CHEMISTRY [1 Mark Question Answer]

Carbon monoxide is produced by burning coal or wood in a limited supply of air. Since the gas is colourless and a barely detectable smell, people do not feel it and it can be proved as a silent killer.

Black diamonds have copper oxide present in them as impurity.

Allotropy is defined as the phenomenon due to which an element exists in two or more forms in the same physical state with identical chemical properties but with different physical properties.

Artificial diamond.

Carbon dioxide.

Bone charcaol, bone oil and organic compound pyridine.

Wood charcoal is formed when wood is burnt in limited supply of air.

Due to its high adsorbing capacity, wood charcoal is used as gas masks to adsorb harmful gases. Wood charcoal is porous, that is why it is used to filter water.

Destructive Distillation: When a substances is heated in the absence of air. The process is called destructive distillation.
Products formed are: Coke, Coal tar, Coal gas and ammonia solution

The Carbon content of bone charcoal is separated by treating the latter with hydrchloride acid, which dissolves the calcium phosphate. Carbon is then filtered out of the solution and in this form it is called bone black.

Adsorption is the property due to which a substance absorbs gases, liquids and solids on its surface.

Solid carbon dioxide serves as a coolant and refrigeration for preserving food articles.

In both of these fire extinguishers, the solutions are prepared in water, which conducts electricity. As a result an electric shock might result, which might lead to short- circuiting and another fire.

When the pressure is released the bottled gas escapes with a bristling effervescence that ads fizz to the drink.

Carbon dioxide is formed.

Blue litmus paper turns red.

Lit splinter extinguishes.

By upward displacement of air.

Calcium carbonate and dilute hydrochloric acid.