Q:

The scientific name of human being is?

A) Homo Nigrum	B) Melongena Sapiens
C) Homo Sapiens	D) Tigris Solanum

Answer & Explanation Answer: C) Homo Sapiens

Explanation:

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Q:

The chemical properties of an element depend upon

A) the number of isotopes of the element	B) the mass number of the element
C) the total number of neutrons in the element	D) the number of electrons in the outermost shell of the element

Answer & Explanation Answer: D) the number of electrons in the outermost shell of the element

Explanation:

Chemical properties of an element depend on the number and the configuration of their (valence) electrons.

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Q:

Which of the following statements is INCORRECT?

A) Solids have definite volume	B) solids are rigid
C) Solids have indefinite shape	D) Solids are almost incompressible

Answer & Explanation Answer: C) Solids have indefinite shape

Explanation:

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Q:

The number of free electrons in the outermost shell of carbon atoms in diamand is

A) zero	B) two
C) four	D) three

Answer & Explanation Answer: A) zero

Explanation:

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Q:

Which of the following allotropes of Carbon is used as a reducing agent in metallurgy?

A) Carbon Black	B) Graphite
C) Charcoal	D) Coke

Answer & Explanation Answer: D) Coke

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Q:

Which one of the following statements is correct?

A) The oxidation number for hydrogen is always zero.	B) The oxidation number for hydrogen is always + 1.
C) The oxidation number for hydrogen is always -1.	D) Hydrogen can have more than one oxidation number.

Answer & Explanation Answer: D) Hydrogen can have more than one oxidation number.

Explanation:

Hydrogen has two possible oxidation numbers: +1 and -1.

-1 in case of hydrides.

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Q:

Which of the following is a major river in Bangladesh which is also the main distributary of the Ganges?

A) Gandak	B) Kosi
C) Gomati	D) Padma

Answer & Explanation Answer: D) Padma

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Q:

In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.

Fourteen kilometres ______ not a short distance, to reach to my office daily.

A) are	B) has
C) have	D) is

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