Advertisements
Advertisements
प्रश्न
Tick (√) the most appropriate answer.
Graphite is used :
विकल्प
for sterilisation of water
for making stainless steel
as dry lubricant
in making electric bulbs
Advertisements
उत्तर
as dry lubricant
APPEARS IN
संबंधित प्रश्न
What happens when Dilute sulphuric acid is poured on a copper plate?
Write word equations of the reactions involved.
What is an amalgam?
Name two alloys of iron. What elements are present in these alloys?
Brass is an alloy of copper and ______.
What is a thermite reaction? Explain with the help of an equation.
For the reduction of a metal oxide, suggest a reducing agent other than carbon.
Mention two uses of the following metals and non-metals
Oxygen
Write ‘true’ or ‘false’ for the following statement :
Silver is used to make electric cables.
Aluminium is not used to make :
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 the position of the following in the periodic table:
Iron and zinc
Why is hydrogen placed with alkali metals?
With reference to the following metal state its use in daily life:
Magnesium
With reference to the following metals state their use in daily life metal:
Silver
Name the following:
A metal used in packaging.
Which one of the following metals do not react with cold as well as hot water?
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
All gases are ______.
Compare the conductivity of metals and non–metals.
