Punjab 9th Class Chemistry Chapter 6 Solutions 9th Class Punjab

5
• Chemistry
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Question 1 of 10

Chemistry

1. The maximum amount of sodium acetate that dissolves in 100gof water at 0°C is 119g and 170g of sodium acetate in 100g of water at 0°C, the resulting solution would be:

 

Unsaturated

Saturated

Supersaturated

1M

Question 1 of 10

Question 2 of 10

2. How many moles of sodium atoms are present in 2.3g Na?

 

1

1.5

0.1

0.15

Question 2 of 10

Question 3 of 10

3. What is the mass of 5 moles of hydrogen gas?

 

5g

5.04g

10.08g

1.008g

Question 3 of 10

Question 4 of 10

4. How many atoms are there in 28g of nitrogen gas?

2

1

6.022 x 10²³

12.044 x 10²³

Question 4 of 10

Question 5 of 10

5. How many atoms are there in 0.1 mole of carbon?

6.022 x 10²³

6.022 x 10²²

6.022 x 10²⁴

6.022 x 10²¹

Question 5 of 10

Question 6 of 10

6. A solution of NaOH has a concentration of 4g/dm³. What is the mass of NaOH contained in 250cm³ of this solution?

40g

20g

1g

2g

Question 6 of 10

Question 7 of 10

7. Which of the following solution is more dilute?

 

1M

2M

0.1M

0.009M

Question 7 of 10

Question 8 of 10

8. A solution of NaOH contains 20g of this compound in 2dm³ of solution. What is the molarity of this solution?

2M

1M

0.25M

0.5M

Question 8 of 10

Question 9 of 10

9. Which quantity is the same for one mole of hydrogen gas and one mole of water?

mass

number of atoms

number of molecules

number of gran atomic mass

Question 9 of 10

Question 10 of 10

10. If one mole of Na contains x atoms of sodium, what is the number of moles contained in 46g of sodium?

 

x

2

2x

1.5x

Question 10 of 10

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