Welcome to your Grade 8 General science chapter 3
After carefully reading the following 30 questions, choose the correct answer.
1.
Into which two broad groups are compounds classified based on their sources?
2.
What were organic compounds originally thought to be derived from?
3.
Which element is found in all organic compounds?
4.
What are compounds containing only carbon and hydrogen called?
5.
Which class of hydrocarbons contains only single bonds between carbon atoms?
6.
What is the general formula for alkanes?
7.
What is the name of the alkane with one carbon atom (CH₄)?
8.
Hydrocarbons containing at least one carbon-carbon double bond are called what?
9.
What is the general formula for alkenes?
10.
Which class of hydrocarbons contains at least one carbon-carbon triple bond?
11.
What is the general formula for alkynes?
12.
Into which four categories are inorganic compounds generally classified?
13.
What is a compound consisting of oxygen and one other element?
14.
What are oxides of metals called?
15.
Oxides of non-metals are generally classified as what?
16.
What is the Latin word from which "acid" is derived, meaning sour?
17.
Which of the following is a characteristic property of acids?
18.
What color does blue litmus paper turn when dipped into an acidic solution?
19.
Which substance has a bitter taste and a slippery feel?
20.
What are bases that are soluble in water called?
21.
What is the chemical reaction between an acid and a base called?
22.
What are the two main products of a neutralization reaction between an acid and a base?
23.
Which of these is a common indicator used to test for acids and bases?
24.
Which compound is used in the manufacture of soap and as a laboratory reagent?
26.
Which organic compound is used for preserving biological specimens?
27.
What is the pH of a neutral solution?
28.
Which of the following is an example of an inorganic compound?
29.
What is the color change of red litmus paper in a basic solution?
30.
Which gas is produced when sulfur is burned in air?
