Questions

Q:

How many atoms are present in one molecule of Ozone?

A) 4 B) 1
C) 2 D) 3
 
Answer & Explanation Answer: D) 3

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Q:

Which of the following Phylum are also called flatworms?

A) Mollusca B) Chordata
C) Ctenophora D) Platyhelminthes
 
Answer & Explanation Answer: D) Platyhelminthes

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Q:

The Chola kingdom mostly ruled which region of India?

A) East B) West
C) North D) South
 
Answer & Explanation Answer: D) South

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Q:

Strait of Gibraltar connects which of the following?

A) Red Sea ­ Mediterranean Sea B) Red Sea ­ Arabian Sea
C) Atlantic Ocean ­ Mediterranean Sea D) Mediterranean Sea ­ Black Sea
 
Answer & Explanation Answer: C) Atlantic Ocean ­ Mediterranean Sea

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Q:

Which of the following is usually not an air­pollutant?

A) Hydrocarbons B) Sulphur dioxide
C) Carbon dioxide D) Nitrous oxide
 
Answer & Explanation Answer: D) Nitrous oxide

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Q:

Propyne and propene can be distinguished by

A) AgNO₃ in ammonia B) conc. H₂SO₄
C) dil. KMnO₄ D) Br₂ in CCl₄
 
Answer & Explanation Answer: A) AgNO₃ in ammonia

Explanation:

Propene, being an alkene, and propyne, being a alkyne, are distinguished using the common chemical tests namely ammoniacal silver nitrate or ammoniacal cuprous chloride. Ammoniacal silver nitrate is also called as Tollen's reagent.

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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:

On 24 October 2017, the Government of India announced a massive of ______ package to boost economy

A) Rs 7 lakh crore B) Rs 9 lakh crore
C) Rs 15 lakh crore D) Rs 5 lakh crore
 
Answer & Explanation Answer: B) Rs 9 lakh crore

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