NCERT Class-9 Science Solutions: Chapter 3-Atoms And Molecules Part 12

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Question 46:

  1. In this crossword puzzle (Fig), names of 11 elements are hidden. Symbols of these are given below. Complete the puzzle.

    1. Result for crossword puzzle (Q)

      Crossword Puzzle (Q)

      Result for crossword puzzle (Q)

  2. Identify the total number of inert gases, their names and symbols from this cross word puzzle.

Answer:

Result for crossword puzzle (A)

Crossword Puzzle (A)

Result for crossword puzzle (A)

Question 47:

Write the formula for the following and calculate the molecular mass for each one of them.

  1. Caustic potash

  2. Baking powder

  3. Lime stone

  4. Caustic soda

  5. Ethanol

  6. Common salt

Answer: