SAT - Science - Chemistry - Atoms and Molecules

Question - 1

Mass of 3 moles of carbon is

  • A 12 g
  • B 24 9
  • C 36 g
  • D 18 9

Question - 2

The number of moles of magnesium present in 96 g of magnesium is (Atomic mass of Mg= 24)

  • A 1
  • B 2
  • C 3
  • D 4

Question - 3

The number of Na atoms present in 23 g Na metal is

  • A 23
  • B 22 x 6.022  x 1023
  • C 6.022 x 1023
  • D 0.5 x 6.022 x 1023

Question - 4

Volume of any gas at STP is

  • A 11.2 L
  • B 22.7 L
  • C 2.27 L
  • D 0.227 L

Question - 5

The number hydrogen atoms in 2 g of hydrogen is

  • A 2 x 6.022 x 1023
  • B 6.022 x 1023
  • C 2
  • D 1

Question - 6

How many moles of carbon dioxide are there in 44g CO2

  • A 44
  • B 22
  • C 1
  • D 4.4

Question - 7

How many molecules of H2O are there in 36 9g of H20?

  • A 1
  • B 2
  • C 1 X 6.022 X 1023
  • D 2 X 6.022 X 1023

Question - 8

Equivalent mass of H2SO4 is

  • A 98
  • B 49
  • C 9.8
  • D 4.9

Question - 9

What is the mass of 2 moles of HCI?

  • A 36.5 g
  • B 73 g
  • C 3.65 g
  • D 7.3 g

Question - 10

80 g of NaOH is dissolved in 1 litre of water. The molarity of NaOH solution is

  • A 0.1 M
  • B 0.2 M
  • C 1 M
  • D 2 M
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