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Recent questions tagged ncert class 10 science
+2
votes
1
answer
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice.
asked
Apr 7, 2019
in
Class 10
by
kratos
metals and nonmetals
cbse
acids bases and salts
class-10
ncert class 10 science
+2
votes
1
answer
What chemical process is used for obtaining a metal from its oxide ?
asked
Apr 7, 2019
in
Class 10
by
kratos
metals and nonmetals
ncert class 10 science
class-10
cbse
+1
vote
1
answer
What is meant by refining of metals? In the electrolytic refining of metal M, name the cathode, anode and the electrolyte.
asked
Apr 7, 2019
in
Class 10
by
kratos
metals and nonmetals
ncert class 10 science
class-10
cbse
+3
votes
1
answer
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
asked
Apr 3, 2019
in
Class 10
by
kratos
ncert class 10 science
class-10
cbse
periodic classification of elements
+2
votes
1
answer
Give reason. Chemical reaction does not take place when copper is added to iron sulphate solution. Why?
asked
Apr 3, 2019
in
Class 10
by
kratos
metals and nonmetals
cbse
acids bases and salts
class-10
metals and non-metals
ncert class 10 science
+3
votes
1
answer
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice.
asked
Mar 28, 2019
in
Class 10
by
kratos
metals and nonmetals
cbse
acids bases and salts
class-10
ncert class 10 science
+1
vote
1
answer
Give reason. Sodium, potassium and lithium are stored under oil. Why?
asked
Mar 26, 2019
in
Class 10
by
kratos
metals and nonmetals
ncert class 10 science
class-10
cbse
+2
votes
1
answer
Differentiate between metal and non-metal on the basis of their chemical properties.
asked
Mar 25, 2019
in
Class 10
by
kratos
metals and nonmetals
ncert class 10 science
cbse
+1
vote
1
answer
While cooking, if the bottom of the vessel is getting blackend on the outside, it means that:
asked
Mar 24, 2019
in
Class 10
by
kratos
cbse
class-8
combustion and flame
class-10
carbon and its compounds
ncert class 10 science
+3
votes
1
answer
The element X reacting with chlorine forms a water soluble compound having high melting point. Element X is
asked
Mar 24, 2019
in
Class 10
by
kratos
metals and nonmetals
cbse
ntse
class-10
ncert class 10 science
+2
votes
1
answer
Name two metals which are found in nature in the free state.
asked
Mar 19, 2019
in
Class 10
by
kratos
metals and nonmetals
ncert class 10 science
cbse
+1
vote
1
answer
Which of the following statements about the autotrophs is incorrect?
asked
Mar 14, 2019
in
Class 10
by
kratos
cbse
life processes
class-10
ncert class 10 science
periodic classification of elements
+3
votes
1
answer
Give a test that can be used to differentiate chemically between butter and cooking oil,
asked
Mar 14, 2019
in
Class 10
by
kratos
ncert class 10 science
class-10
carbon and its compounds
cbse
+3
votes
1
answer
An element A which is a part of common salt and kept under kerosene reacts with another element B of
asked
Mar 13, 2019
in
Class 10
by
kratos
metals and nonmetals
ncert class 10 science
class-10
cbse
+3
votes
1
answer
Distinguish between any two types of propagation of electromagnetic waves based on
asked
Mar 12, 2019
in
Class 12
by
kratos
cbse
electromagnetic waves
ncert class 10 science
class-12
electromagnetic spectrum
+3
votes
1
answer
Write the functional group for (i) Aldehyde (ii) Ketone.
asked
Mar 10, 2019
in
Class 12
by
kratos
carboxylic acids
aldehydes
cbse
carbonyl compounds
ketones
class-10
carbon and its compounds
ncert class 10 science
class-12
+1
vote
1
answer
(i) Platinum, gold and silver are used to make jewellery.
asked
Mar 9, 2019
in
Class 10
by
kratos
metals and nonmetals
ncert class 10 science
class-10
cbse
+2
votes
1
answer
What would be the electron dot structure of carbon dioxide which has the formula CO2
asked
Mar 9, 2019
in
Class 10
by
kratos
metals and nonmetals
cbse
class-10
carbon and its compounds
ncert class 10 science
+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
+3
votes
1
answer
(a) Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
asked
Mar 7, 2019
in
Class 10
by
kratos
metals and nonmetals
ncert class 10 science
class-10
cbse
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