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Q:

Non-metal oxides are usually

A) acidic B) amphoteric
C) neutral D) basic
 
Answer & Explanation Answer: A) acidic

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Q:

Which of the following scientists gave the law that governs the force of attraction/repulsion between two charged particles?

A) Charles Dufay B) Michael Faraday
C) Archimedes D) Charles Coulomb
 
Answer & Explanation Answer: D) Charles Coulomb

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Q:

In a water molecule, the ratio of mass of Hydrogen to the mass of Oxygen is always:

A) 8:1 B) 7:1
C) 1:7 D) 1:8
 
Answer & Explanation Answer: D) 1:8

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Q:

Which of the following scientists had done some calculations for the fifth state of matter?

A) Satyendra Nath Bose B) CV Raman
C) Vikram Sarabhai D) Homi Bhabha
 
Answer & Explanation Answer: A) Satyendra Nath Bose

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Q:

Name the Russian chemist who stated that the properties of elements are a periodic function of their atomic masses?

A) Markovnikov B) Zelinsky
C) Mendeleev D) Zaitsev
 
Answer & Explanation Answer: C) Mendeleev

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Q:

What was the element used in traditional thermometers which is highly toxic in nature?

A) Carbon B) Mercury
C) Arsenic D) Cadmium
 
Answer & Explanation Answer: B) Mercury

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Q:

Which of the below options is called a laughing gas?

A) N2O B) CO2
C) H2O D) SO2
 
Answer & Explanation Answer: A) N2O

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Q:

Which one of the following is lyophilic colloid?

A) Gold sol B) Smoke
C) Cloud D) Starch aqueous solution
 
Answer & Explanation Answer: D) Starch aqueous solution

Explanation:

Starch aqueous solution is a lyophilic colloidal solution.

 

Lyophilic colloids are liquid loving colloids.  When these colloids are mixed with suitable liquid high force of attraction exists between colloidal particles and liquid.

 

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