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प्रश्न
Name the following:
A metal used in flexible pipes.
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उत्तर
Lead
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संबंधित प्रश्न
Give reasons for the following.
Sodium and potassium are stored in kerosene.
Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(a) How will she find the nature of the gas?
(b) Write down word equations of all the reactions taking place in this process.
What elements are present in steel? How are the properties of steel different from those of pure iron?
Mention two uses of the following metals and non-metals
Aluminium
Give reasons
Aluminium is used in making aircrafts.
Statements given below are incorrect. Write the correct statements :
Bronze is a mixture of 10% copper, 80% zinc and 10% tin.
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
State two important uses of following metal:
Uses of silver
State two important uses of following metal
Uses of mercury
State the position of the following in the periodic table:
Alkaline earth metals
Write name.
Alloy of sodium with mercury.
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
State the position of the following in the periodic table:
Halogens
With reference to the following metals state their use in daily life metal:
Zinc
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white crystalline solid which decrepitates on heating leaving a residue which fuses with the glass and evolves two gases one of which is coloured and acidic.
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
- Na
- Ca
- Fe
- Cu
Why are metalloids called semimetals?
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
Metal atoms tend to have a maximum of ______ electrons in the outermost shell.
