Study Combined Science worksheet for O-Level. Useful for revision, homework, and exam preparation in Zimbabwe.
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This is the O-Level Combined Science worksheet from July 2022. It is a free worksheet for revision.
0 LEVEL COMBINED SCIENCE REVISION TEST
1) a An element has 32 nucleons and 16 protons
iRepresent the element as Y showing its arrangment as per representation of other elements on theperiodic table(1mark)
iishow the electronic configuration of the element Y , hence give its group number (2Marks)
iii suggest a possible charge for the ions of the element Y , giving a reason (2MARK)
2state the 3 particles which makes up the atom, specifying charge, mass \& location of each sub -atomic particle(6marks)
3istate the AVOGADRO' S CONSTANT\& suggestits significance (2Marks)
iifind number of particles in 4grams of oxygen (2marks)
4a) A compound is found to be containing 0,168 grams of Iron \& 0,032 grams of oxygen, find its emperical formular (3marks) *Ar of 0xYGEN=16, of iron=56 *
b) A compound is found to contain $40 \%$ by mass 0 xygen, $2,5 \%$ by mass is hydrogen . The rest of the compound is sodium, find its emperical formular (4marks) $* \mathrm{Ar}$ of $\mathrm{Na}=23$, of $0=16$ \& Of $\mathrm{H}=1 *$
5) state and show a diagram to represent bonding in each of the following
imethane CH4 iicopper metal, Cu iiiCopper (ii) oxide , Cu0 (3marks)
6) two organic compoundzA\&B have the emperical formular C3H6\&C3H8 respectively , iGive correct names to the compounds \&State the functional group of each of the compounds (2marks)
ii state the difference between structures of A\&B (2Marks)
iiigive the formular of the alcohol formed when A is oxisidized (lmark)
7what is an acid and state the pH range for Acids (2marks)
iiNaOH reacted with HNO3 to give water plus a salt
write the balanced equation for the reaction(2marks)
iiistate name of the reaction above and of the salt formed (2marks)
ivgive any 3 differences between an acid and a base(3marks)
8describe steps with aid of relevent chemical equatin for each step for the production ofSULPHIRIC ACID (6MARKS)
iistate name given to the process and the 0ptimum conditions on which the reaction is carried in order to give a maximum yield(3marks)
9state 3 laws of MOTION suggest by Newton in their order from the 1st(6)
b) what is meant by
i velocity iiAcceleration iiidisplacement Ivforce(4marks)
c) a body of mass 2 kg is moving with any acceleration of $10 \mathrm{~m} / \mathrm{s} * 2$, calculate the pressure when this body hits a surface of area $4 \mathrm{~m} * 2$ (3marks)
10 iwhat are base units and suggest the 6 base units and their SI UNITS (7marks)
iiwhat is a vector and give 4 examples of vectors ( 5 marks)
iiia body …