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Q:

Sphalerite is an ore/mineral of

A) Mercury B) Molybdenum
C) Silver D) Zinc
 
Answer & Explanation Answer: D) Zinc

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Q:

Except Helium, all noble gases have how many electrons in the outermost shell?

A) 4 B) 8
C) 6 D) 10
 
Answer & Explanation Answer: B) 8

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Q:

Which of the following is NOT a property of acids?

A) Acids form salts with bases B) Acids have bitter taste
C) Acids have sour taste D) Acids turn blue litmus red
 
Answer & Explanation Answer: B) Acids have bitter taste

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Q:

Which of the following is an amphoteric oxide?

A) Aluminium oxide B) Iron oxide
C) Magnesium oxide D) Carbon dioxide
 
Answer & Explanation Answer: A) Aluminium oxide

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Q:

Which of the following elements was the last element in Newland's Law of Octaves?

A) Thorium B) Hydrogen
C) Rubidium D) Bromine
 
Answer & Explanation Answer: A) Thorium

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Q:

The gas evolved when sodium carbonate reacts with hydrochloric acid is

A) Hydrogen B) Chlorine
C) Hydrogen Chloride D) Carbon dioxide
 
Answer & Explanation Answer: D) Carbon dioxide

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Q:

Which of the following is called Aurum?

A) Bronze B) Gold
C) Silver D) Copper
 
Answer & Explanation Answer: B) Gold

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Q:

Ammonium nitrate, on thermal decomposition, produces :

A) NH3 and NO2 B) NH3 and NO
C) N2 and H2O D) N2O and H2O
 
Answer & Explanation Answer: D) N2O and H2O

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