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
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70 – 100 A

60 – 69 B

50 – 59 C

45 – 49 D

40 – 44 E

0 – 39 F

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Created on March 27, 2023 By

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CHM 101 TYPE B

1 / 40

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

A. 7

B. 1

C. 14

D. 3

2 / 40

2. Photolytic reactions take place in the presence of

A. Catalyst

B. Pressure

C. Light

D. Heat

3 / 40

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

A. Acid

B. Base

C. Lewis Base

D. Salt

4 / 40

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

A. Lesser number of hydrogen atoms

B. More oxygen atoms

C. Lesser number of oxygen atoms

D. Equivalent number of oxygen atoms

5 / 40

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

A. Molecularity of a reaction

B. Rate Law

C. Rate of a reaction

D. Order of a reaction

6 / 40

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

A. Concentration of product

B. Concentration of the reactant left

C. Rate constant

D. Initial concentration of the reactants

7 / 40

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

A. 𝑠𝑒𝑐𝑙𝑖𝑡𝑟𝑒−1𝑚𝑜𝑙−1

B. 𝑠𝑒𝑐−1

C. 𝑚𝑜𝑙𝑙𝑖𝑡𝑟𝑒−1𝑠𝑒𝑐−1

D. 𝑙𝑖𝑡𝑟𝑒𝑚𝑜𝑙−1𝑠𝑒𝑐−1

8 / 40

8. 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

9 / 40

9. The pH of pure water is

A. -14

B. 7

C. 14

D. -7

10 / 40

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

A. Acid

B. Salt

C. Lewis Acid

D. Base

11 / 40

11. 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

12 / 40

12. Order of a given reaction can only be determined

A. From the Molecuarity of reaction

B. From the Rate Equation

C. Experimentally

D. From the chemical reaction

13 / 40

13. 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

14 / 40

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

A. Mg

B. C

C. Al

D. N

15 / 40

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

A. Equilibrium Law

B. Rate Equation

C. Molecularity of reaction

D. Order of reaction

16 / 40

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

A. Net Energy

B. Rate Limiting Energy

C. Potential Energy

D. Activation Energy

17 / 40

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

A. Overall order of a Reaction

B. Molecularity of a Reaction

C. Order of a Reaction

D. Rate of a Reaction

18 / 40

18. Catalyst speeds up the rate of

A. Both forward and reverse reaction

B. All reactions

C. Reverse Reaction

D. Forward Reaction

19 / 40

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

A. 4

B. 5

C. 1

D. 9

20 / 40

20. 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

21 / 40

21. 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. 6g

B. 96g

C. 16g

D. 32g

22 / 40

22. Water is best described as

A. Amphoteric

B. Ampiteric

C. Acid

D. Base

23 / 40

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

A. Rate constant

B. Concentration of product

C. Concentration of the reactant left

D. Initial concentration of the reactions

24 / 40

24. 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. Equilibrium Law

C. Order of reaction

D. Rate Equation

25 / 40

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

A. Aufbau Principle

B. Pauli’s Exclusion Principle

C. Exclusion Principle

D. Le-Chatelier Principle

26 / 40

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

A. Yes it doesn't

B. No it does

C. Yes it does

D. No it doesn't

27 / 40

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

A. increases/raising

B. decreases/lowering

C. increases/lowering

D. decreases/raising

28 / 40

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

A. Overall molecularity of reaction

B. Overall equilibrium law

C. Overall order of reaction

D. Overall rate law

29 / 40

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

A. Dalton but not accepted till Mendelev

B. Dalton but not accepted until the work of Einstein

C. Dalton and widely accepted within a few decades

D. Democritus but not widely accepted till modern times

30 / 40

30. A saturated solution is defined as

A. A solution that is in equilibrium with pure solute

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

C. A solution that is in equilibrium with undisolved solute

D. A concentrated solution

31 / 40

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

A. Number of moles

B. Pressure

C. Temperature

D. Electronic configuration

32 / 40

32. A zeroth order reaction is one whose

A. Rate is independent of reactant concentration

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

C. Rate is dependent on none of the reactants

D. Rate is zero

33 / 40

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

A. 0.3g

B. 6.3g

C. 30g

D. 5.67g

34 / 40

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

A. Galvanic cell

B. Fuel Cell

C. Concentration cell

D. Electrolytic Cell

35 / 40

35. 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. Fourth

B. First

C. Second

D. Zeroth

36 / 40

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

A. +6

B. +3

C. +7

D. -2

37 / 40

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

A. Period 3 And Group 3A

B. Period 4 and Group 3A

C. Period 3 And Group 5A

D. Period 4 and Group 5A

38 / 40

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

Mg =24.31

N= 14.01

O= 16

A. 0.01889%

B. 0.1889%

C. 18.99%

D. 1.889%

39 / 40

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

A. Rate Equation

B. Molecularity of reaction

C. Order of reaction

D. Equilibrium Law

40 / 40

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

A. M

B. µ

C. n

D. m

Your score is

The average score is 46%

CHM 101 TYPE B CBT PRACTICE TEST

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