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प्रश्न
Name the metals present in the following alloys
Duralumin
उत्तर
Duralumin— Aluminium and copper
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संबंधित प्रश्न
Choose the most appropriate answer of the following:
This is not an alloy of copper:
(A) Brass
(B) Bronze
(C) Solder
(D) Duralumin.
For the electro-refining of copper: Write the reaction that takes place at the anode
Name a non-metal that is used for filling into electric bulbs
Statements given below are incorrect. Write the correct statements :
Soda water is prepared by dissolving washing soda in water.
Write ‘True’ or ‘False’ in front of following statements.
Non-metals are poor conductors of electricity.
State any five physical properties of a metal.
Physical properties of a metal :
Name the non-metal and its natural form, which is the hardest substance.
Define metal and non-metal on the basis of electron loss or gain.
Name:
a non-malleable metal
`Mg +H_2SO_4 → —+ — `
How many valence electrons are present in:
(ii) non-metals?
Distinguish between an ore and a metallic compound.
Write scientific reason.
Copper and brass vessels are cleaned with lemon.
How are metals like sodium, potassium, and calcium obtained? Give equations.
How are metals like sodium, potassium, and calcium obtained? Give equations.
Match the columns.
| Group A | Group B |
| 1. Making sheets of metals | a) Sonority |
| 2. Making metal utensils | b) Malleability |
| 3. Making Copper wires | c) Good conductor of heat |
| 4. Making bells from metal | d) Ductility |
Identify who I am!
Amphoteric oxide forming metal- _______
______ is the only non-metal which conducts electricity.
Name six common non-metals and write their symbols.
Which of the following non-metal is lustrous?
