CG Board Class 6 Science Changes Around Us MCQ
If you are looking for CG Board Class 6 Science Changes Around Us MCQ then you are at right place.
In the conversion of water to steam and back to water, this type of change is called:
a) Irreversible change
b) Chemical change
c) Reversible change
d) Permanent change
Answer: c) Reversible change
Which of the following is a periodic (cyclic) change?
a) Falling of fruits from trees
b) Railway accidents
c) Change of seasons
d) Cyclones
Answer: c) Change of seasons
Rusting of iron is an example of:
a) Physical change only
b) Chemical change only
c) Both physical and chemical change
d) Neither physical nor chemical change
Answer: b) Chemical change only
Which of the following is NOT a characteristic of chemical changes?
a) New products are formed
b) Original substance can always be recovered
c) Chemical reactions occur between reactants
d) Most chemical changes are irreversible
Answer: b) Original substance can always be recovered
The process of pasteurization was first used by:
a) Thomas Edison
b) Louis Pasteur
c) Marie Curie
d) Alexander Fleming
Answer: b) Louis Pasteur
Which of the following is a desirable change?
a) Flooding of rivers
b) Formation of manure from cow-dung
c) Breaking of glass plate
d) Rusting of machine parts
Answer: b) Formation of manure from cow-dung
In a physical change:
a) New substance is formed
b) The change is always irreversible
c) No new substance is formed
d) Chemical properties are changed
Answer: c) No new substance is formed
The fermentation process is:
a) A physical change
b) A chemical change
c) Neither physical nor chemical
d) Both physical and chemical
Answer: b) A chemical change
The change of state from ice to water vapor involves:
a) Only chemical change
b) Only physical change
c) Both chemical and physical change
d) Neither chemical nor physical change
Answer: b) Only physical change
During fermentation, complex carbon compounds break down into:
a) More complex compounds
b) Simpler compounds
c) Same compounds
d) No breakdown occurs
Answer: b) Simpler compounds
In chemical reactions:
a) Only heat is absorbed
b) Only heat is released
c) Either heat is absorbed or released
d) No heat exchange takes place
Answer: c) Either heat is absorbed or released
