Identify the following A - A non-metallic lubricant B - A metal which does not react with water but reacts with steam C - A metal which is constituent of baking powder D - a non-metal used in fire crackers A, B, C, D respectively are?

Phosphorus, Zinc, Sodium, Sulphur
Carbon, Copper, Sodium, Phosphorus
Carbon, Copper, Calcium, Sulphur
Phosphorus, Copper, Calcium, Sulphur

LohaHridoy

14 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 1 : Phosphorus, Zinc, Sodium, Sulphur

The correct answer is Phosphorus, Zinc, Sodium, Sulphur.

Concept:

Non-metals are materials that do not have the properties of metals, such as being shiny, hard, fusible, malleable, ductile, etc.
- Examples of non-metals are carbon, sulphur, iodine, oxygen, hydrogen, etc
Metals are materials that have the properties of being shiny, hard, fusible, malleable, ductile, etc.
- Examples of metals are iron, copper, aluminium, calcium, magnesium, etc.

Explanation:

Phosphorus- A non-metallic lubricant

Phosphorus is a non-metallic lubricant.
Phosphorus components are likely the earliest known and most important lubricant additives.

Zinc - A metal that does not react with water but reacts with steam

Metals react with steam:
- When a metal reacts with steam it forms metal oxide and hydrogen gas is evolved.
- Metal + Steam Metal oxide + Hydrogen
Metals react with water:
- Metals react with water to form metal hydroxide or metal oxide.
Zinc does not react with cold or hot water. They react with steam slowly to give the respective oxides:
Zinc + Steam → Zinc oxide + Hydrogen gas
Zinc reacts with steam when being heated and gives hydrogen gas and Zinc oxide.

Sodium - A metal which is constituent of baking powder

Baking powder contains the elements sodium, hydrogen, carbon, and oxygen.
Baking powder is a combination of sodium hydrogen carbonate and tartaric acid, an edible acid.
It is a raising agent that is commonly used in the baking of cakes.
When liquid is added to the baking powder, it produces carbon dioxide and forms bubbles, causing the mixture to expand.

Sulphur- a non-metal used in fire crackers

Sulphur and other non-metals are used in the production of crackers.
Metal salts and metal oxides in fireworks react to produce an array of colours.
Sulphur and phosphorus are the most common non-metals used in crackers.
The gunpowder is made up of 75% potassium nitrate, 15% charcoal, and 10% sulphur, which is the spine of crackers.

14 views Answered 2022-09-04 04:29

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