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प्रश्न
Name a metal which can be cut with a knife :
उत्तर
Sodium
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संबंधित प्रश्न
Write a balanced chemical equation for the reaction of zinc with potassium hydroxide solution.
For the electro-refining of copper: What is the cathode made up of?
The electronic configurations of three elements X, Y and Z are:
| X : 2 | Y : 2, 8, 7 | Z : 2, 8, 2 |
Which of the following is correct regarding these elements?
(a) X is a metal
(b) Y is a metal
(c) Z is a non-metal
(d) Y is a non-metal and Z is a metal
Name a non-metal that is lustrous
Name a non-metal that is liquid at room temperature
Name the metals present in the following alloys
Brass
Give four differences between metals and non-metals with reference to their:
- Melting point and boiling point
- The conductivity of heat and electricity
- Malleability
- Solubility
Fill in the blank.
A non-metal used to purify water is ______.
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Basic oxide………..
Name:
two metals which are soft
Name two metalloids.
Name a non-metal which can form a positive ion.
Name the following:
An Alloy of copper and Zinc.
Explain the following:
Metals like calcium and magnesium are never found in their free state in nature.
Distinguish between the physical properties of metals and non-metals with reference to:
(a) lusture (b) malleability (c) ductility (d) tensile strength (e) sonority (f) conduction of heat and electricity (g) melting and boiling point (h) density.
Brass : Aluminium and zinc : : Bronze : ______
Write the name.
Nonmetal which is a good conductors of electricity.
Give two examples of alloy.
______ is the only non-metal which conducts electricity.
Reason out
Sulphur is used in the vulcanization of rubber.
