Basic Concepts Test 3

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A test from chapter 1 i.e Basic Concepts of Chemsitry part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. Efficiency of chemical reaction can be checked by calculating

A) amount of limiting reactant
B) amount of the reactant in excess
C) amount of the product formed
D) amount of the reactant unused

2. A limiting reactant is one

A) which is present in least amount
B) which produces minimum no. of moles of product
C) which produces maximum no. of moles of product
D) does not effect the amount of product

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

A) reactants
B) products
C) Reactants and Products
D) all of above

4. 500 cm3 of H2 gas at STP contradictions of hydrogen

A) 6.02 x 10^23
B) 3.01 x 10^22
C) 2.68 x 10^22
D) 1.34 x 10^22

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

A) 0.01 mole of HCl
B) 0.0050 mole of H2SO4
C) 0.000334 moles of H3PO4
D) all above

6. The Avogadro’s number is

A) 6.02 x 10^24
B) 6.02 x 10^-24
C) 6.02 x 10^-23
D) 6.02 x 10^23

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

A) 0.100 2 moles of HCl
B) 0.051 moles of H2SO4
C) 0.0334 moles of H3PO4
D) All of the above

8. A sample of pure matter is

A) element
B) compound
C) substance
D) mixture

9. nm stands for

A) Newton meter
B) Nanometer
C) Newton square meter
D) None

10. 0.1 mole of Na3PO4 completely dissociates in water to produce Na+

A) 6.02 x 1022
B) 6.02 x 1023
C) 1.806 x 1023
D) 1.806 x 1022