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Q:

Binomial Nomenclature was founded by

A) Charles Darwin B) Robert Nucleus
C) Carl Linnaeus D) Lamarck
 
Answer & Explanation Answer: C) Carl Linnaeus

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Q:

Which of the following fuel has maximum calorific value?

A) Petrol B) Coal
C) Wood D) Cow dung  
 
Answer & Explanation Answer: A) Petrol

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Q:

Which of the following gases are responsible for the greenhouse gas effect on Earth?

A) Water Vapour and Carbon dioxide B) Carbon dioxide and Nitrogen
C) Oxygen and Methane D) Ozone and Methane
 
Answer & Explanation Answer: A) Water Vapour and Carbon dioxide

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Q:

The amount of BaSO4 formed on mixing an aqueous solution of 2.08 gm of BaCl2 and excess of dilute H2SO4 is ___.

(atomic weights : Ba = 137, Cl = 35.5, S = 32, O = 16)

A) 2.33 g B) 2.08 g
C) 23.3 g D) 1.04 g
 
Answer & Explanation Answer: A) 2.33 g

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Q:

The pH of a solutiion is 3. When its pH changes to 6, then H+ ion concentration

A) increases 2 times B) increases 3 times
C) decreases 1000 times D) decreases 100 times
 
Answer & Explanation Answer: C) decreases 1000 times

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Q:

Which one of the following is a bad Thermal Conductor?

A) Aluminium B) Copper
C) Glass D) Silver
 
Answer & Explanation Answer: C) Glass

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Q:

Why does carbon tetrachloride have no dipole moment?

A) Because of same size of carbon and chlorine atoms B) Because of regular tetrahedral structure
C) Because of planar structure D) Because of similar electron affinities of carbon and chlorine
 
Answer & Explanation Answer: B) Because of regular tetrahedral structure

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Q:

The chemical formula of Sodium Carbonate is

A) Na3CO2 B) Na2CO
C) NaCO3 D) Na2CO3
 
Answer & Explanation Answer: D) Na2CO3

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