MEDIUM
10th CBSE
IMPORTANT
Earn 100

Will carbon monoxide (CO) change the colour of blue litmus?

Important Questions on Metals and Non - Metals

HARD
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 3 - Metals and Non - Metals>Summative Assessment>Q 4
Give reason for the following:
Metals replace hydrogen from dilute acids where as non-metals do not.
HARD
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 3 - Metals and Non - Metals>Summative Assessment>Q 4
Give reason for the following:
Carbonate and sulphide ores are usually converted into oxides.
HARD
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 3 - Metals and Non - Metals>Summative Assessment>Q 4
Give reason for the following:
Why has sodium chloride a high melting point?
MEDIUM
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 3 - Metals and Non - Metals>Summative Assessment>Q 4
Give reason for the following:
If pure water is used, no electrolysis takes place.
HARD
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 3 - Metals and Non - Metals>Summative Assessment>Q 5
State which of the following chemical reactions will take place or not, giving suitable reason for each :

(i) Zns+CuSO4aq→ZnSO4aq+Cus

(ii) Fes+ZnSO4aq→FeSO4aq+Zns
HARD
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 3 - Metals and Non - Metals>Summative Assessment>Q 6

A student has been collecting silver coins and copper coins. One day he observed a black coating on silver coins and green coating on copper coins.

Which chemical phenomenon is responsible for the coating? What are these coatings?

MEDIUM
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 3 - Metals and Non - Metals>Summative Assessment>Q 7
Name the cathode and anode in the refining of copper.
HARD
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 3 - Metals and Non - Metals>Summative Assessment>Q 7
Show the formation of NaCl from sodium and chlorine atoms by the transfer of electrons.