FUOYE CHM 101 CBT PRACTICE TEST EXAM MODE

Ace/Undergragra March 6, 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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Created on January 07, 2023 By

Ace/Undergragra

CHM 101

1 / 50

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

A. Temperature

B. Number of moles

C. Pressure

D. Electronic configuration

2 / 50

2. 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

A. 14.7g

B. 43.8g

C. 48.4g

D. 21.9g

3 / 50

3. Elements in a periodic group have similar

A. Masses

B. Densities

C. Chemical properties

D. Physical properties

4 / 50

4. A zeroth order reaction is one whose

A. Rate is dependent on none of the reactants

B. Rate is zero

C. Rate is independent of reactant concentration

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

5 / 50

5. The Element that best describes Alpha decay is?

A. Methane

B. Calcium

C. Helium

D. Sodium

6 / 50

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

A. Protons, neutrons

B. Electron, neutron

C. Nucleon, neutron

D. Protons, electrons

7 / 50

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

A. Mg

B. Al

C. N

D. C

8 / 50

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

A. +3

B. -2

C. +7

D. +6

9 / 50

9. The energy of motion is

A. Electrical Energy

B. Kinetic Energy

C. Reserve energy

D. Dam energy

10 / 50

10. 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. Democritus but not widely accepted till modern times

D. Dalton and widely accepted within a few decades

11 / 50

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

A. Fuel Cell

B. Galvanic cell

C. Concentration cell

D. Electrolytic Cell

12 / 50

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

A. Alkaline earth metal

B. Halogen

C. Alkali metal

D. Noble

13 / 50

13.

What is the minimum energy barrier that must be overcome for a chemical reaction to occur

A. Rate limiting energy

B. Net energy

C. Potential Energy

D. Activation Energy

14 / 50

14.

Which of the following can be interpreted as a measure of randomness

A. Enthalpy

B. Temperature

C. Entropy

D. Free Energy

15 / 50

15.

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

A. -1.9°C

B. -0.93°C

C. -2.8°C

D. -6.5°C

16 / 50

16.

The effect of ionizing radiation depend on

A. Type and energy of radiation

B. All of the above

C. Location of source (internal or external)

D. Length of exposure to radiation

17 / 50

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

A. 6.3g

B. 5.67g

C. 30g

D. 0.3g

18 / 50

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

A. M

B. n

C. µ

D. m

19 / 50

19. Which of the following can be classified as a weak base?

A. NH2OH

B. Both CH3NH2 and NH2OH

C. None of these

D. CH3NH2

20 / 50

20. What is the Mass number of Na?

A. 22

B. 20

C. 23

D. 11

21 / 50

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

A. Concentration cell

B. Galvanic cell

C. Fuel Cell

D. Electrolytic Cell

22 / 50

22. The factor 0.001 corresponds to which prefix

A. Deci

B. Centi

C. deka

D. Milli

23 / 50

23. Water is an example of

A. Compound

B. A mixture

C. An ion

D. An element

24 / 50

24. The binding energy is defined as

A. The amount of energy absorbed when electrons are added to an ion

B. The amount of energy absorbed when protons and neutrons form a nucleus

C. The amount of energy required to break apart a nucleus into individual protons and neutrons

D. The amount of energy released when electrons are removed from the atom

25 / 50

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

A. Period 3 And Group 5A

B. Period 4 and Group 5A

C. Period 4 and Group 3A

D. Period 3 And Group 3A

26 / 50

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

A. Pb(OH)2

B. Na2SO4

C. AgBr

D. PbCrO4

27 / 50

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

A. Iodine

B. Chlorine

C. Bromine

D. Fluorine

28 / 50

28. Which of the following supports Boyles law

A. T = KV

B. NRT=KV

C. PV/R

D. K=PV

29 / 50

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

A. 3.41g

B. 1.71g

C. 6.82g

D. 0.341g

30 / 50

30. Gamma radiation can be described as

A. High energy electromagnetic radiation

B. positively charged free electron

C. A negatively charged free electron

D. A helium nucleus

31 / 50

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

A. Very low

B. Very heavy

C. Moderate

D. Moderate to heavy

32 / 50

32.

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

A. Cathode, anode

B. Anode, cathode

C. Anode, anode

D. Cathode, cathode

33 / 50

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

A. H2SO3

B. KOH

C. HF

D. HCLO

34 / 50

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

A. 0.272

B. 0.154

C. 0.214

D. 0.846

35 / 50

35. Which group reacts violently with water?

A. Alkaline earth metal

B. Halogens

C. Noble gases

D. Alkali metals

36 / 50

36.

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

A. Lowers only the energy of the reactants and products

B. Raises only the energy of the products

C. All of these are affected by the presence of a catalyst

D. Lowers only the activation Energy

37 / 50

37. Who is the Dean of Faculty of Science in Fuoye

A. Dr. Malomo

B. Dr. Lawal

C. Dr. Shakirudeen

D. Dr. Okolo

38 / 50

38. Radiation is detected by its ___________ properties

A. Gravitational

B. Thermal

C. Kinetic

D. Ionizing

39 / 50

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

A. +6

B. -2

C. +3

D. +7

40 / 50

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

A. 1s2 2s2 2p6 3s2 3p6 4s1

B. 1s2 2s2 2p6 3s2 3p6

C. 1s2 2s2 2p6

D. 1s2 2s2 2p6 3s2

41 / 50

41. A saturated solution is defined as

A. A solution that is in equilibrium with pure solute

B. A concentrated solution

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

D. A solution that is in equilibrium with undisolved solute

42 / 50

42. 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. 96g

B. 16g

C. 32g

D. 6g

43 / 50

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

A. Charge on the atom or ion

B. Atomic Number

C. None of these

D. Mass Number

44 / 50

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

A. Potential Energy

B. Rate Limiting Energy

C. Net Energy

D. Activation Energy

45 / 50

45. What is the overall reaction order for the reaction that has the rate law: k[H2] [NO] 2

A. Second order

B. First order

C. Third order

D. Zero order

46 / 50

46.

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?

A. 25 grams

B. 50 grams

C. 0 grams

D. 100 grams

47 / 50

47. 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. 18.99%

D. 1.889%

48 / 50

48. Molarity is defined as ______

A. Moles of solute per liter of solution

B. Moles of solute per litre of solvent

C. Moles of solvent per liter of solution

D. Moles solvent per liter of solvent

49 / 50

49. 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. Fourth

C. Zeroth

D. Second

50 / 50

50. 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

A. 10.3g

B. 6.15g

C. 3.45g

D. 31.0g

Your score is

The average score is 48%