CHM 101 TYPE B CBT PRACTICE TEST

Ace/Undergragra March 27, 2023

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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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Undergragra

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Created on March 27, 2023 By

Ace/Undergragra

CHM 101 TYPE B

1 / 40

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

A. Rate Equation

B. Order of reaction

C. Molecularity of reaction

D. Equilibrium Law

2 / 40

2. The pH of pure water is

A. -14

B. -7

C. 14

D. 7

3 / 40

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

A. +3

B. +6

C. +7

D. -2

4 / 40

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

A. 4

B. 9

C. 1

D. 5

5 / 40

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

A. Yes it does

B. No it does

C. No it doesn't

D. Yes it doesn't

6 / 40

6. 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

7 / 40

7. A saturated solution is defined as

A. A solution that is in equilibrium with pure solute

B. A solution that is in equilibrium with undisolved solute

C. A concentrated solution

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

8 / 40

8. 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 and widely accepted within a few decades

C. Democritus but not widely accepted till modern times

D. Dalton but not accepted till Mendelev

9 / 40

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

A. Rate Equation

B. Equilibrium Law

C. Molecularity of reaction

D. Order of reaction

10 / 40

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

A. Pauli’s Exclusion Principle

B. Exclusion Principle

C. Le-Chatelier Principle

D. Aufbau Principle

11 / 40

11. Water is best described as

A. Ampiteric

B. Amphoteric

C. Acid

D. Base

12 / 40

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

A. Period 3 And Group 5A

B. Period 3 And Group 3A

C. Period 4 and Group 3A

D. Period 4 and Group 5A

13 / 40

13. 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

14 / 40

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

A. 30g

B. 5.67g

C. 0.3g

D. 6.3g

15 / 40

15. Order of a given reaction can only be determined

A. From the Rate Equation

B. From the chemical reaction

C. Experimentally

D. From the Molecuarity of reaction

16 / 40

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

See also PHY 102 CBT PRACTICE

A. decreases/raising

B. increases/raising

C. decreases/lowering

D. increases/lowering

17 / 40

17. 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

18 / 40

18. 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

19 / 40

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

A. 𝑙𝑖𝑡𝑟𝑒𝑚𝑜𝑙−1𝑠𝑒𝑐

B. 𝑚𝑜𝑙𝑙𝑖𝑡𝑟𝑒−1𝑠𝑒𝑐−1

C. 𝑠𝑒𝑐−1

D. 𝑠𝑒𝑐𝑙𝑖𝑡𝑟𝑒−1𝑚𝑜𝑙−1

20 / 40

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

A. Galvanic cell

B. Electrolytic Cell

C. Fuel Cell

D. Concentration cell

21 / 40

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

A. 𝑚𝑜𝑙𝑙𝑖𝑡𝑟𝑒−1𝑠𝑒𝑐−1

B. 𝑙𝑖𝑡𝑟𝑒𝑚𝑜𝑙−1𝑠𝑒𝑐−1

C. 𝑠𝑒𝑐−1

D. 𝑠𝑒𝑐𝑙𝑖𝑡𝑟𝑒−1𝑚𝑜𝑙−1

22 / 40

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

A. Salt

B. Base

C. Acid

D. Lewis Acid

23 / 40

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

A. Temperature

B. Pressure

C. Electronic configuration

D. Number of moles

24 / 40

24. Photolytic reactions take place in the presence of

A. Pressure

B. Light

C. Heat

D. Catalyst

25 / 40

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

A. Concentration of product

B. Initial concentration of the reactions

C. Rate constant

D. Concentration of the reactant left

26 / 40

26. Rate of a reaction is measured in

A. 𝑚𝑜𝑙 𝑐𝑚−3𝑠𝑒𝑐−1

B. 𝑚𝑜𝑙 𝑐𝑚−1𝑠𝑒𝑐−3

C. 𝑚𝑜𝑙 𝑐𝑚−1h𝑟−1

D. 𝑚𝑜𝑙 𝑙𝑖𝑡−1𝑚𝑖𝑛−1

27 / 40

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

A. Combustion reaction

B. Dispropornation reaction

C. Substitution reaction

D. Addition reaction

28 / 40

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

Mg =24.31

N= 14.01

O= 16

A. 0.1889%

B. 0.01889%

C. 1.889%

D. 18.99%

29 / 40

29. 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. Order of a Reaction

C. Rate of a Reaction

D. Molecularity of a Reaction

30 / 40

30. Gamma radiation can be described as

A. A negatively charged free electron

B. A helium nucleus

C. High energy electromagnetic radiation

D. positively charged free electron

31 / 40

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

A. Rate Law

B. Rate of a reaction

C. Order of a reaction

D. Molecularity of a reaction

32 / 40

32. 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. Zeroth

B. Fourth

C. Second

D. First

33 / 40

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

A. 14

B. 3

C. 1

D. 7

34 / 40

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