Metals and Non-metals
The metal which does not react with cold as well as hot water but reacts with steam is
(1) Cu
(2) Zn
(3) Na
(4) Fe
A. | Option 1 |
B. | Option 2 |
C. | Option 3 |
D. | Option 4 |
Option: 4 Solution : -. |
Metals and Non-metals
Bauxite is an ore of aluminium. It is concentrated suitably on treating with
(1) Conc. NaOH solution
(2) Na2CO3
(3) Coke and N2
(4) Any of the above
A. | Option 1 |
B. | Option 2 |
C. | Option 3 |
D. | Option 4 |
Option: 1 Solution : -. |
Metals and Non-metals
A metal is strongly heated in presence of air to form a black mass. So the metal is
(1) Potassium
(2) Platinum
(3) Copper
(4) Zinc
A. | Option 1 |
B. | Option 2 |
C. | Option 3 |
D. | Option 4 |
Option: 3 Solution : -. |
Metals and Non-metals
Calamine ore can be converted into ZnO by the process of.
(1) Dehydration
(2) Roasting
(3) Calcinations
(4) Sulphonation
A. | Option 1 |
B. | Option 2 |
C. | Option 3 |
D. | Option 4 |
Option: 3 Solution : -. |
Metals and Non-metals
The molecular formula of potash alum is
(1) K2SO4.Al2(SO4)3.24H2O
(2) Ca(OCl)Cl
(3) )K2SO4
(4) Al2(SO4)3.24H2O
A. | Option 1 |
B. | Option 2 |
C. | Option 3 |
D. | Option 4 |
Option: 1 Solution : -. |
Metals and Non-metals
Which of the following compounds is bad conductor of electricity?
(1) Ionic compound
(2) Electrovalent compound
(3) Covalent compound
(4) None of these
A. | Option 1 |
B. | Option 2 |
C. | Option 3 |
D. | Option 4 |
Option: 3 Solution : -. |
Metals and Non-metals
Which of the following gas is known as tear gas ?
(1) methyl isocyanide
(2) sulphur dioxide
(3) chloropicrin
(4) nitrous oxide
A. | Option 1 |
B. | Option 2 |
C. | Option 3 |
D. | Option 4 |
Option: 3 Solution : -. |
Metals and Non-metals
The impurity present in the ore is called ..........
(1) gangue
(2) flux
(3) slag
(4) mineral
A. | Option 1 |
B. | Option 2 |
C. | Option 3 |
D. | Option 4 |
Option: 1 Solution : -. |
Metals and Non-metals
Consider the following pairs of elements :
I and H , C and F, Ba and F, N and F, K and O
The correct statement regarding these pairs is :
(1) The two pairs Ba and F, K and O most likely to form Ionic bonds
(2) The least polar bond is formed between C and F
(3) Bet ween I and H an ionic bond is formed
(4) Between N and F the covalent bond is most polar
A. | Option 1 |
B. | Option 2 |
C. | Option 3 |
D. | Option 4 |
Option: 1 Solution : -. |