Basic Concepts Set 3 - ilmijazeera

Results

#1. 0.1 mole of Na3PO4 completely dissociates in water to produce Na+

6.02 x 1022

6.02 x 1023

1.806 x 1023

1.806 x 1022

#2. Efficiency of chemical reaction can be checked by calculating

amount of limiting reactant

amount of the reactant in excess

amount of the product formed

amount of the reactant unused

#3. A limiting reactant is one

which is present in least amount

which produces minimum no. of moles of product

which produces maximum no. of moles of product

does not effect the amount of product

#4. Stoichiometry is the branch of chemistry which deals with the study of quantitative relationship among the various

reactants

products

Reactants and products

all of above

#5. 500 cm3 of H2 gas at STP contradictions of hydrogen

6.02 x 1023

3.01 x 1022

2.68 x 1022

1.34 x 1022

#6. Largest number of H+ ions are produced by complete ionization of

0.01 mole of HCl

0.0050 mole of H2SO4

0.000334 moles of H3PO4

all above

#7. The Avogadro’s number is

6.02 x 1024

6.02 x 10–24

6.02 x 10–23

6.02 x 1023

#8. The largest number of H+ are produced by complete ionization of

0.100 2 moles of HCl

0.051 moles of H2SO4

0.0334 moles of H3PO4

All of the above

#9. A sample of pure matter is

element

compound

substance

mixture

#10. nm stands for

Newton meter

Nanometer

Newton square meter

none of the above

Finish

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Results

#1. 0.1 mole of Na3PO4 completely dissociates in water to produce Na+

#2. Efficiency of chemical reaction can be checked by calculating

#3. A limiting reactant is one

#4. Stoichiometry is the branch of chemistry which deals with the study of quantitative relationship among the various

#5. 500 cm3 of H2 gas at STP contradictions of hydrogen

#6. Largest number of H+ ions are produced by complete ionization of

#7. The Avogadro’s number is

#8. The largest number of H+ are produced by complete ionization of

#9. A sample of pure matter is

#10. nm stands for