Chemistry - Acids, Bases, Salts and Redox Reactions

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Question - 1

Consider the following statements about oxidation
It is the process which involves
1. removal of oxygen
2. addition of hydrogen
3. removal of an electropositive element.
4. addition of an electronegative element.
which of the above is/are false about reduction?

  • A Only 1
  • B 1 and 2
  • C 3 and 4
  • D All of these

Question - 2

A redox reaction is

  • A proton transfer reaction
  • B ion combination reaction
  • C a reaction is solution
  • D electron transfer reaction

Question - 3

What is the pH of an aqueous solution having OH- ions concentration equal to 10-2 mol L-1 ?

  • A 2
  • B 12
  • C 10
  • D 6

Question - 4

Starch iodide paper is used to test for the presence of

  • A iodine
  • B iodine iron
  • C oxidising agent
  • D reducing agent

Question - 5

Consider the following statements
It is the process which involves
1. addition of oxygen
2.removal of hydrogen
3. addition of an electronegative element
4. removal of an electropositive element
Which of the above are correct about oxidation?

  • A 1 and 2
  • B 2 and 3
  • C 2, 3 and 4
  • D all of these

Question - 6

What is the pH of pure water?

  • A 1
  • B 7
  • C 5
  • D 12

Question - 7

The pH of fresh ground water slightly decreases upon exposure to air because

  • A carbon dioxide from air is dissolved in the water
  • B Oxygen from air is dissolved in the water
  • C the dissolved carbon dioxide of the ground water escapes into air
  • D the dissolved oxygen of the ground water escapes into air

Question - 8

Match Column I with Column II

Column I Column II
A. Tartaric acid 1. Red ants
B. Formic acid 2. Grapes
C. Uric acid 3. Apples
D. Maleic acid 4. Urine of mammals
  • A A B C D 2 1 4 3  
  • B A B C D 1 4 3 2  
  • C A B C D 4 3 2 1  
  • D A B C D 3 2 1 4  

Question - 9

Which of the following reducing agents can also act as an oxidising agent?

  • A H2
  • B H2S
  • C SO2
  • D HI

Question - 10

Which of the following oxides is a neutral oxide?

  • A NO2
  • B CO2
  • C CaO
  • D CO