Chemistry in Daily Life — Part 1: 40 MCQs with Explanations

Thinner is the correct answer to “As we go higher into the atmosphere, the air becomes”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The chief constituents of gobar gas is Methane .

A fresh egg when placed in salt water will Float .

Triple point of water is 273.16 K .

Lead is the correct answer to “Which metal pollute the air of a big city”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The gases used in different types of welding would include: oxygen and acetylene .

Hydrogen is the correct answer to “Which of the gas is not known as green house gas”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The chemical name of chalk is Calcium carbonate.

pH value of water is 6.5-8.5 .

Main constituent in air is Nitrogen .

Permanent hardness of water is due to the presence of Calcium sulfate .

97% is the correct answer to “What is the percentage of salt water on earth surface”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Fogs is the correct answer to “The maximum risk to air travel is from”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The most abundant element in sea water is Chlorine.

The Shortest air route from Moscow to San Francisco is Over the Atlantic Ocean.

The metal that is used as a catalyst in the hydrogenation of oils is Ni .

Gold and Silver are known as Both A & B metals.

Nebula is the correct answer to “Huge cloud of gass and dust in the universe is called”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The most suitable thermometer for measuring boiling point of water is Mercury Thermometer.

The chemical name of bauxite Aluminium Oxide .

Mercury is the correct answer to “Which metal known as quick silver”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Energy possessed by water in a dam is Potential energy.

Charge carriers in a metal are electrons rather than protons because electrons are Loosely bound.

Vitamin A is the correct answer to “Retinol is the chemical name of”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Dielectric constant of water is 80.

Methane and oxygen is the correct answer to “Cooking gas is mixture of which two gases”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

With the rise in temperature, metals conductivity Decreases .

Slightly higher temperature than fresh water. is the correct answer to “Sea water (Salt water) freezes at”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Atmospheric pressure decrease rapidly with altitude because the air becomes Less denser .

Glycerine is the correct answer to “Which product is obtained in the manufacture of soap from oils:”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The chemical used as a fixer in photography is Sodium thiosulphate .

The group of minerals chemically containing hydrocarbons is Organic group .

Magnesium is the correct answer to “Which metal is extracted from sea water”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Convection is the correct answer to “During which process of energy exchange does cold air displace warmer air”. Items of this type are drawn from the Chemistry in Daily Life — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The process by which air flows from one location in the atmosphere to another is called Convection .

Heavy mechanical complex use a large amount of water for Cooling .

What percentage of earth’s water supply is fresh water 3% .

Percentage of water in an apple is 84% .

Percentage of water in a tomato is 94% .

What is the number of known crystalline phases of water 18 .