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 Chemistry Questions

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Q:

Milk of Magnesia is used as a 

 

A) Laxative  B) Pain killer 
C) Sedative  D) Antibiotic
 
Answer & Explanation Answer: A) Laxative 

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Q:

Out of all known elements, the minimum number is of ______.

 

A) Metals   B) Non-metals  
C) Metalloids D) No option is correct
 
Answer & Explanation Answer: C) Metalloids

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Q:

Which type of reaction occurs when carbon burns in oxygen to give carbo dioxide?

 

A) Addition reaction B) Substition reaction
C) Combustion reaction D) Decomposition reaction
 
Answer & Explanation Answer: C) Combustion reaction

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Q:

Isobars are atoms of different chemical elements that have ______.

 

A) Same atomic number but different mass number B) Same mass number but different atomic number
C) Same mass number and same atomic number D) Different mass number and different atomic number  
 
Answer & Explanation Answer: B) Same mass number but different atomic number

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0 42838
Q:

Which one of the following statements would be INCORRECT to use?

 

A) An atom of a compound B) A mole of an element
C) A mole of a compound D) An atom of an element
 
Answer & Explanation Answer: A) An atom of a compound

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Q:

Which of the following statements is/are true or false?

 

Statements :

 

A) H2S burns in air to give H2O and SO2

B) The decomposition of Ferrous Sulphate into Fe2O3, SO2 and SO3 occurs in the presence of heat.

 

A) Statements A and B both are true B) Statement A is true, while B is false
C) Statements A and B are false D) Statement B is true, while A is false
 
Answer & Explanation Answer: A) Statements A and B both are true

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Q:

Which of the following statements are CORRECT?

 

I. Ethanol is a good solvent for organic compounds.

II. Boiling and melting points of ethanol are low with respect to water.

III. Ethanol is used tincture iodine

 

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: D) All I, II and III

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Q:

Factors that may influence enzyme activity?

 

A) pH B) Substrate concentration
C) Temperature D) All the above
 
Answer & Explanation Answer: D) All the above

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