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प्रश्न
With reference to the physical properties of metals and non-metals, state the following exception.
A metal which floats on water.
उत्तर
Lithium (Li), Sodium (Na), Potassium (k).
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संबंधित प्रश्न
Give an example of a metal which is the best conductor of heat.
Give reasons for the following.
Aluminium foils are used to wrap food items.
Can you store lemon pickle in an aluminium utensil? Explain.
Choose the most appropriate answer of the following:
This is not an alloy of copper:
(A) Brass
(B) Bronze
(C) Solder
(D) Duralumin.
Write a balanced chemical equation for the reaction of zinc with potassium hydroxide solution.
For the electro-refining of copper: Write the reaction that takes place at the anode
State any five physical properties of non-metals.
Define non-metals. Give five examples of non-metals.
How do non-metals react with oxygen? Explain with an example. Give equation of the reaction involved. What is the nature of the product formed? How will you demonstrate it?
Give reasons
Tungsten is used in electric bulbs.
Name the metals present in the following alloys
Brass
Name the metals present in the following alloys
Duralumin
Fill in the blank:
A metal stored in kerosene oil is _______
Name a non-metal which is liquid form at room temperature.
Name:
a metal with dull appearance
Name:
a non- metal used in alloys
`Mg +H_2SO_4 → —+ — `
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Amphoteric oxide …………
Name:
two non metals which are monoatomic
Explain the term Gangue .
