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Recent questions tagged language of chemistry
+3
votes
1
answer
Write ‘true’ or ‘false’ for the following statements : (a) No new substance is formed during a chemical reaction
asked
Apr 5, 2019
in
Chemistry
by
kratos
language of chemistry
class-7
icse
class-8
+2
votes
1
answer
What is variable valency ? Give two examples of elements showing variable valency.
asked
Mar 21, 2019
in
Chemistry
by
kratos
language of chemistry
class-7
icse
class-8
+1
vote
1
answer
What information do you get from the equation HE+Cl2=2HCl
asked
Mar 20, 2019
in
Chemistry
by
kratos
class-8
class-11
language of chemistry
class-7
icse
redox reactions
class-12
+2
votes
1
answer
Write your observations for the following chemical reactions and name the products formed : (a) When sugar is heated.
asked
Mar 10, 2019
in
Chemistry
by
kratos
language of chemistry
class-7
icse
class-8
+2
votes
1
answer
The valency of calcium is 2. Write the valencies of other ******* in the following :
asked
Feb 28, 2019
in
Chemistry
by
kratos
class-8
molecules
language of chemistry
class-9
class-7
icse
atomic structure
chemical bond and chemical equation
atoms
+1
vote
1
answer
Write word equation for KClO3
asked
Feb 11, 2019
in
Chemistry
by
kratos
some basic concepts of chemistry
class-11
jee
language of chemistry
class-7
icse
class-10
jee mains
gaseous state
chemical reactions and equations
p-block element
+2
votes
1
answer
Copper carbonate when heated, it turns : (a) Blue (b) Green (c) *****
asked
Jan 24, 2019
in
Chemistry
by
kratos
language of chemistry
class-7
icse
class-8
+3
votes
1
answer
Give the symbols and valencies of following ********: (a) Hydroxide (b) Chloride
asked
Jan 17, 2019
in
Chemistry
by
kratos
class-8
molecules
language of chemistry
class-7
icse
atoms
+3
votes
1
answer
Write symbolic representation for the following word equations and balance them : (a) Calcium carbonate → Calcium oxide + Carbon dioxide
asked
Jan 13, 2019
in
Chemistry
by
kratos
language of chemistry
class-7
icse
class-8
+3
votes
1
answer
Write your observations and name the products when (a) Zinc reacts with dilute hydrochloric acid.
asked
Jan 12, 2019
in
Chemistry
by
kratos
class-8
acids bases and salts
language of chemistry
class-7
icse
class-10
+2
votes
1
answer
What fundamental law is demonstrated in balancing equations.
asked
Jan 5, 2019
in
Chemistry
by
kratos
cbse
class-8
class-11
chemical reactions
language of chemistry
chemical reaction and catalyst
class-10
icse
class-7
chemical reactions and equations
+1
vote
1
answer
Differentiate between: Chemical reaction and chemical equation
asked
Dec 22, 2018
in
Chemistry
by
kratos
language of chemistry
class-7
icse
class-8
+3
votes
1
answer
Fill in the blanks: (a) The substances which undergo chemical change are called................
asked
Dec 8, 2018
in
Chemistry
by
kratos
language of chemistry
class-7
icse
class-8
+1
vote
1
answer
1. Na + O2 —–> Na2O 2. H2O2 —–> H2O + O2
asked
Dec 3, 2018
in
Chemistry
by
kratos
neet
redox reactions
jee advanced 2020
cbse
class-8
language of chemistry
class-10
icse
ionic equilibrium
chemical reactions and equations
class-12
+2
votes
1
answer
Balance the following chemical equations : (a) FeS + HCl → FeCl2 + H2S
asked
Nov 29, 2018
in
Chemistry
by
kratos
language of chemistry
class-7
icse
class-8
+1
vote
1
answer
A solution of a substance ‘X’ is used for white washing. i. Name the substance ‘X’ and write its formula.
asked
Nov 19, 2018
in
Chemistry
by
kratos
cbse
class-8
language of chemistry
class-10
icse
chemical reactions and equations
+2
votes
1
answer
A solution of substance 'X' is used for white washing: (i) Name the substance'X' and write its formula.
asked
Nov 17, 2018
in
Chemistry
by
kratos
cbse
class-8
acids bases and salts
language of chemistry
class-10
icse
chemical reactions and equations
+3
votes
1
answer
Write word equations for the following skeletal equations: (a) KClO3 → KCl + O2
asked
Nov 15, 2018
in
Chemistry
by
kratos
language of chemistry
class-7
icse
class-8
+3
votes
1
answer
Write the molecular formula of Sodium Sulphide.
asked
Nov 10, 2018
in
Chemistry
by
kratos
compounds
class-8
molecules
language of chemistry
class-6
class-9
class-7
icse
elements
symbols and formulae
is matter around us pure
atoms and molecules
atoms
+3
votes
1
answer
Balance the following equations. Also name the products formed. The first one is done for you. 1. NaNO3 → NaNO2 + O2 Name of product(*)
asked
Oct 22, 2018
in
Chemistry
by
kratos
language of chemistry
class-7
icse
class-8
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