General Science

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Which planet has the longest day in our solar system?

A)
Mercury

B)
Saturn

C)
Venus

D)
Earth


Correct Answer :

Venus


Explanation :

Venus has the longest day of any planet in our solar system. It completes one rotation every 243 days of the earth.

Laughing gas is also called as?

A)
Hydrogen dioxide

B)
Sulphur dioxide

C)
Hydrogen peroxide

D)
Nitrous oxide


Correct Answer :

Nitrous oxide


Explanation :

Nitrous oxide(N2O), also called dinitrogen monoxide, laughing gas, or nitrous, is a chemical compound with the formula N2O. At room temperature, it is a colorless, odorless non-flammable gas with a slightly sweet taste. It is used in surgery and dentistry for its anaesthetic and analgesic effects.

Which Pigment in the skin of human beings protects the body from U.V radiation of Sun?

A)

Haemoglobin


B)

Chlorophyll


C)

Melanin


D)

Thyroxine



Correct Answer :

Melanin


Explanation :

In human skin, melanin are pigments that color our eyes, hair and skin.

Melanin darkens the skin and acts as a barrier to the sun.It is an effective absorbent of light and able to absorbed 99.9% UV radiation.

Which pollutant is present in Cigarette smoke?

A)

NO2


B)

Hb


C)

CO


D)

All of these



Correct Answer :

CO


Explanation :

Cigarette smoke contains thousands of chemical compounds. Some of the chemicals found in tobacco smoke include-

Nicotine
Hydrogen cyanide
Formaldehyde
Lead
Arsenic
Ammonia
Benzene
Carbon monoxide
Tar

Smallpox, cholera, tuberculosis(TB) and dysentery diseases are caused by?

A)

Air pollution


B)

Soil Pollution


C)

Water pollution


D)

Noise pollution



Correct Answer :

Water pollution

Vacuum cleaner was invented by ?

A)

William Cooke


B)

Hubert Cecil Booth


C)

Baltzar Von Platen


D)

Carl Munters



Correct Answer :

Hubert Cecil Booth


Explanation :

Hubert Cecil Booth (1871 - 1955) was a British engineer who and inventor of the first powered vacuum cleaner.

Study of 'Old age and Aging' is known as ?

A)

Oncology


B)

Gerontology


C)

Teratology


D)

Recrology



Correct Answer :

Gerontology


Explanation :

Gerontology is the study of aging and older adults. It includes, the study of physical, mental, and social changes in older people as they age.

Nitrous Oxide is popularly known as?

A)

Tear gas


B)

Cleanser gas


C)

Laughing gas


D)

Deoxidiser gas



Correct Answer :

Laughing gas


Explanation :

Nitrous oxide(N2O), also called dinitrogen monoxide, laughing gas, or nitrous, is a chemical compound with the formula N2O. At room temperature, it is a colorless, odorless non-flammable gas with a slightly sweet taste. It is used in surgery and dentistry for its anaesthetic and analgesic effects.

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Chemistry

The formation of sulphurous acid involves ?

The acid present in soft drinks is ?

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Physics

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A dynamo converts ?

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