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 Chemistry Questions

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Q:

By how many atomic mass units do subsequent members of homologous series differ?

A) 26 B) 32
C) 20 D) 14
 
Answer & Explanation Answer: D) 14

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Q:

Isobars have _______.

A) Same mass numbers but different atomic numbers B) Different mass numbers but same atomic numbers
C) Same mass and atomic numbers D) Different mass and atomic numbers
 
Answer & Explanation Answer: A) Same mass numbers but different atomic numbers

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Q:

____ is the process in which acids and bases react to form salts and water.

A) Distillation B) Electrolysis
C) Neutralisation D) Hydrolysis
 
Answer & Explanation Answer: C) Neutralisation

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Q:

If a solution turns blue litmus red, its pH is likely to be

A) 7 B) 8
C) 9 D) 6
 
Answer & Explanation Answer: D) 6

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Q:

Which of the following meals is NOT obtained by reduction using carbon?

A) Copper B) Sodium
C) Iron D) Zinc
 
Answer & Explanation Answer: B) Sodium

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Q:

Least distance of distinct vision for normal eye is

A) 15 cm B) 20 cm
C) 25 cm D) 30 cm
 
Answer & Explanation Answer: C) 25 cm

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Q:

Which of the following metals does NOT react with Oxygen even at a high temperature?

A) Silver B) Lead
C) Aluminium D) Zinc
 
Answer & Explanation Answer: A) Silver

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Q:

What are transition elements?

A) Elements whose two outermost shells are incomplete B) Elements which possess properties of both, metals and non-metals
C) They have eight electrons in the outermost shell D) Elements whose three outermost shells are incomplete
 
Answer & Explanation Answer: A) Elements whose two outermost shells are incomplete

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