chemistry exercises

1. Determine the ionization reaction result of  Na₂CO₃

a. Na²⁺ and CO₃^2-

b. Na²⁺ and CO₃^-

c. 2Na⁺ and CO₃^2-.

d. Na²⁺ and CO₃^2-

e. Na⁺ and 2CO₃^2-

2. Which one among these substances that its solution cannot conduct electricity in water ?

a. Vinegar acid

b. Table salt

c. Sea water

d. Nitrate acid

e. Sugar..

3. Identified which reaction are non redox from these reaction ..

_A. N_2` + 3H₂  2NH₃

_B. 2H₂ + O₂  2H₂O

_C. S + O₂  SO₂

_D. Ni + HCl  NiCl + H₂O

E. SO₃ + H₂O  H₂SO₄.,.

4.A redox reaction is shown by ..

a.Cu²⁺ + 2e^-Cu

b.Cl₂ + 2e^-  2Cl^-

c.2KClO₃  2KCl + 3O₂

d.Fe²⁺  Fe³⁺ + e

e.CuO + H₂  Cu + H₂O

5. Carbon atom can form as many as ... With other carbon atoms

a.three ionic bonds

b.Four ionic bonds

c.Five ionic bonds

d.Four kovalent bonds

e.Five covalent bonds

6. Hydrocarbon with formula of C₅H₈ can be classificasied into homolog series of

A. Alkene

B. Alkadiane

C. Cycloalkane

D. Alkyne

E. B and C are the correct answer

7. The following phenomenon that appears at petroleum and natural gas materialization is ..

A.stones cracking

B.Innorganic lime stones moldering

C.Organic compounds moldering

D.Sea water evaporating residue

E.Compounds moldering

8. Primary component in petroleum `is ..

a.Cycloalkane group

b.Straight chain alkane group

c.Branched chain alkane group

d.Aromatic group

e.Alkene group