Elements and Compounds Notes App | Class 7 Science Notes e-Book PDF | 8
Class 7 Science MCQs (Grade 7) From Textbook

Class 7 Science MCQs – Practice Test 8 (Chapter 7)

Elements and Compounds Notes Questions with Answers PDF Download – Test 8

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Elements and Compounds MCQs – Practice Test 8 PDF Download

MCQ 36: The process which involves in breaking down the element by passing electricity through it is called:

  1. electrolysis
  2. hydrolysis
  3. photolysis
  4. photosynthesis

MCQ 37: Chinese thought that the number of elements were:

  1. 3
  2. 4
  3. 2
  4. 5

MCQ 38: Low densities, low melting, low boiling point and poor conductivity are found in:

  1. metals
  2. non metals
  3. alkalis
  4. metalloids

MCQ 39: Air ships and balloons use gas called:

  1. oxygen
  2. hydrogen
  3. helium
  4. neon

MCQ 40: A compound which yields in black solid, copper oxide and colorless gas carbon dioxide on heating, is:

  1. copper carbonate
  2. iron sulfide
  3. sodium chloride
  4. copper chloride

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