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Q:

Which of the following statements is wrong with regard to strong acids?

A) Strong acids react very rapidly with other substances (such as metal carbonates and metal hydrogen carbonates) B) Hydrochloric acid, Sulphuric acid and Nitric acid are strong acids
C) Acids are those chemical substances that have a salty taste D) All minerals acids are strong acids
 
Answer & Explanation Answer: C) Acids are those chemical substances that have a salty taste

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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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Q:

The number of electrons that can be accommodated in the M shell is

A) 18 B) 8
C) 2 D) 32
 
Answer & Explanation Answer: A) 18

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Q:

___ is used in yellow lamp street lights.

A) Neon B) Nitrogen
C) Phosphorous D) Sodium
 
Answer & Explanation Answer: D) 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:

In the Modern Periodic Table, a zig-zag line separates

A) metals from halogens B) non-metals from metalloids
C) metals from non-metals D) metals from metalloids
 
Answer & Explanation Answer: C) metals from non-metals

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Q:

Which of the following classifications is based on atomic numbers?

A) Mendeleev's Periodic Table B) Modern Periodic Table
C) Newlands Law of Octaves D) Dobereiner's Law of Triads
 
Answer & Explanation Answer: B) Modern Periodic Table

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