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Every Day Science MCQs with Explanations

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521Every Day ScienceMedium

Atom is made up of____________different kinds of subatomic particles:

ATwo

BThree

CFour

DNone

Correct answer

B. Three

Explanation

Three is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

522Every Day ScienceMedium

The snow on the mountains does NOT melt all at once when it is heated by the sun because:

Ait has a low specific heat capacity

Bit becomes very hard

Cit reflects most of the heat from the sun

Dit has a high latent heat of fusion

Correct answer

D. it has a high latent heat of fusion

Explanation

At mountain, there is very large amount of snow i.e. m is very very high. And for melts of ice, latent heat of fusion is required. Latent heat of fusion = mass×Lf And since very very large mass is present so very high amount of heat is required which can’t be delivered by sun at once.

523Every Day ScienceMedium

Who discovered the Gamma Rays?

APaul Villard

BBohar

CJabar bin Hayan

DAlfred Marshall

Correct answer

A. Paul Villard

Explanation

Paul Villard is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

524Every Day ScienceMedium

_____________ are positively (+) charged particles?

AProtons

BNeutrons

CNone of These

DElectrons

Correct answer

A. Protons

Explanation

Protons is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

525Every Day ScienceMedium

Which part of the brain controls the Pituitary Gland?

AHippocampus

BHypothalamus

CMidbrain

DHindbrain

Correct answer

B. Hypothalamus

Explanation

The pituitary gland is no larger than a pea, and is located at the base of the brain. The gland is attached to the hypothalamus (a part of the brain that affects the pituitary gland) by nerve fibers and blood vessels.

526Every Day ScienceMedium

As comets get close to the sun, they start to “melt” and release gas and dust. This gas and dust forms what?

AOnly “coma” around the comet’s nucleus

BOnly a long tail that points away from the sun

C“coma” around the comet’s nucleus and a long tail that points away from the sun

D“coma” that points away from the sun and a long tail around the comet’s nucleus

Correct answer

C. “coma” around the comet’s nucleus and a long tail that points away from the sun

Explanation

“coma” around the comet’s nucleus and a long tail that points away from the sun is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

527Every Day ScienceMedium

Cooking gas is mixture of which two gases?

AHydrogen and oxygen

BMethane and oxygen

CNone of these

DMethane and CO2

Correct answer

B. Methane and oxygen

Explanation

Methane and oxygen is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

528Every Day ScienceMedium

Who invented the safety pin?

AWalter Hunt

Bsteward Harshone

CCharles Goodbye

DA.Rose

Correct answer

A. Walter Hunt

Explanation

Walter Hunt is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

529Every Day ScienceMedium

Rate of evaporation of petrol is greater than that of water at room temperature because:

Apetrol molecules have greater size

Bpetrol molecules do not have any hydrogen bond

Cpetrol is an organic compound

Dwater molecules have small size

Correct answer

B. petrol molecules do not have any hydrogen bond

Explanation

petrol molecules do not have any hydrogen bond is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

530Every Day ScienceMedium

The protons and neutrons are found in the center of the atom, which is called the _________of the atom?

AHeadquarters

BNucleus

CHub

DNone of These

Correct answer

B. Nucleus

Explanation

Nucleus is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

The snow on the mountains does NOT melt all at once when it is heated by the sun because:

Ait has a low specific heat capacity

Bit becomes very hard

Cit reflects most of the heat from the sun

Dit has a high latent heat of fusion

Correct answer

D. it has a high latent heat of fusion

Explanation

Which part of the brain controls the Pituitary Gland?

AHippocampus

BHypothalamus

CMidbrain

DHindbrain

Correct answer

B. Hypothalamus

Explanation

As comets get close to the sun, they start to “melt” and release gas and dust. This gas and dust forms what?

AOnly “coma” around the comet’s nucleus

BOnly a long tail that points away from the sun

C“coma” around the comet’s nucleus and a long tail that points away from the sun

D“coma” that points away from the sun and a long tail around the comet’s nucleus

Correct answer

C. “coma” around the comet’s nucleus and a long tail that points away from the sun

Explanation

Rate of evaporation of petrol is greater than that of water at room temperature because:

Apetrol molecules have greater size

Bpetrol molecules do not have any hydrogen bond

Cpetrol is an organic compound

Dwater molecules have small size

Correct answer

B. petrol molecules do not have any hydrogen bond

Explanation

petrol molecules do not have any hydrogen bond is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.