Chemistry Questions

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:

Which of the following is not correct with reference to Bio-sand Water Filter?

A) It deactivates or kills pathogens B) Sedimentation removes larger particles
C) Filtration removes smaller particles D) High quality water is always assured
 
Answer & Explanation Answer: D) High quality water is always assured

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Q:

What are stars primarily made of?

A) Oxygen and Hydrogen B) Hydrogen and Carbon
C) Hydrogen and Helium D) Oxygen and Helium
 
Answer & Explanation Answer: C) Hydrogen and Helium

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Q:

The pH value increase from 7 to 14 represents a

A) decrease in H+ ion concentration B) decrease in OH- ion concentration
C) increase in OH- ion concentration D) increase in H+ ion concentration
 
Answer & Explanation Answer: C) increase in OH- ion concentration

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Q:

Which of the following is not the properties of an ionic compound?

A) Soluble in water and insoluble in petrol B) High melting and boiling points
C) Low melting and boiling points D) Solid and hard
 
Answer & Explanation Answer: C) Low melting and boiling points

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Q:

What is C12H22O11 also known as

A) Sand B) Sugar
C) Salt D) Clay
 
Answer & Explanation Answer: B) Sugar

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Q:

The number of neutrons present in a nitrogen atom is ___.

A) 14 B) 7
C) 11 D) 5
 
Answer & Explanation Answer: B) 7

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Q:

Which of the following is the most common kidney stone-forming compound?

A) Calcium oxalate B) Magnesium oxide
C) Sodium bicarbonate D) Magnesium citrate
 
Answer & Explanation Answer: A) Calcium oxalate

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