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 Chemistry Questions

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Q:

What is the position of metallic ion and non-metallic ion in a chemical formula?

 

A) Metal ion at second position B) Non-metal ion at first position
C) Metal ion at first and non-metal ion at second position D) No option is correct
 
Answer & Explanation Answer: C) Metal ion at first and non-metal ion at second position

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Q:

Glass is a.........mixture of metallic...........

A) homogenous, sulphates B) homogenous, silicates
C) heterogenous, carbonates D) heterogenous, nitrates
 
Answer & Explanation Answer: B) homogenous, silicates

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Q:

___ is the number of shells for elements of the 3rd period.

 

A) 1 B) 0
C) 2 D) 3
 
Answer & Explanation Answer: D) 3

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Q:

Which is the heaviest metal among the following?

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

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Q:

Atoms Are Composed Of

A) Electrons and Protons B) Protons and Nuclei
C) Only Electrons D) Electrons and Nuclei
 
Answer & Explanation Answer: D) Electrons and Nuclei

Explanation:

Atoms are composed of Electrons, protons and Neutrons. Protons and Neutrons together called as Nuclei.

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Q:

The enzyme in whosepresence glucose and fructose are converted into alcohol is 

A) Diastase B) Maltase
C) Invertase D) Zymase
 
Answer & Explanation Answer: D) Zymase

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Q:

Lime water becomes white due to which gas?

 

A) CO2 B) O2
C) NO2   D) N2
 
Answer & Explanation Answer: A) CO2

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Q:

Iron rusting, chemical or physical change

A) Chemical B) Physical
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) Chemical

Explanation:

In rusting the Iron ore make a chemical reaction with the oxygen in the presence of water and environmental or atmospheric moisture to produce an Iron oxide. Iron oxide is otherwise called as rust.


The rusting of iron is a chemical change because it is two substances reacting together to make a new substance.

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