Chemistry Questions

Q:

The elements known as primary nutrients for plants

A) Nitrogen, Phosphorus and Potassium B) Nitrogen, Oxygen and Silicon
C) Potassium, Boron and Nitrogen D) Nitrogen, Phosphorus and Iron
 
Answer & Explanation Answer: A) Nitrogen, Phosphorus and Potassium

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Q:

____ is the most electropositive and ___ is the most electronegative element of the third period of modern periodic table.

 

A) Sodium, Potassium B) Magnesium, Aluminium
C) Sodium, Chlorine D) Aluminium, Chlorine
 
Answer & Explanation Answer: C) Sodium, Chlorine

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Q:

Chemical formula for sulphurous acid is:

A) H2SO4 B) H2SO3
C) H3SO3 D) H3SO4
 
Answer & Explanation Answer: B) H2SO3

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Q:

Haemoglobin has the highest affinity with which of the following?

A) SO2 B) CO2
C) CO D) NO2
 
Answer & Explanation Answer: C) CO

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Q:

Which one of the following is an insulator?

A) copper B) wood
C) mercury D) aluminium
 
Answer & Explanation Answer: B) wood

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Q:

Besides CO2, the other green house gas is

A) CH4 B) N2
C) Ar D) O2
 
Answer & Explanation Answer: A) CH4

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Q:

What is the base of the Octal Numeral System?

A) 8 B) 16
C) 32 D) 64
 
Answer & Explanation Answer: A) 8

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Q:

Why is Carbon Monoxide a pollutant ?

A) Reacts with haemoglobin B) Makes nervous system inactive
C) It reacts with Oxygen D) It inhibits glycolysis
 
Answer & Explanation Answer: A) Reacts with haemoglobin

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