactants and products. [2]2. What do the following mean in a reaction [2]

a. ∆

b. (aq.)3. An element ‘X’ has 2 electrons in it’s valence,it is non reactive. [3]

a. Write it’s symbolb. Write the element.c. Name a another element which is non reactive

4. An element ‘A’ has 4 electrons.It has a mass number of 9 .Find : -a. Atomic numberb. Mass no.c. State it’s electronic configuration [3]

Q3

1. State the use of the test tube and conical flask? [2]2. Why is there a need for the Wire gauze ? [2]3. Which instrument is used to handle tiny objects?Name any two other lab

apparatus. [3]

4. If you would like to burn a magnesium ribbon,what apparatus would you need.Justify your statement.Write a balanced equation for the same.[3]

Q4

Na + Cl2 NaCl1. State the law of conservation of mass/matter [2]2. Is the above correct according to this law?Why/Why not? [2]3. Correct the above equation.Identify the reactants and products.[3]4. Balanced equations

a. Why?b. How?c. Example? [3]