Chemical Reactions:
A chemical reaction is a process that leads to the
chemical transformation of one set of chemical substances to another.
When you light
up a match stick, which of the following is/are produced?
a) CO2
b)
water
c)
ash
d) all of these
Conversion of match stick into CO2, water and ash is……..reaction.
a) physical
b) biological
c) chemical
d) all of these
A chemical change referred as a …….reaction.
a) physical
b) biological
c) chemical
d) all of these
What are formed when chemical reaction occurs?
a) new substances
b) old substances
c) new mixtures
d) old mixtures
Conversion of
substance into new substance is called……..reaction
a) physical
b) biological
c) chemical
d) all of these
