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EKSU CHM 101 CBT PRACTICE

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Phil
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Hey EKSUites!

Are you preparing for your upcoming CBT exams and want a solid way to test your knowledge and build confidence? We’ve got something exciting for you—CBT Practice Questions with a built-in timer to simulate real exam pressure and boost your speed.

Take your time to read instructions before taking this test.

There are 50 questions which you are to answer in 20 minutes that gives you roughly 30 seconds per question.

If you can get at least 60%, you can be rest assured that you’ll ace CHM 101 exam

PS

In a normal exam you will be asked between 40 – 60 questions but I only arranged 40 questions

Note

Do not be in a hurry to answer the questions

Do not waste time on a question you don’t know

Move as fast as possible and starting with questions that don’t have calculation first to save time

Always crosscheck

Don’t be in a hurry to submit, you are not in a competition

Don’t be scared. Getting an A is easy

Don’t be over confident, you can end up a D, E or F. Calm your blood, no be only you sabi book

Please do well to use our comment box incase there’s a message you want to pass to us

Want to stay updated with exam info, materials, and more practice resources?

Join the UNDERGRAGRA WhatsApp Channel now!

Here’s the link: https://whatsapp.com/channel/0029VakX28dFi8xdORrhjI34

Keep pushing, stay focused, and good luck on your exams. You’ve got this!

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Created on By Phil

EKSU CHM 101

1 / 50

1. Isotopes have the same number of __________ but different numbers of ___________ in their nuclei

2 / 50

2. A substance that ionizes in solution to produce hydroxyl ion is

3 / 50

3. Which group reacts violently with water?

4 / 50

4. Using the method of initial rates for the reaction A➡B, if the initial concentration of A is doubled and the rate of reaction quadruples, what is the order of reaction with respect to A?

5 / 50

5. Which of the following is not an Arrhenius acid?

6 / 50

6. Elements with ___________ atomic mass are best possible candidates for a fusion reaction

7 / 50

7. What is the minimum energy barrier that must be overcomed for a chemical reaction to occur

8 / 50

8. Chlorine belongs to the ____________ group on the periodic table

9 / 50

9. Gamma radiation can be described as

10 / 50

10. Water is an example of

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11.

An isotope has a half-life of 30 minutes. Given an original sample of 100 g of the isotope, how much will be left after an hour?

12 / 50

12. Substances that dissolve in water to release hydroxonium ion is known as

13 / 50

13. How many grams of KNO3 are needed to make 250ML of a solution that is 0.135M

 

14 / 50

14. The number of nucleons in an atom or ion is the same as the

15 / 50

15. What is the Mass number of Na?

16 / 50

16. An expression which shows how a reaction is related to concentration is termed

17 / 50

17. Calculate the percentage composition of Nitrogen in Magnesium Nitrate Mg(No3)2

Mg =24.31

N= 14.01

O= 16

18 / 50

18. Water is best described as

19 / 50

19. What is the mole fraction of ethanol in a solution made by dissolving 25g of ethanol, C2H5OH, in 53.6g of Water

20 / 50

20. The pH of pure water is

21 / 50

21. What symbol is used to express the facor,10^-6?

22 / 50

22. Zinc and carbon rods are used as anode and cathode respectively in a

23 / 50

23. Rate of a reaction is measured in

24 / 50

24. What is the oxidation number of the chromium atom in K2Cr2O4?

25 / 50

25. The half-life of a first order reaction depends on

26 / 50

26.

The effect of ionizing radiation depend on

27 / 50

27. Does temperature changes affect the equilibrium constant of a reaction?

28 / 50

28. The binding energy is defined as

 

29 / 50

29. To balance a redox reaction in basic medium, 𝐻2𝑂 is added to the side with

30 / 50

30. An element with atomic number twelve is likely to be

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31.

A catalyst increases the rate of reaction by providing a different reaction pathway that

32 / 50

32. Which of the following compounds would be soluble in water?

33 / 50

33. According to history, the concept that all matter is composed of atom was first proposed by

34 / 50

34.

During an electrochemical reaction, electrons move through the external circuit toward the __________ and positive ion in the cell move toward the ____________.

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35. Of the following, which element has the highest first ionization energy

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36. A saturated solution is defined as

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37. What is the oxidation number of the chromium atom in K2Cr2O7

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38. How many grams of chromium metal are plated out when a constant current of 8.00A is passed through an aqueous solution containing Cr3+ ions for 40 minutes

39 / 50

39. What is the pH of a basic solution whose hydroxyl ion concentration is 0.00001M?

40 / 50

40. What is the electronic configuration of Potassium (K)?

41 / 50

41. The rate of a reaction is directly proportional to the concentration of reactants. This is referred to as

42 / 50

42. What is the identity of the element with 6 protons, 7 Neutrons and 6 electrons

43 / 50

43. 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g)
In the reaction above, the mass of carbon(IV)oxide produced on burning 78 g of ethyne is
[C =12, O = 16, H = 1]

44 / 50

44. The unit of rate constant, K, in a first order reaction is

45 / 50

45. The Element that best describes Alpha decay is?

46 / 50

46. The number of molecules/ions of the reactants present in the balanced stoichiometric equation is referred to as:

47 / 50

47.

What is the expected freezing point of a 0.50m solution of Na2CO3 in water? Kf for water is 1.86°C/m

48 / 50

48. How many grams of nickel metal are plated out when a constant current of 15.0A is passed through aqueous NiCl2 for 80.0 minutes

49 / 50

49. If 30cm3 of gas at 50oC is warmed to 80o at a fixed pressure, the fractional increase in volume is

50 / 50

50. The shifting of the equilibrium position to annul the effect of changes to re-establish equilibrium is termed

Your score is

The average score is 7%

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