Advertisements
Advertisements
प्रश्न
Name the following:
A metal used in packaging.
उत्तर
Aluminium
APPEARS IN
संबंधित प्रश्न
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.
State one use of Silver.
State one use of Mercury.
Explain how, a reduction reaction of aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved.
What is meant by 22 carat gold? Name the metals which are usually alloyed with gold to make it harder.
What is an alloy? Give two examples of alloys.
Give reasons
Graphite is used in the leads of pencils
State two important uses of following metals:
Uses of iron
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Water.
Write scientific reason.
Generally the ionic compounds have high melting points.
Write scientific reason.
Sodium is always kept in kerosene.
Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
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.
An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.
Can you store pickle in an aluminium utensil? Give reason.
Which of the following property is generally not shown by metals?
Which metal has the highest ductility?
Which metals are not solid at room temperature?
Compare the conductivity of metals and non–metals.
The metals which are found in both free state as well as combined state are ______.
