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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
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उत्तर
True.
APPEARS IN
संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Copper displaces zinc from zinc sulphate solution. ( )
Fill in the following blanks with suitable words:
A metal having low melting point is ..................... but a non-metal having very high melting point is ..............
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?
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?
Fill in the following blank with suitable word:
Brass is an alloy of copper and .........
Give reasons
Aluminium is used in making aircrafts.
A metal with melting point less than 50°C is
A metal which is neither ductile nor malleable is
Statements given below are incorrect. Write the correct statements :
Zinc is used for making power transmission wires.
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Oxygen
Write name.
The device used for grinding an ore.
What is it made from? Why?
A pair of tongs.
What is it made from? Why?
Electric cables
Give a reason why iron objects rust easily but the iron pillar at Qutab Minar has not rusted over the years.
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?
The metal can be cut with a knife ______.
Why are metalloids called semimetals?
Compare the conductivity of metals and non–metals.
