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 Chemistry Questions

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Q:

A change in which a substance undergoes a change in its physical properties is called _____________.

A) Chemical Properties B) Physical Properties
C) Chemical Change D) Physical Change
 
Answer & Explanation Answer: D) Physical Change

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Q:

Who was the first man to go to space?

A) Yuri Gagarin B) Yuri Rontgen
C) Yuris Cui D) Yuris Mahatinn
 
Answer & Explanation Answer: A) Yuri Gagarin

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Q:

The upper part of the heterosphere is composed almost completely of which gas?

A) Ozone B) Nitrogen
C) Oxygen D) Hydrogen
 
Answer & Explanation Answer: D) Hydrogen

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Q:

How many elements are present in the group of the 18th Modem Periodic Table?

A) 5 B) 2
C) 6 D) 7
 
Answer & Explanation Answer: D) 7

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Q:

The common name of hydrogen peroxide is

A) borax B) bleach (liquid)
C) baking soda D) gypsum
 
Answer & Explanation Answer: B) bleach (liquid)

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Q:

The hazardous component in most antifreeze is

A) Ethane alcohol B) Ethylene Glycol
C) Ehtylene D) Ethene
 
Answer & Explanation Answer: B) Ethylene Glycol

Explanation:

Ethylene Glycol is an antifreeze is an additive which lowers the freezing point of a water-based liquid and increases its boiling point. 

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Q:

Which of the following elements has the lowest melting point?

A) Xenon B) Iodine
C) Barium D) Magnesium
 
Answer & Explanation Answer: A) Xenon

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Q:

When Granite rocks get metamorphosed, they form

A) Quartzite B) Gneiss
C) Marble D) Slate
 
Answer & Explanation Answer: B) Gneiss

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