Question

Whats happens when :-

( 1 ) Calamine is calcined

(2) Silica is heated with lime stone.

(3) Sodium metal is dropped in Water,

(4) Zinc blande is reasted​

Answer 1

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( 1 ) Calamine is calcined

Carbonate ores are converted to metal oxides by calcination (heating in the absence of air). When calamine ore (zinc carbonate) is heated in the absence of air, it is converted into zinc oxide.

(2) Silica is heated with lime stone.

Quick lime is heated with silica to obtain calcium silicate

(3) Sodium metal is dropped in Water,

Sodium (Na) is metal which is extremely reactive which reacts with water and produces hydrogen gas. H2 gas catches fire as it creates intense heat from the reaction.

(4) Zinc blande is reasted

Ore of Zinc Blende is roasted in air (oxygen) to obtain Zinc Oxide.

Answer 2

Answer:

$\bigstar\:\:\underline{\sf AnsWer :} \bigstar$

( 1 ) Calamine is calcined

Carbonate ores are converted to metal oxides by calcination (heating in the absence of air). When calamine ore (zinc carbonate) is heated in the absence of air, it is converted into zinc oxide.

(2) Silica is heated with lime stone.

Quick lime is heated with silica to obtain calcium silicate

(3) Sodium metal is dropped in Water,

Sodium (Na) is metal which is extremely reactive which reacts with water and produces hydrogen gas. H2 gas catches fire as it creates intense heat from the reaction.

(4) Zinc blande is reasted

Ore of Zinc Blende is roasted in air (oxygen) to obtain Zinc Oxide.