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 Chemistry Questions

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Q:

Which scientist established the Law of Octaves?

A) John Newlands B) Antoine Lavoisier
C) Alfred Nobel D) Marie Curie
 
Answer & Explanation Answer: A) John Newlands

Explanation:

Law of Octaves states that "If the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements." That is every 8th element have the same physical and chemical properties. This was established by the British scientist John Newlands in the year 1865.

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Q:

Which type of bond is found in sodium bromide?

A) Ionic B) Covalent
C) Polar covalent D) None of the above
 
Answer & Explanation Answer: A) Ionic

Explanation:
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Q:

An atom that loses or gains electrons is called

A) Proton B) Ion
C) Isotope D) Neutron
 
Answer & Explanation Answer: B) Ion

Explanation:

An atom that loses or gains electrons is called as ion. Gaining of electron is negative charge and is called as Anion and lossing of eectron is called Cation.

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Q:

Chlorine gas is used in the manufacture of:

A) Baking powder B) Bleaching powder
C) Baking soda D) Washing soda
 
Answer & Explanation Answer: B) Bleaching powder

Explanation:
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Q:

Brownish film formed on iron when left in open is called?

A) Dust B) Shovel
C) Spade D) Rust
 
Answer & Explanation Answer: D) Rust

Explanation:
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Q:

........... as is used as an illuminating gas.

A) Methyl B) Propane
C) Butene D) Ethyne
 
Answer & Explanation Answer: B) Propane

Explanation:
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Q:

The (O-H) bond in CH3OH is _____.

A) polar covalent B) ionic
C) non polar covalent D) cationic
 
Answer & Explanation Answer: A) polar covalent

Explanation:
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Q:

Kaolin is chemically classified as

A) Argillaceous rock B) Silicious rock
C) Metamorphic rock D) Calcareous rock
 
Answer & Explanation Answer: A) Argillaceous rock

Explanation:

Kaolin is chemically classified as Argillaceous rock.

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