generally metals react with acids to form salt and H2 gas

On reaction with HNO3 which of the following metals will react to form salt and hydrogen

which of the following properties are responsible for aluminium to be ued for cooking utensils ?

i ductility

ii high melting point

iii good thermal conductivity

iv good electrical conductivity

which of the following property is *generally not* shown by metals

which of the following metal reacts with cold as well as hot water

Diamond - an allotrope of carbon is the hardest substance as well as have :

which of the following oxide of iron would form onreaction with steam

In aqua regia, mixture is comprised of -

from which one of the following four metals would be displaced from the other three from the solution of its salt

hydrogen gas is not evolved when metals react with dilute HNO*3 because -

when aluminium reacts with caustic soda its forms H2 gas and :

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Anodising is a process of forming a thick layer of -

a non metal which is an imp constituent of our food forms 2 oxides

=> oxide A is toxic

=> oxide B is harmful for global warming

identify A and B

TWO metals A and B on rubbing change into liquid. The elements A and B respectively are

A metal M does not liberate hydrogen from acids but reacts with oxygen togive a black colour product. The metal M is

Three elements X, Y and Z react with cold water, hot water, steam respectively, and liberate hydrogen. Which of the following sequence of elements explains the observations?

Assertion (A): Electrovalent compounds are generally insoluble in water.

Reason(R): Copper is lower than aluminium in the reactivity series.

Assertion (A): Metals above hydrogen in activity series can displace hydrogen from dilute acids.

Reason (R) Metals occur in nature only in the form of their compounds.