CBSE
Multiple Choice QuestionsThe number of water molecules is maximum in
18 molecules of water
1.8 g of water
18 g of water
18 g of water
What is the mass of precipitate formed when 50 mL of 16.9% solution of AgNO3 is mixed with 50 mL of 5.8% NaCl solution?
(Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5)
28 g
3.5 g
7 g
7 g
How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
0.044
0.333
0.011
0.011
10 g of hydrogen and 64 of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be
2 mol
3 mol
4 mol
4 mol
What is the mole fraction of the solute in a 1.00 m aqueous solution?
0.177
1.770
0.0354
0.0354
20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (Atomic weight of Mg =24)
75
96
60
60
Which has the maximum number of molecules among the following?
44 g CO2
48 g O3
8 g H2
8 g H2
An Organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be
CH3O
CH2O
CHO
CHO
The number of atoms in 0.1 moles of a triatomic gas is (NA = 6.02 x 1023 mol-1)
6.026 x 1022
1.806 x 1023
3.600 x 1023
3.600 x 1023
Number of moles of MnO4- required to oxidies one mole of ferrous oxalate completely in acidic medium will be
0.6 mole
0.4 mole
7.5 mole
7.5 mole
