Explanation

The 100 percent pure gold is 24-carat gold.

Lower cartages contain less gold 18-carat gold contains 75 percent gold and 25 per cent other metals, often copper or silver.

Carat is the unit of measurement for the physical weight of diamonds/Gold.

ND16-8-2023

Explanation

Aqua is a greenish-blue color, often thought of as the shade of water.

Aqua, water in Latin, is a variation of cyan that sits between green and blue in the color wheel.

Aqua means پانی

Water means پانی

Explanation

Copper, silver, aluminum, gold, steel, and brass are common conductors of electricity.

The most highly conductive metals are silver, copper, and gold

Silver is the first-best conductor of heat.

Copper is the second-best conductor of heat.

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ND30-12-2022

Explanation

• The largest Coal Producing Country in the World in China
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• China is by far the leading hard coal producer worldwide, over the last three decades.
  
• the five leading coal-producing countries in the world.
  

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Explanation

Stainless steel is a alloys that contain a minimum of approximately 11% chromium, a composition that prevents the iron from rusting and also provides heat-resistant properties.

Explanation

Sodium is a chemical element with the symbol Na and atomic number 11.

It is a soft, silvery-white, highly reactive metal.

Sodium is an alkali metal, being in group 1 of the periodic table.

Explanation

Chlorine is the gas used to disinfect and purify water.

It is passed through water to kill bacteria.

Explanation

Explanation

Galvanized iron sheets have a coating of zinc. 

Galvanization is a process where a layer of zinc is applied to iron or steel to protect it from rusting, making "galvanized iron" essentially iron coated with zinc

Explanation

Nichrome, an alloy of nickel and chromium.

It is used because of its high resistance and ability to withstand high temperatures without oxidizing.