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Recent questions tagged chemical reactions
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What is Neutralization reaction?
asked
Apr 5, 2019
in
Class 10
by
kratos
acids
cbse
class-8
acids and bases
chemical reactions
class-9
class-10
chemical reactions and equations
bases and salts
+2
votes
1
answer
(a) Define a chemical reaction. (b) What happens during a chemical reaction ?
asked
Apr 3, 2019
by
kratos
class-8
chemical reactions
+1
vote
1
answer
Which of the following is a reducing agent? 1. oxygen 2. chlorine
asked
Mar 28, 2019
by
kratos
class-8
icse
chemical reactions
+1
vote
1
answer
Which of the following are physical changes? (i) Melting of iron metal (ii) Rusting of iron (iii) Bending of an iron rod
asked
Mar 22, 2019
in
Class 10
by
kratos
changes around us
class-8
cbse
matter around us pure
chemical reactions
class-7
class-10
chemical reactions and equations
+3
votes
1
answer
Fractional distillation is suitable for separation of miscible liquids with a boiling point difference of about 25 K or less.
asked
Mar 20, 2019
in
Chemistry
by
kratos
organic chemistry
cbse
class-8
matter around us pure
class-11
chemical reactions
some basic principles and techniques
icse
+1
vote
1
answer
Give reason: (a) A person suffering from acidity is advised to take an antacid.
asked
Mar 18, 2019
in
Chemistry
by
kratos
chemistry in everyday life
neet
solutions
class-8
class-11
chemical reactions
neural control and coordination
class-12
+2
votes
1
answer
What do you observe when (a) dilute sulphuric acid is added to granulated zinc?
asked
Mar 16, 2019
in
Chemistry
by
kratos
some basic concepts of chemistry
cbse
class-8
class-11
chemical reactions
hydrogen
chemical reaction and catalyst
class-10
icse
+2
votes
1
answer
What is meant by chemical combination? Give an example.
asked
Mar 8, 2019
in
Class 10
by
kratos
class-8
ncert class 10 science
icse
chemical reactions
+2
votes
1
answer
The reaction A + B → products is first order in each of the reactants.
asked
Mar 7, 2019
in
JEE
by
kratos
half life of reaction
cbse
class-8
order of reactions
jee
chemical reactions
icse
jee mains
class-12
chemical kinetics
+1
vote
1
answer
Complete the following (i) B + O2 → (ii) B + N2 → (iii) B + Cl2 →
asked
Mar 6, 2019
in
Class 11
by
kratos
class-8
class-11
chemical reactions
hydrogen
icse
p-block element
+1
vote
1
answer
Classify the’following into chemical and physical changes. 1. Rusting of iron 2. Ripening of fruits 3. Magnetizing a steel plate
asked
Mar 3, 2019
by
kratos
changes around us
class-8
cbse
matter around us pure
chemical reactions
class-6
+3
votes
1
answer
2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed,
asked
Feb 22, 2019
in
Class 10
by
kratos
acids
cbse
class-8
nitric acid
chemical reactions
chemical reaction and catalyst
class-9
class-10
icse
ammonia
bases and salts
+1
vote
1
answer
Give an example of simple for chemical reactions.
asked
Feb 11, 2019
by
kratos
class-8
chemical reactions
+2
votes
1
answer
What is valence electron?
asked
Feb 7, 2019
in
Class 11
by
kratos
class-8
class-11
chemical reactions
+2
votes
1
answer
A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid.
asked
Feb 4, 2019
in
Class 10
by
kratos
cbse
class-8
chemical reactions
class-10
carbon and its compounds
+2
votes
1
answer
State the effect of: (a) an endothermic reaction
asked
Feb 4, 2019
by
kratos
class-8
icse
chemical reactions
+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
+1
vote
1
answer
Write two observations that you will make when an iron nail is kept in an aqueous solution of copper sulphate.
asked
Jan 29, 2019
in
Class 10
by
kratos
metals and nonmetals
class-8
chemical reactions
class-10
icse
chemical reactions and equations
+3
votes
1
answer
How is a strong electrolyte different from a weak electrolyte?
asked
Jan 29, 2019
in
Class 12
by
kratos
class-8
class-11
chemical reactions
class-9
class-10
icse
ionic equilibrium
chemical bond and chemical equation
equilibrium
class-12
+1
vote
1
answer
Which of the following is not a physical change? (A) Boiling of water to give water vapour (B) Melting of ice to give water
asked
Jan 26, 2019
in
Class 10
by
kratos
physical
cbse
class-8
chemical reactions
class-10
icse
class-7
chemical changes
chemical reactions and equations
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