Q:

Consider the following constituent gases of the atmosphere :

1. Argon

2. Neon

3. Helium

4.Ceirbon dioxide

Which one of the following is the correct ascending sequence of the above gases in terms of the volume percentage?

A) 1-3-2-4	B) 1-4-2-3
C) 4-2-3-1	D) 2-4-1-3

Answer & Explanation Answer: B) 1-4-2-3

Explanation:

Composition of Dry Air (Substance, % by volume)

Nitrogen, N2 78.08

Oxygen, O2

20.95

Argon, Ar 0.93

Carbon dioxide, CO2 0.033

Neon, Ne 0.0018

Helium, He 0.00052

Methane, CH4 0.0002

Krypton, Kr 0.00011

Dinitrogen oxide, N2O 0.00005

Hydrogen, H2 0.00005

Ozone, O3 0.000001

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Filed Under: Chemistry
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0 43042

Q:

Out of all known elements, the minimum number is of ______.

A) Metals	B) Non-metals
C) Metalloids	D) No option is correct

Answer & Explanation Answer: C) Metalloids

Explanation:

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0 43018

Q:

Which type of reaction occurs when carbon burns in oxygen to give carbo dioxide?

A) Addition reaction	B) Substition reaction
C) Combustion reaction	D) Decomposition reaction

Answer & Explanation Answer: C) Combustion reaction

Explanation:

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0 43012

Q:

Milk of Magnesia is used as a

A) Laxative	B) Pain killer
C) Sedative	D) Antibiotic

Answer & Explanation Answer: A) Laxative

Explanation:

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0 42944

Q:

The first newspaper published in India in 1780 was

A) The Bengal Gazette or Calcutta General Advertiser	B) The Calcutta Chronicle
C) The Madras Courier	D) The Bombay Herald

Answer & Explanation Answer: A) The Bengal Gazette or Calcutta General Advertiser

Explanation:

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Filed Under: Indian History

203 42911

Q:

Among the components of the dermis are:

a. sweat glands

b. hair follicles

c. collagen fibers

d. sensory- nerve endings

e. arrestor pill muscles

A) a, b, d	B) a, b, c, d, e
C) a, b, c, e	D) a, c, d

Answer & Explanation Answer: B) a, b, c, d, e

Explanation:

The dermis is a layer of the skin of the integumentary system. The dermis lies deep to the superficial epidermis which is also the most superficial layer of the skin. The dermis lies superficial to the underlying hypodermis which is also referred to as subcutaneous tissue.

Among the components of the dermis are: sweat glands, hair follicles, collagen fibers, sensory- nerve endings and arrestor pill muscles.

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Filed Under: Biology
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1 42874

Q:

_____ is not caused by airborne transmission.

A) Tuberculosis	B) Chickenpox
C) Measles	D) Hepatitis B

Answer & Explanation Answer: D) Hepatitis B

Explanation:

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Filed Under: Biology
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1 42694

Q:

Organs having different structure and components but perform similar functions are called ______.

A) Analogous organs	B) Homologous organs
C) Heterogeneous organs	D) Homogenous organs

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