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प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
पर्याय
True
False
उत्तर
True.
APPEARS IN
संबंधित प्रश्न
Give a reason for Alkali metals are good reducing agents.
The atomic number of an element Y is 16.
(a) What must an atom of Y do to achieve the nearest inert gas electron arrangement?
(b) Which inert gas is nearest to Y?
What is meant by 22 carat gold? Name the metals which are usually alloyed with gold to make it harder.
Mention two uses of the following metals and non-metals
Aluminium
A metal which is neither ductile nor malleable is
Aluminium is not used to make :
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
State two important uses of following metal
Uses of aluminium
State the position of the following in the periodic table:
Alkali metals
State the position of the following in the periodic table:
Aluminium
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Sulphuric acid
Write scientific reason.
Pine oil is used in froth flotation.
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
Name the following:
The chemical compound responsible for the green deposit on the surface of articles of copper.
Name the following:
A metal used in flexible pipes.
Write scientific reason.
Meena’s mother uses lemon or tamarind for cleaning copper vessels turned greenish.
The most abundant element in the universe is ____________.
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
Name two major non-metals which are present in fertilisers and enhance the growth of plants.
