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Middle 6
Chemistry

Atom, element and compound

tshewangnamgay477
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Question 1

Multiple Choice

Symbol for gold

  • Au
  • Al
  • Ag

Question 2

Multiple Choice

Which one is acidic in nature?

  • Tooth paste
  • Soda
  • Lemon juice

Question 3

Multiple Choice

Litmus paper turns ............. in acidic solution

  • Blue
  • Red
  • Green

Question 4

Multiple Choice

Which one is the advantage of soft water?

  • It makes our skin soft
  • More soaps are wasted while washing
  • Good for bones and teeth

Question 5

Multiple Choice

Soluble solids can be separated from a solution by........

  • Hand picking
  • Separating funnel
  • Evaporation

Question 6

Multiple Choice

What gas is used during photosynthesis?

  • Oxygen
  • Carbon dioxide
  • Hydrogen

Question 7

Multiple Choice

The taste of the substance contains acid will be..........

  • Sour
  • Bitter
  • Sweet

Question 8

Multiple Choice

Which one best explains about physical change?

  • It is irreversible change
  • No new substance are formed
  • We cannot get back it's original identity

Question 9

Multiple Choice

Which minerals are present in hard water?

  • Magnesium and calcium
  • Sodium ions
  • Lime

Question 10

Multiple Choice

What is molecular formula for the compound X if it has 3 atoms of A, 2 atoms of B and 6 atoms of C?

  • A6B2C3
  • A3B2C6
  • A2B6C3
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