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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.
Generally, non-metals react with acids. ( )
State one use of Iron.
For the reduction of metal oxide, suggest a reducing agent other than carbon.
Mention two uses of the following metals and non-metals
Iodine
Fill in the blank
_______ is a soft metal.
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
State the position of the following in the periodic table:
Aluminium
Give the general characteristics of:
Alkaline earth metals with reference to
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Water.
Write name.
The reagent that dissolves noble metals.
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
Give reasons for the following:
Most metals conduct electricity well.
What is ductility?
The most abundant element in the universe is ____________.
Which of the following property is generally not shown by metals?
The typical shine of metals is called ______.
All gases are ______.
Sodium is a hard metal.
Match the following
| i. | Silica | a. | Caustic potash |
| ii. | Potassium hydroxide | b. | Sand |
| iii. | Sodium hydroxide | c. | Calamine |
| iv. | Zinc carbonate | d. | Caustic soda |
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
