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Recent questions tagged chemistry
+2
votes
1
answer
State the main difference between an endothermic reaction and an exothermic reaction.
asked
Apr 5, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
cbse
+1
vote
1
answer
In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal:
asked
Apr 2, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
+2
votes
1
answer
Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.
asked
Mar 31, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
+2
votes
1
answer
What changes do you observe in the iron nails and colour of copper sulphate solution,
asked
Mar 29, 2019
in
Chemistry
by
kratos
chemistry
cbse
acids bases and salts
class-10
chemical reactions and equations
+1
vote
1
answer
(a) What is the colour of ferrous sulphate crystals ? How does this colour change after
asked
Mar 26, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
+1
vote
1
answer
What are Arrhenius parameters?
asked
Mar 15, 2019
in
Chemistry
by
kratos
chemistry
arrhenius
jee
class-12
chemical kinetics
+3
votes
1
answer
Why should magnesium ribbon be cleaned before burning in air ?
asked
Mar 14, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
+2
votes
1
answer
Identify the reducing agent in the following reactions.
asked
Mar 13, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
+2
votes
1
answer
Write the balanced chemical equation for the following and identify the type of reaction in each case.
asked
Mar 13, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
cbse
+2
votes
1
answer
Name: (a) a nitrate of metal which on heating does not give nitrogen dioxide
asked
Mar 12, 2019
in
Chemistry
by
kratos
chemistry
nitric acid
class-10
icse
study of compounds
+2
votes
1
answer
Why do we store silver chloride in dark ******** bottles.
asked
Mar 11, 2019
in
Chemistry
by
kratos
chemistry
cbse
chemical reaction and catalyst
class-10
chemical reactions and equations
+2
votes
1
answer
Which among the following changes are exothermic or endothermic in nature? (a) Decomposition of ferrous sulphate
asked
Mar 7, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
+2
votes
1
answer
Account for the 'Oil and *** containing food items are flushed with nitrogen'.
asked
Mar 6, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
+2
votes
1
answer
What is a balanced chemical equation ? Why should chemical equation be balanced ?
asked
Feb 26, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
+2
votes
1
answer
896 mL vapour of a hydrocarbon ‘A’ having carbon 87.80% and hydrogen 12.19% weighs 3.28g at STP. Hydrogenation of ‘A’ gives 2-methylpentane.
asked
Feb 25, 2019
in
Chemistry
by
kratos
some basic concepts of chemistry
chemistry
stoichiometry in physical chemistry
class-11
jee
hydrocarbons
jee mains
chemical reactions and equations
+1
vote
1
answer
Name the oxidising and reducing agent in the following reaction:
asked
Feb 24, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
+2
votes
1
answer
Why are decomposition reaction called the opposite of combination reactions? Write equations for these reactions.
asked
Feb 24, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
+1
vote
1
answer
In the following case pKa is maximum when R is
asked
Feb 19, 2019
in
Chemistry
by
kratos
organic chemistry
chemistry
cbse
arrhenius
jee
g.o.c
chemical reactions and equations
class-12
chemical kinetics
+3
votes
1
answer
State the main difference between an endothermic reaction and an exothermic reaction,
asked
Feb 18, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
+2
votes
1
answer
Ferrous sulphate decomposes with the evolution of a gas having a characteristic odour of burning
asked
Feb 15, 2019
in
Chemistry
by
kratos
chemical reactions and equations
chemistry
class-10
cbse
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