Chemistry in Daily Life — Part 4: 40 MCQs with Explanations

BTU is the correct answer to “In which system of units, gas bills are charged”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Coke is made by heating coal in the absence of air at 1300 °C .

Chilled water attracts more carbon dioxide is the correct answer to “Why are soft drink made with chilled water rather than water at room temperature”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Malleability is the correct answer to “The property by virtue of which metals can be beaten into thin sheets is known as”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The second most abundant metal found in the earth’s crust is Silicon .

The gases which are used by drivers as an artificial atmosphere are helium and Oxygen .

0.03% is the correct answer to “Air contains volume of carbon dioxide approximately”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Material for rain-proof coats and tents owe their water proof properties to Surface tension .

Potassium is the correct answer to “Iodised salts contains the iodine salts of which metal”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Bromine is the correct answer to “Which of the following is a Non Metal that remains Liquid at room temperature”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Bronchiole is the correct answer to “Inhaled air passes through which of the following in the last”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

It is observed that the total pressure exerted by air on the man of average size is around 14.7 lb wt. per square inch. But the man feels quite comfortable,. It is because of An equal and opposite pressure acts from inside .

Xenon is the correct answer to “Which one of the following is also called Stranger Gas”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Pumice stone is the correct answer to “Which stone floats on water”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Density of Water is 997 kg/m³ .

Solid Carbon Dioxide is the correct answer to “Chemical Name of Dry Ice”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

4 to 5 ppm is the correct answer to “Disolved oxygen (DO) in water should be”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Nitrogen Dioxide is the correct answer to “Which of the following does not pollute the air”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Freezing point of water is 0 °C .

The density of Air is 1.225 kg/m3 .

The Percentage of Water used for Drinking in the world is 1%.

Helium is the correct answer to “Which gas was discovered on the sun about 151 years ago during total solar eclipse”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Water vapour beyond the dew point result in Condensation .

The temperature at which water boils depends mainly on Air pressure .

Fine organic or inorganic particles suspended in air is called aerosol .

Fog that most often forms as warm rain falls into a cold layer of surface air is called Evaporation (mixing) fog .

When oil and gas resources are burnt they kill many forests and lakes by acid rain .

Acid deposition causes lakes and forests to die .

Water vapor is A gas .

Nail polish remover is the correct answer to “Which of the following chemicals is not found in tobacco smoke”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The property of a substance to absorb moisture from the air on exposure is called deliquescence .

Average salinity or ratio of salt as per kilogram of water of ocean is 35 grams .

Magnalium is an alloy of Aluminium and Magnesium .

Which of the following metal occurs in free state Lead .

Dew point is reached is the correct answer to “Water vapour turns into clouds in the atmosphere when:”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

When a warm air is lifted off the surface in temperature depression it is called An occlusion .

Quantity of fresh air required for a man is 1000 cubic feet of air for every 20 minutes .

petrol molecules do not have any hydrogen bond is the correct answer to “Rate of evaporation of petrol is greater than that of water at room temperature because:”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Biochemical is the correct answer to “Water is a universal solvent for what reactions”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Carbon dioxide is the correct answer to “Which Gas is used in the preparation of Soft drinks”. Items of this type are drawn from the Chemistry in Daily Life — Part 4 syllabus of Pakistani competitive exams, where the fact is tested verbatim.