NTSE Chemistry Acids Bases and Salts MCQs

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Acids Bases and Salts MCQ Questions NTSE Chemistry with Answers

 

Question: Which of the following represents acid-base pair for the equilibrium reaction ?

Chemistry carbon coal10

  • a) HCI, H2O              
  • b) HCI, H3O+       
  • c) HCI, CI- 
  • d) CI-, H2O

Answer: HCI, CI- 

 

Question: The strongest acid of the following is -

  • a) HCI
  • b) H2SO4  
  • c) HCIO4 
  • d) H3PO4

Answer: HCIO4 

 

Question: Acids are the substances that yield H+ ions in aqueous solutions while bases yield OH- ions. In a neutral solution -

  • a) There are no H+ ions.
  • b) There are no OH- ions.
  • c) There are neither H+ nor OH- ions.
  • d) H+ and OH- ions are present in very small but equal in number

Answer: H+ and OH- ions are present in very small but equal in number

 

Question: The reaction of water with ammonia is given by the following equation, in this reaction water acts as :

Chemistry carboncoal

  • a) Neutral
  • b) Base
  • c) Acid
  • d) Both acid and base

Answer: Acid


Question: Ionic theory of acid and bases was proposed by -

  • a) Lowry
  • b) Bronsted
  • c) Lewis
  • d) Arthenius

Answer: Arthenius


Question: The conjugate acid of NH2- is -           

  • a) NH3     

     

  • b) NH2OH  
  • c) NH4+ 
  • d) CIO4-

Answer: NH3     

 

Question: The strength of the acid depends on the -

  • a) Number of hydrogen atoms present in the molecules.
  • b) Density.
  • c) Oxygen content.
  • d) Concentration of hydrogen ions furnished by ionisation.

Answer: Concentration of hydrogen ions furnished by ionisation.


Question: According to Lewis concept, the acid is -

  • a) Proton acceptor.
  • b) Electron pair donor.
  • c) Electron pair acceptor
  • d) Proton donor.

Answer: Electron pair acceptor


Question: Which of the following could act as a Lewis acid but not Bronsted acid ?

  • a) HCI
  • b) H2SO4 
  • c) HSO3- 
  • d) SO3

Answer: SO3

 

Question: Which among the following is a Lewis acid ?

  • a) NaF
  • b) BF4  
  • c) NaCI
  • d) MgCI2

Answer: BF4  

 

Question: The pH of a solution is 3. When it’s pH changes to 6 then H+ ion concentration -

  • a) Increases three times.
  • b) Increases two times
  • c) Decrease 100 times
  • d) Decreases 1000 times.

Answer: Decreases 1000 times.


Question: At 800C, pure distilled water has H3O+ concentration equal to 1 × 10-6 mol L-1. The value of Kw at this temperature will be -           

  • a) 1 × 10-8      
  • b) 1 × 10-12   
  • c) 1 × 10-14    
  • d) 1 × 10-6

Answer: 1 × 10-12   

 

Question: What happens when dil. H2SO4 is added to baking soda ?

  • a) SO2 gas is evolved.    
  • b) Sodium sulphate is formed.
  • c) An acid salt is produced.
  • d) All of the above.

Answer: Sodium sulphate is formed.


Question: Bleaching powder is commercially called -

  • a) Chloride of lime only
  • b) Chlorinated lime only
  • c) Both
  • d) None

Answer: Both


Question: Which among the following is a Lewis acid ?

  • a) NaF
  • b) Nacl
  • c) MgCl2
  • d) BF4

Answer: BF4

 

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