Q:

Metal oxides which react with acids as well as bases are called

A) Amphoteric oxides	B) Neutral oxides
C) Basic oxides	D) Acidic oxides

Answer & Explanation Answer: A) Amphoteric oxides

Explanation:

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Q:

Which of the following is not correct with reference to Bio-sand Water Filter?

A) It deactivates or kills pathogens	B) Sedimentation removes larger particles
C) Filtration removes smaller particles	D) High quality water is always assured

Answer & Explanation Answer: D) High quality water is always assured

Explanation:

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Q:

The hardest natural substance is

A) Graphite	B) Diamond
C) Iron	D) Copper

Answer & Explanation Answer: B) Diamond

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Q:

Which leukocyte is responsible for antibody production?

A) Monocyte	B) T-Cells
C) B Lymphocyte	D) Basophil

Answer & Explanation Answer: C) B Lymphocyte

Explanation:

Leukocyte, commonly known as a white blood cell (WBC), is a major component in protecting the body against invading microorganisms and body cells with mutated DNA, and they clean up debris.

B Lymphocyte also called as B-Cells or plasma cells produces the antibodies or immunoglobulins that bind to specific foreign or abnormal components of plasma membranes. This is also referred to as humoral (body fluid) immunity.

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Q:

CMOS is a

A) Battery-powered memory chip	B) Basic input-output system
C) Storage device	D) Cache memory operating system

Answer & Explanation Answer: A) Battery-powered memory chip

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Q:

The study of human evolution indicates that all of us belong to a single species that evolved in

A) West Asia	B) Central Asia
C) Africa	D) America

Answer & Explanation Answer: C) Africa

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Q:

Which one of the following is the largest source of natural energy to humans?

A) Plants	B) Earth
C) Animals	D) Sun

Answer & Explanation Answer: D) Sun

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Q:

Who wrote 'Nyaya Sutra'?

A) Vyasa	B) Gautam
C) Kapila	D) Charaka

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