Formative test _Gensci

Which elements are present in the compound aluminium sulfate?

• Ca, Al, S, H

• Al, H, S, O

• Al, H, S, C

• Al, S, Cl,O

Which of the following is a property of metals

• Ductile

• Porous

• Brittle

• Low melting point

The formula for sulfur dioxide is SO2.

a How many different elements are combined in

sulfur dioxide?

What is the word equations for these combustion reactions?

carbon + Oxygen =>______________

Methane completely burns and forms carbon dioxide and water.

The word equation is:

___________+ Oxygen =>Carbon dioxide + _____________

Reaction between Magnesium and Hydrochloric acid gives:
Mg + HCl => _______ (s)+ ________(g)

One of the following is NOT an evidence of chemical reaction.

• heat is produced

• colour change

• precipitate is formed

• mass is decreased

In a chemical reaction, mass is

The periodic table is arranged in increasing

• number of neutrons

• number of protons

• atomic number

• number of electrons

An isotope of an element has

• the same number of electrons, different number of protons

• the same number of neutrons, different number of protons

• the same number of protons, different number of neutrons

• the same number of protons, different number of electrons