Eshaal Zahra IQ APTITUDE & ABILITY - General Everyday Science

The pH of soil is raised using:

A. Limestone. B. Gypsum. C. Urea. D. None of these.

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Explanation

Limestone (calcium carbonate) is commonly used to raise the pH of acidic soils, making them more alkaline.

Eshaal Zahra IQ APTITUDE & ABILITY - General Everyday Science

Isotopes of an element have an equal number of:

A. Protons. B. Neutrons. C. Both electrons and protons. D. None of these.

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Explanation

Isotopes of an element have the same number of protons but different numbers of neutrons, resulting in different atomic masses.

Eshaal Zahra IQ APTITUDE & ABILITY - General Everyday Science

Which vitamin is stored in the smallest amount in the human body?

A. Vitamin D. B. Vitamin C. C. Vitamin E. D. Vitamin A.

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Explanation

Vitamin C is water-soluble and not stored in significant amounts in the body, unlike fat-soluble vitamins like A, D, E, and K.

Eshaal Zahra IQ APTITUDE & ABILITY - General Everyday Science

What is a protein molecule composed of?

A. Alkaloids. B. Nucleosides. C. Short range chain of amino acids. D. Long range chain of amino acids.

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Explanation

Proteins are long chains of amino acids, which are the building blocks of life and perform a variety of functions in living organisms.

Eshaal Zahra IQ APTITUDE & ABILITY - General Everyday Science

One degree of longitude at the equator corresponds to a distance of:

A. 49 miles. B. 69 miles. C. 39 miles. D. 60 miles.

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Explanation

At the equator, one degree of longitude is approximately 69 miles, as the Earth's circumference is greatest at the equator.

Eshaal Zahra IQ APTITUDE & ABILITY - General Everyday Science

If the radius of a circle triples, how does its area change?

A. Three times. B. Six times. C. Nine times. D. None of these.

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Explanation

The area of a circle increases by the square of the factor by which the radius increases. If the radius triples, the area increases by nine times.

Eshaal Zahra IQ APTITUDE & ABILITY - General Everyday Science

What is the chemical formula for alum?

A. KAl(SO4)2?12 H2O. B. KSi(SO4)2?12 H2O. C. KAl(SO4)2?8 H2O. D. None of these.

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Explanation

Alum is a chemical compound with the formula KAl(SO4)2?12 H2O, commonly used in water purification and dyeing.

Eshaal Zahra IQ APTITUDE & ABILITY - General Everyday Science

What is the total number of combinations possible for choosing 3 items out of 9?

A. 18. B. 27. C. 48. D. 84.

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Explanation

The number of combinations of 9 items taken 3 at a time is calculated using the combination formula C(9,3), which equals 84.

Eshaal Zahra IQ APTITUDE & ABILITY - General Everyday Science

When do day and night become equal in length?

A. 23rd February and 21st September. B. 21st March and 23rd September. C. 23rd March and 21st September. D. None of these.

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Explanation

The equinoxes, occurring on 21st March and 23rd September, are when day and night durations are approximately equal.

Eshaal Zahra IQ APTITUDE & ABILITY - General Everyday Science

Fish liver oil contains:

A. Vitamin A only. B. Vitamin D only. C. Vitamin A and vitamin E. D. Vitamin A and Vitamin D.

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Explanation

Fish liver oil is rich in both Vitamin A and Vitamin D, which are essential for vision and bone health.