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Recent questions tagged physical and chemical changes
+1
vote
1
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Fill in the blanks in the following statements using the words given in the box.
asked
Apr 3, 2019
in
Physics
by
kratos
physical and chemical changes
class-7
+2
votes
1
answer
During electrolysis of water a few drops of sulphuric acid is added into water. Why?
asked
Mar 31, 2019
in
Class 10
by
kratos
cbse
class-10
class-7
carbon and its compounds
chemical reactions and equations
physical and chemical changes
+3
votes
1
answer
. Concentrated sugar syrup made by dissolving sugar in hot water is allowed to cool what do you observe what type of change is it
asked
Mar 18, 2019
in
Class 12
by
kratos
neet
solutions
cbse
thermal properties of matter
matter around us pure
class-11
aiims
thermodynamics
class-7
physical and chemical changes
+2
votes
1
answer
Give an example of a chemical reaction for each of the following situations:
asked
Mar 16, 2019
in
Physics
by
kratos
physical and chemical changes
class-7
+3
votes
1
answer
Which of the following is a physical change?
asked
Mar 9, 2019
in
Physics
by
kratos
physical and chemical changes
class-7
+3
votes
1
answer
When a candle burns, both physical and chemical changes take place. Identify these changes.
asked
Mar 8, 2019
in
Physics
by
kratos
physical
cbse
class-7
chemical changes
physical and chemical changes
+1
vote
1
answer
Explain why rusting of iron objects is faster in coastal areas than in deserts.
asked
Feb 21, 2019
in
Physics
by
kratos
chemical changes
physical and chemical changes
class-7
physical
+1
vote
1
answer
Is galvanisation the process of electroplating?
asked
Feb 7, 2019
in
Class 12
by
kratos
metals and nonmetals
class-8
class-7
class-10
metals and non-metals
physical and chemical changes
class-12
metallurgy
+2
votes
1
answer
Explain the following:(a) Lime water turns milky on passing carbon dioxide gas into it.
asked
Feb 2, 2019
in
Class 11
by
kratos
changes around us
class-8
class-11
chemical reactions
class-7
physical and chemical changes
+2
votes
1
answer
A chemical change may involve –
asked
Jan 24, 2019
in
Physics
by
kratos
physical and chemical changes
class-7
+1
vote
1
answer
Who commenced the construction of Qutub Minar at Delhi?
asked
Jan 14, 2019
in
Class 12
by
kratos
medieval india
class-7
icse
physical and chemical changes
class-12
the delhi sultanate
the sultans of delhi
+2
votes
1
answer
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
asked
Jan 3, 2019
in
Class 10
by
kratos
materials
class-8
class-7
class-10
metals and non-metals
chemical reactions and equations
physical and chemical changes
+2
votes
1
answer
Why is combustion of Liquified Petroleum Gas (LPG) a chemical change?
asked
Jan 1, 2019
in
JEE
by
kratos
physical
jee
class-9
class-7
matter around us
jee mains
chemical changes
physical and chemical changes
class-12
states of matter
+2
votes
1
answer
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of
asked
Dec 28, 2018
in
Class 10
by
kratos
chemical effect of electric current
class-8
class-7
icse
class-10
physical and chemical changes
+1
vote
1
answer
When baking soda is mixed with lemon juice, hubbies are formed with the evolution of a gas.
asked
Dec 24, 2018
in
Physics
by
kratos
physical
physical and chemical changes
chemical changes
class-7
icse
+3
votes
1
answer
What kind of change is shown by tearing of paper?
asked
Dec 21, 2018
in
Physics
by
kratos
physical and chemical changes
physical and chemical changes of substances
class-7
+1
vote
1
answer
Explain how painting of an iron gate prevents it from rusting.
asked
Dec 8, 2018
in
Physics
by
kratos
physical
changes around us
class-7
chemical changes
physical and chemical changes
+1
vote
1
answer
State whether the following statements are true or false:
asked
Nov 29, 2018
in
Physics
by
kratos
physical and chemical changes
class-7
+1
vote
1
answer
An LPG (liquified petroleum gas) cylinder weighs 14.8 kg when empty. When full it weighs 29.0 kg and shows a pressure
asked
Nov 15, 2018
in
Class 11
by
kratos
class- 11
physical
class-7
chemical changes
chemical reactions and equations
physical and chemical changes
states of matter
+2
votes
1
answer
Match the items of Column I with the items of Column II.
asked
Oct 26, 2018
in
Physics
by
kratos
physical and chemical changes
class-7
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