A substance
made up of two or more different element is called……
a) molecule
b) mixture
c) compound
d) atom
Which of the following is/are compound?
a) water
b) oxygen
c) carbon
d) all of these
How many elements are present in the compound of water?
a) two
b) three
c) four
d) six
Explanation: 1. Hydrogen and 2. oxygen
A compound is a pure substance made up of two or more different elements joined together chemically in a …….ratio.
a) mixed
b) fixed
c) unit
d) all of these
Carbon dioxide is made up of …….elements?
a) two
b) three
c) four
d) six
Explanation: 1. Carbon and 2. oxygen
Which of the following compound is formed by the reaction of magnesium and oxygen?
a) magnesium oxide
b) sodium chloride
c) dihydrogen monoxide
d) carbon dioxide
