ch 3 class 10

which metal is found in free state

• gold

• platinium

• silver

• iron

which is the lightest metal ?

• lithium

• caesium

• mercury

• non of these

metals does not liberate h2 gas with hno3 as it is a very -

what is amalgam ?

• alloy of a metal with iron

• alloy of a metal with mercury

• alloy of a metal with brass

• alloy of a metal with magnalium

which metal is the hardest known substance ?

• bromine

• sodium

• neon

• diamond

what is galvanization ?

• applying a coating of zinc to prevent form corrosion

• applying a coating of aluminium to prevent form oxidation

• applying a coating of iron to prevent form corrosion

• applying a coating of both aluminium and zinc to prevent form corrosion

solder is an alloy of -

• lead and iron

• tin and zinc

• aluminium and mercury

• lead and tin

ionic compounds are soluble in --------- and insoluble in ----------

• organic solvents , water

• water , organic solvents

• water , acid

• acid , base

Which of the following property is generally not shown by metals?

• Electrical conduction

• sonorous

• dullness

• ductility

In The Last Year Board Examination, Rahul Were Asked A Question Where He Had To Choose The Statement Which Was/Were Correct? Will You Be Able To Answer This Question?

• (A) metals are the elements that conduct heat and electricity, and are malleable and ductile.

• [B]. Ductile means which can be stretched (or drawn) to form thin wires. And brittle means which breaks into pieces on hammering or stretching.

• [C]. Malleable means which can be beaten with a hammer to form thin sheets (without breaking).

• [D]. All the above.