Atoms and Chemical Bonding Multiple Choice Test

If you want to test your ability in Atoms and Chemical bonding topics, you can try the following Multiple Choice Test and see how far you know about this topics.

 

            1.  On the basis of Rutherford’s model of an atom, which subatomic particle is present in the nucleus of an atom?

a. proton and electron                         c. proton and neutron

b. neutron and electron                       d. proton only

            2.   If the first and second energy levels of an atom are full, then what would be the total number of electrons in the atom?

a. 6                  b. 8                  c. 10                d.18

            3.  Which atomic model is proposed by Schrodinger?

a. nuclear model                                  c. raisin bread model

b. planetary model                              d. quantum mechanical model

            4.  Which electron transition results in the emission of energy?

a. 3p to 3s                                            c. 2s to 2p

b. 3p to 4p                                           d. 1s to 2s

            5.  The symbol “n” in the Bohr theory of atomic structure refers to

a. the energy of electron.                   

b. the total energy of the atom.

c. the number of electron in an energy level.

d. the orbit in which an electron is found.

            6.  How many orbitals are in the third principal energy level?

a. 3                  b. 6                  c. 9                  d. 12

            7.  Which orbital designation has the highest energy?

a. 2s                 b. 2p                c. 3d                d. 4s

            8.  For a neutral atom with the electron configuration of 1s² 2s² 2p⁵ 3s¹ , which statement is false?

a. The atomic number is ten.

b. The 1s and 2s orbitals are filled

c. The atom is in the ground state.

d. The atom is in the excited state

            9.  Which of the following statements is NOT true of the atomic model of Bohr?

a. The hydrogen is made up of a positively charged nucleus

b. The electron revolves around the nucleus in a circular orbit.

c. The energy of the electron in a given orbit is not fixed.

d. An electron can absorb or emit a quantity of radiation.

            10.  Which statement is incorrect?

a. Orbital is a region in an atom where an electron can be found.

b. An electron can absorb energy when it jumps to a higher energy level.

c. An electron can emit energy when it jumps to a higher energy level.

d. Filling of electrons in an atom starts from a low energy level to the highest energy level.

            11.  What occurs when an electron moves from high energy level to a low one?

a. another electron goes from a low energy level to a high one

b. the atom moves faster

c. colored light is given off

d. this process is not possible

            12.   Which of the properties of atoms is the most suitable reference for the kind of bond that will take place between/among them?

a. atomic size                                       c. electronegativity

b. ionization energy                             d. electron affinity

            13.  What kind of particle is produced after covalent bonding?

a. atom                                                c. molecule

b. ion                                                   d. electron

            14.  What kind of chemical bond will form between two oxygen atoms?

a. ionic bond                                       b. metallic bond

c. polar covalent bond                         d. nonpolar covalent bond

            15.  Which among the following shows that an atom is stable?

a. having 2 valence electrons              c. having 4 valence electrons

b. having 6 valence electrons              d. having 8 valence electrons

            16. Choose 2 elements that would likely form an ionic bond among the following elements: Li, Si, F, Ne

a. Li and Si                                          c. Ne and Si   

b. Si and F                                           d. Li and F

            17.  Why do atoms react with one another to form chemical bonds?

a. to attain stability                             c. to form compounds

b. to form molecules                           d. to produce ions

            18.  What bond holds the atoms of the elements in Groups 1and 2 of the Periodic Table?

a. nonpolar covalent bond                   b. polar covalent bond

c. metallic bond                                   d. ionic bond

            19.  Which of the following sets of samples has metallic bond, covalent bond and ionic bonding in this order?

a. bronze, paraffin wax, and salt        

b. alloy, vetsin, and water

c. gold ring, baking soda, and starch

d. coins, salt, and carbon dioxide

            20.   How is the bond in Br2 different from the bond in MgF2?

a. The bond in Br2 is metallic while the bond in MgF2 is covalent.

b. The bond in Br2 is ionic while the bond in MgF2 is covalent.

c. The bond in Br2 is covalent while the bond in MgF2 is ionic.

d. There is no bond difference between the two.

            21.  When does covalent bonding take place?

a. It takes place when atoms share electrons with one another.

b. It takes place when the attraction between atoms is strong.

c. It takes place when atoms collide with one another.

d. It takes place when atoms attain stability.

  

            22. -30  Make a concept map using  the different words and formulas  below:

                        Sharing e-                   covalent bond             CaF₂                ionic bond

                        Polar covalent             chemical bond             two metals       sea of valence e-

                        H2O                            transfer e-                    nonpolar covalent        O2

                        Metallic bond

          Answers Key:

1.  c

2.  c

3.  d 

4. a

5. d

6. c

7. c

8.  c

9.  c

10. c

11. c

12.  c

13.  c

14. d

15. d

16. d

17. a

18. c

19. a

20. c

21. a

22-30

                                   

            

MULTIPLE CHOICE TEST IN PHOTOSYNTHESIS AND CELLULAR RESPIRATION

Evaluation is an integral part of the learners.  To test your ability or your students try the following questions about Photosynthesis and Cellular Respiration.

              1.  Where do light-dependent reactions of photosynthesis occur?

a.       in the guard cell of the stomata

b.      in the chloroplast of stroma

c.       within the thylakoid membranes of the chloroplast

d.      in the leaf cell cytoplasm

              2.  The oxygen produced during photosynthesis comes from

a.       the breakdown of CO_2.

b.      the breakdown of water.

c.       the breakdown of both CO₂ and water.

d.      the breakdown of oxaloacetic acid.

