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प्रश्न
Mention two uses of the following metals and non-metals
Oxygen
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उत्तर
It is used by all living beings for breathing.
It is important for combustion.
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संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Copper displaces zinc from zinc sulphate solution. ( )
The atomic number of an element X is 12.
(a) What must an atom of X do to attain the nearest inert gas electron configuration?
(b) Which inert gas is nearest to X?
Give reasons
Aluminium is used in making aircrafts.
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
Write name.
The reagent that dissolves noble metals.
When a copper coin is dipped in silver nitrate solution, a glitter appears on the coin after some time. Why does this happen? Write the chemical equation.
Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. Write name of any element present in the same group as X
Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
Give reasons for the following:
Most metals conduct electricity well.
Write the name.
Two highly reactive metals-
Halogen reacts with acid.
Electronic configuration of metal A is 2,8,1. Electronic configuration of metal B is 2,8,8,2. Which of the above metals is more reactive? Explain with reason.
What is ductility?
Give reasons for the following.
- Aluminum foils are used to wrap food items.
- Immersion rods for heating liquids are made up of metallic substances.
- Sodium and potassium are stored in kerosene.
- Mercury is used in thermometers.
Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?
Which one of the following metals do not react with cold as well as hot water?
Give an example of a metal which
- is liquid at room temperature.
- is the best conductor of heat.
Which of the following is not a metal?
The liquid metal at room temperature ______.
Which metal has the highest ductility?
