Basic Concepts of Chemistry- 03

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Q1. Calculate the number of Moles of NaOH present in 200 g *

1 point

0.5 moles

5 moles

2 moles

1.1 moles

Q2. The percentage of Oxygen is C6H12O6 is *

1 point

60.72

21.67

48.00

53.33

Q3. How many mL of water must be added to 200 mL of 0.65 M HCL to dilute the solution to 0.20 M *

1 point

650 mL

450 mL

400 mL

350 mL

Q4. Calculate the number of Ca atoms in 50 g of CaCO3 *

1 point

3.011 x 10^22

6.022 x 10^23

3.011 x 10^23

6.022 x 10^20

Q5. What will be the molarity of a solution, which contains 98 g of H2SO4 per 500 mL? *

1 point

4 mol/L

2 mol/L

20 mol/L

0.2 mol/L

Q6. The number of Gram molecules of CO in 6.02 × 10^24 CO molecules *

1 point

01 gms

5 gms

10 gms

20 gms

Q7. Which of the following has the largest number of atoms *

1 point

1g of Cu

0.5 gm-atoms of Cu

0.635 g Cu

0.25 moles of Cu atoms

Q8. A gaseous hydrocarbon gives upon combustion 0.72 g of water and 3.08 g of CO2. The empirical formula of the hydrocarbon is *

1 point

C2H4

C6H14

C7H8

C5H8

Q9. The system that contains the maximum number of atoms is *

1 point

4 gms He

8 gms O2

1 gms H2

4.25 gms NH3

Q10. What will be the molality of the solution containing 4.9 g of H2SO4 in 200 g of water? *

1 point

0.125 m

0.5 m

0.25 m

1 m

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