CHM 101 TYPE B CBT PRACTICE TEST : Undergragra

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Take your time to read instructions before taking this test.

There are 40 questions which you are to answer in 15 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

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

70 – 100 A

60 – 69 B

50 – 59 C

45 – 49 D

40 – 44 E

0 – 39 F

I wish you success

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Created on March 27, 2023 By

Aruwaji Philip

CHM 101 TYPE B

1 / 40

1. What mass of HNO3(63g/mol) is contained in 300ml of 0.30 M HNO3 solution!

A. 6.3g

B. 0.3g

C. 30g

D. 5.67g

2 / 40

2. Rate of a reaction is measured in

A. 𝑚𝑜𝑙 𝑙𝑖𝑡−1𝑚𝑖𝑛−1

B. 𝑚𝑜𝑙 𝑐𝑚−1𝑠𝑒𝑐−3

C. 𝑚𝑜𝑙 𝑐𝑚−1h𝑟−1

D. 𝑚𝑜𝑙 𝑐𝑚−3𝑠𝑒𝑐−1

3 / 40

3. The pH of pure water is

A. -14

B. 14

C. -7

D. 7

4 / 40

4. Photolytic reactions take place in the presence of

A. Light

B. Heat

C. Catalyst

D. Pressure

5 / 40

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

A. Molecularity of reaction

B. Order of reaction

C. Equilibrium Law

D. Rate Equation

6 / 40

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

A. 𝑠𝑒𝑐𝑙𝑖𝑡𝑟𝑒−1𝑚𝑜𝑙−1

B. 𝑚𝑜𝑙𝑙𝑖𝑡𝑟𝑒−1𝑠𝑒𝑐−1

C. 𝑙𝑖𝑡𝑟𝑒𝑚𝑜𝑙−1𝑠𝑒𝑐

D. 𝑠𝑒𝑐−1

7 / 40

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

A. Activation Energy

B. Rate Limiting Energy

C. Net Energy

D. Potential Energy

8 / 40

8. Water is best described as

A. Base

B. Amphoteric

C. Acid

D. Ampiteric

9 / 40

9. Catalyst speeds up the rate of

A. Both forward and reverse reaction

B. Reverse Reaction

C. Forward Reaction

D. All reactions

10 / 40

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

A. Dalton but not accepted until the work of Einstein

B. Dalton but not accepted till Mendelev

C. Democritus but not widely accepted till modern times

D. Dalton and widely accepted within a few decades

11 / 40

11. Which of the following is not used to describe the condition of a gas?

A. Electronic configuration

B. Temperature

C. Number of moles

D. Pressure

12 / 40

12. 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?

A. First

B. Second

C. Fourth

D. Zeroth

13 / 40

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

A. Aufbau Principle

B. Le-Chatelier Principle

C. Pauli’s Exclusion Principle

D. Exclusion Principle

14 / 40

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

A. 5

B. 1

C. 9

D. 4

15 / 40

15. Catalyst ................... the rate of reaction by ................... the activation energy

A. increases/lowering

B. decreases/raising

C. increases/raising

D. decreases/lowering

16 / 40

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

A. C

B. Mg

C. N

D. Al

17 / 40

17. A saturated solution is defined as

A. A solution that is in equilibrium with undisolved solute

B. A solution that is in equilibrium with pure solute

C. A concentrated solution

D. A solution that is not in equilibrium with both pure solvent and undissolved solute

18 / 40

18. Which cell involves a non-spontaneous redox reaction?

A. Electrolytic Cell

B. Galvanic cell

C. Concentration cell

D. Fuel Cell

19 / 40

19. Order of a given reaction can only be determined

A. Experimentally

B. From the Rate Equation

C. From the chemical reaction

D. From the Molecuarity of reaction

20 / 40

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

A. Molecularity of a Reaction

B. Order of a Reaction

C. Overall order of a Reaction

D. Rate of a Reaction

21 / 40

21. An element that has the valence electronic configuration 3s2 3p3 belongs to which period and group?

A. Period 4 and Group 3A

B. Period 4 and Group 5A

C. Period 3 And Group 5A

D. Period 3 And Group 3A

22 / 40

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

A. Base

B. Acid

C. Salt

D. Lewis Acid

23 / 40

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

A. 𝑚𝑜𝑙𝑙𝑖𝑡𝑟𝑒−1𝑠𝑒𝑐−1

B. 𝑠𝑒𝑐−1

C. 𝑠𝑒𝑐𝑙𝑖𝑡𝑟𝑒−1𝑚𝑜𝑙−1

D. 𝑙𝑖𝑡𝑟𝑒𝑚𝑜𝑙−1𝑠𝑒𝑐−1

24 / 40

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

A. +7

B. -2

C. +6

D. +3

25 / 40

25. Gamma radiation can be described as

A. positively charged free electron

B. A helium nucleus

C. High energy electromagnetic radiation

D. A negatively charged free electron

26 / 40

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

A. Yes it doesn't

B. No it does

C. No it doesn't

D. Yes it does

27 / 40

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

A. Concentration of product

B. Initial concentration of the reactions

C. Concentration of the reactant left

D. Rate constant

28 / 40

28. A zeroth order reaction is one whose

A. Rate can be found where [A] t =-kt + ln[A] o

B. Rate is zero

C. Rate is independent of reactant concentration

D. Rate is dependent on none of the reactants

29 / 40

29. The change in the concentration of reactant or product per unit time is known as

A. Rate Law

B. Order of a reaction

C. Molecularity of a reaction

D. Rate of a reaction

30 / 40

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

Mg =24.31

N= 14.01

O= 16

A. 0.01889%

B. 1.889%

C. 0.1889%

D. 18.99%

31 / 40

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

A. M

B. m

C. µ

D. n

32 / 40

32. A reaction in which the same substance on the reactant side is being oxidized and reduced simultaneously is known as

A. Addition reaction

B. Combustion reaction

C. Dispropornation reaction

D. Substitution reaction

33 / 40

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

A. Concentration of the reactant left

B. Concentration of product

C. Rate constant

D. Initial concentration of the reactants

34 / 40

34. Ozone is unstable, decomposing to oxygen, as shown in the balanced equation 2O2 ➡ 3O2. In this reaction, how many grams of oxygen can be formed from the decomposition of 96g of ozone?

A. 16g

B. 6g

C. 32g

D. 96g

35 / 40

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

A. Salt

B. Base

C. Lewis Base

D. Acid

36 / 40

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

A. More oxygen atoms

B. Lesser number of hydrogen atoms

C. Equivalent number of oxygen atoms

D. Lesser number of oxygen atoms

37 / 40

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

A. Equilibrium Law

B. Molecularity of reaction

C. Rate Equation

D. Order of reaction

38 / 40

38. The sum of all exponents of the reactants as contained in the experimentally determined rate law is known as

A. Overall order of reaction

B. Overall molecularity of reaction

C. Overall equilibrium law

D. Overall rate law

39 / 40

39. The powers to which the concentration of each reactant is raised to give a correct dependence of rate on concentration is termed

A. Molecularity of reaction

B. Order of reaction

C. Equilibrium Law

D. Rate Equation

40 / 40

40. What is the pH of a neutral solution at 25 0C?

A. 7

B. 14

C. 3

D. 1

Your score is

The average score is 46%

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