             3.  Photosynthesis is measured in the leaf of a green plant exposed to different wavelengths of light.  Photosynthesis is

a.       highest in green plants.

b.      highest in red light.

c.       highest in blue light.

d.      highest in red and blue light.

             4.  Where do the light-independent, carbon-fixing reactions occur?

a.       in the guard cell cytoplasm

b.      in the chloroplast stroma

c.       within the thylakoid membrane

d.      at night in the thylakoids

             5.  Oxygen and carbon dioxide are gases that cycle out in the ecosystem. Which of the following gases is important to photosynthesis?

                        a. ozone gas                                         c. oxygen

b. water vapor                                                 d. carbon dioxide

             6.  The light-dependent reaction of photosynthesis must come first before the light independent reaction because its products are important to the fixation of carbon dioxide.  Which of the following is/are the product/s of the light–dependent reaction?

a. ADP only                                        c. ATP only

b. NADPH only                                  d. NADPH and ATP

             7.  Plants are very unique among other organisms due to their capability to trap sunlight and make their own food.  Which of the following enables plants to trap energy from the sun?

a. epidermis                                         c. cuticle

b. chloroplast                                       d. chlorophyll

             8.  Plants make food by absorbing water and carbon dioxide. Which of the following substances is the origin of oxygen released as gas by green plants during photosynthesis?

a. water                                               c. carbon dioxide

b. sugar                                                d. ribulose-1,5-biphosphate

            9.  The role of accessory  pigment is to

a.       provide an additional photosystem to generate more ATP.

b.      allow photosynthesis to occur in the dark.

c.       donate electrons to cholophyll reaction centers.

d.      capture additional light energy and transfer it to the chlorophyll reaction centers.

            10.  The generation of ATP by electron transport in photosynthesis and cellular respiration depends upon

a.       a proton gradient across a membrane.

b.      proton pumps driven by electron transport chains.

c.       an ATP synthesizing enzymes complex.

d.      a, b, c, are all required for ATP generation.

            11.  A farmer is experiencing a problem in growing his crops. Most of the leaves of the crops are turning yellow. Which of the following will likely result from the yellowing of the leaves of the crops?

a. It will increase the production of food.

b. It will decrease the production of food.

c. The production of food will remain the same.

d. None of the above.

            12.   Which of the following materials are cycled out by the chloroplast and mitochondrion?

a. Carbon dioxide, water, oxygen, and ATP

b. Carbon dioxide, water, sugar and oxygen

c. Sugar, water, oxygen, and ATP

d. Sugar, water, sunlight, and oxygen

            13.  Where does glycolysis occur?

a.       Cytoplasm

b.      Matrix of mitochondria

c.       Inner membrane of mitochondria

d.      Outer membrane of mitochondria

            14.  Where does respiratory electron transport occur?

a.       Cytoplasm

b.      Matrix of mitochondria

c.       Inner membrane of mitochondria

d.      Outer membrane of mitochondria

            15.  What are the economically important products of the fermentation of grape juice by yeast that are essential for the manufacture of champagne?

a.       Lactic acid and NAD+                 c.  ATP and CO₂

b.      ATP and ethanol                           d.  CO₂ and ethanol

            16.  The majority ATP produced in aerobic respiration comes from

a.       Glycolysis.

b.      the electron transport system.

c.       the citric cycle.

d.      Fermentation.

            17.  Pyruvate is the product of glycolysis. If there is no oxygen available to cells of the human body, what becomes of pyruvate?

a. alcohol                                             c. CO2

b. lactic acid                                        d. a and c

            18.  How many molecule/s of carbon dioxide is/are released from one pyruvic acid molecule being oxidized?

a. 1                  b. 3                             c. 2                              d. 4

            19.  Oxygen is essential in cellular respiration. What is the role of oxygen in the electron transport chain?

a. It provides a high energy proton.                c. It serves as the final acceptor.

b. It releases an electron.                                 d. It forms water.

            20.  The process that converts glucose into two molecules of pyruvate is

a.       glycolysis                                                  c.  the citric acid cycle

b.      fermentation                                              d.  electron transport chain

            21.  What will happen if ATP and NADPH are already used up at night?

a. Less oxygen will be produced.                   c. Glucose production will stop.

b. Less carbon dioxide will be used.               d. Water molecule will split to form

    electrons.

            22.  Which of the following best explains why planting trees and putting up urban gardens can help prevent global warming?

a. Plants produce oxygen during day time and perform transpiration.

b. Plants absorb carbon dioxide that contributes to the rising of earth’s temperature.

c. Plants perform photosynthesis.

d. Plants use up carbon dioxide during photosynthesis, release oxygen to the environment, and perform transpiration.

            23. Sugarcane juice is used in making table sugar which is extracted from the stem of the plant. Trace the path of sugar molecules found in the stem from where they are produced.

a. Root ---- stem                                  c. flowers ---- leaf ----stem

b. Leaf ----- stem                                 d. roots --- leaf ---- stem

            24. What happens to the Hydrogen carried to the electron transport chain?

a. It ends up as water              c. It is recycled to Glycolysis

b. It forms lactate                                d. It forms methane

ANSWERS KEY:

1. d

2. b

3. d

4. b

5. d

6. d

7. d

8. a

9. d

10. d

11. b

12. b

13. a

14. c

15. d

16. b

17. b

18. c

19. c

20. a

21. c

22. d

23. b

24. a