Trivia Quiz On Chemical Reactions!

1. The formular for the ionic compound of Ca+2 and N-3 is

CaN

Ca2N3

Ca3N2

Ca3N

2. Which of the following is not an SI base unit

Kg

Meter

Degree celsius

Mole

3. In terms of the "Collision Theory of Chemical Kinetics", the rate of a chemical reaction is proportional to:

The change in free energy per second.

The change in temperature per second.

The number of collisions per second.

The number of product molecules.

4. Which of the following statements is true for a fast reaction

The values of the rate constant and the half-life are both large

The values of the rate constant and the half-life are both Small

The values of the rate constant is small and the half-life is large

The values of the rate constant is large and the half-life is small

5. Which of the following possesses the greatest concentration of hydroxide ion?

A solution with a pH of 3.0

91 X 10-4 M solution of HNO3

A solution with a pOH of 12.0

Water

6. Hich of tge following cant act as lewis base ?

Cl-

NH3

Cr+3

CN-

7. What is the half life for a reaction assuming first order kinetics if 75% of a reaction decomposesi in 60 minutes

21 min

15 min

90 min

30 min

8. The conjugate base of OH- is

O2

O-

H2O

O-2

9. The pOH of a solution that contains 1.94x10^-10 M H3O+ at 25 °C is

1.94

4.29

7.00

9.71

10. What is the overall order of the reaction of No with cl2

1

1.5

3

22

11. Calculate the concentration of a solution formed when15.0 ml of 600 M HCl are diluted with 25 ml of water

0.150

0.240 M

2.25 M

3.60 M

12. Consider the following reaction: The reaction is known to be second order with k 0.80 L/mol s. If you start with a concentration of 0.086 molVL of NOBr, what will be its concentration after 22 seconds?

2.0 x 10^-9 mol/L

5.4 x 10^-2 mol/L

3.4 x 10^-2 mol/L

8.7x 10^-1 mol/L

13. A solution containing 100g unknown liquid and 900g water has a freezing point of -3.33C given Kf= 1.86 C/m for water , the molar mass of the unknown liquid is

69.0

333

619

161

62.1

14. A 0.14 M HNO2 solution is 5.7% ionized calculate the H+ ion concentration

8* (10^-3) M

0.057 M

0.13 M

0.14 M

15. What is the concentration of A-ion in a 0.10M H2O

8 * (10^-5)

7.5*(10^-5)

1.6*(10^-12)

0.10

16. Which of the following 0.1 M solutions would have a Ph of 7 ?

NaOCl

Kcl

NH4 l

Ca(OAC)2

None of these

17. How many grams dons 4.00 moles of H2O weigh?

4.00 g

4.50 g

18.0 g

72.0 g

18. Determine the freezing point of a 0.25 m solution of glucose in water ( kf for water is 1.86 c/m )

0.93 C

-0.93 C

0.46 C

-0.46 C

19. What is the concentration of hydroxide ions in a solution with Ph=4.282?

4.282 M

9.718 M

1.92 * (10^-10)

5.22* (10^-5)

1.66* (10^4) M

20. The correct order for decreasing atomic radius of the 5 atoms Cs ,Ba , Cl , Br, I is

I>Br>cl>Cs>Ba

Ba>Cs>I>Br>Cl

Cs>Ba>I>Br>Cl

Ba>Cs>l>Br>Cl

21. Which of the following rafe lows is consistent with these data

Rate = k {Na}

Rate = k {Na} {Cl2}^2

Rate =k{Na} {Cl2}

Rate = k{Na}^2 Cl2

22. Calculate the Ph in a 0.10 MH2A solution

0.10

11.45

4.0

2.55

23. Calculate the K5 for an unknown HF given that a solution of 0.10 M HF has a pH oIIl.9?

7.9x10^6

6.31x10^2

6.2x10^-18

1.6x10^-17

24. What is the density of CCl4 molar mass 154 g/mol vapor at 714 torr and 125 C

4.43 g/L

0.226 g/l

0.443 g/l

2.26 g/L

25. When solution A 0.1 M NaCl are separated by semi permeable membrane what occurs during osmosis

Slovent molecules move from B into A

Na+ + Cl- ions move from B into A

The molarity of A increases

No changes id observed

26. What is the value of the rate constant for the reaction of No with Cl2

2.38

3.35

4.76

9.52

27. The frequency factor and energy of a reaction are 8.7 * (10^12) S-1 and 36 KJ mol-1 the rate constand of a reaction at 25 C is

7.2 * (10^-2)

1.8 * (10^-2)

5.4 * (10^-3

3*(10^3)

28. Type question here

Increases{H+} when placed in H2O

Decreases{H+} when placed in H2O

Increases{OH-} when placed in H2O

Act as a proton acceptor in any system

Act as a proton donor in any system