Revision and Review Test Questions Chemistry SS 1 First Term Lesson Notes Week 11

Week 11 Revision – Chemistry SS 1

Topics Covered: Introduction to Chemistry, Particulate Nature of Matter, Symbols, Formulae and Equations, Chemical Combinations, and States of Matter

Part A: Review and Revision (FAQs)

1. What is Chemistry?
   Chemistry is the study of matter and how it changes.
2. What is matter?
   Matter is anything that has mass and takes up space.
3. How are solids different from gases?
   Solids have a fixed shape; gases do not.
4. What is an atom?
   An atom is the smallest unit of an element.
5. What does the atomic number represent?
   The atomic number is the number of protons in an atom.
6. What is a chemical bond?
   A chemical bond is a force that holds atoms together.
7. How does an ionic bond form?
   It forms when one atom transfers electrons to another atom.
8. What is a covalent bond?
   A covalent bond is when atoms share electrons.
9. What are the three states of matter?
   Solid, liquid, and gas.
10. What is the periodic table?
    The periodic table is a chart showing all known elements.
11. What is the empirical formula?
    It is the simplest formula showing element ratios in a compound.
12. What does “isotropy” mean?
    Isotropy means having atoms with the same number of protons but different neutrons.
13. What is a molecule?
    A molecule is two or more atoms bonded together.
14. What is the law of conservation of matter?
    It states that matter cannot be created or destroyed.
15. What is the kinetic theory?
    It explains how particles move in different states of matter.
16. What does sublimation mean?
    Sublimation is when a solid changes directly into a gas.
17. What are valencies?
    Valencies show how many electrons an atom can give or take.
18. What is a chemical symbol?
    A chemical symbol is a letter that represents an element.
19. How do you calculate atomic mass?
    Add the number of protons and neutrons.
20. What is a proton?
    A proton is a positively charged particle in the nucleus.

Part B: Objective Questions (Fill-in-the-Blank with Options)

1. The __________ number is equal to the number of protons in an atom.
   a) atomic
   b) mass
   c) neutron
   d) valency
2. A __________ bond is formed when atoms share electrons.
   a) ionic
   b) covalent
   c) metallic
   d) hydrogen
3. The periodic table organizes elements based on their __________.
   a) color
   b) shape
   c) atomic number
   d) atomic size
4. The __________ theory explains particle movement in matter.
   a) atomic
   b) particle
   c) kinetic
   d) chemical
5. Elements with similar properties are found in the same __________.
   a) group
   b) period
   c) row
   d) column
6. A molecule with two hydrogen atoms and one oxygen atom is called __________.
   a) OH
   b) H2
   c) H2O
   d) HO2
7. Protons have a __________ charge.
   a) positive
   b) negative
   c) neutral
   d) variable
8. The atomic mass is the total of __________ and neutrons.
   a) protons
   b) electrons
   c) neutrons
   d) ions
9. A __________ is the smallest unit of a compound.
   a) proton
   b) electron
   c) molecule
   d) atom
10. Water can change from a liquid to a gas in a process called __________.
    a) freezing
    b) evaporation
    c) condensation
    d) melting
11. __________ bonds involve the transfer of electrons.
    a) Metallic
    b) Ionic
    c) Covalent
    d) Dative
12. Solids have a __________ shape and volume.
    a) fixed
    b) loose
    c) fluid
    d) compressed
13. The atomic mass unit is based on the __________ isotope.
    a) oxygen-16
    b) carbon-12
    c) hydrogen-1
    d) nitrogen-14
14. Electrons are located in __________ around the nucleus.
    a) rings
    b) shells
    c) tubes
    d) cells
15. __________ compounds have fixed element ratios.
    a) Pure
    b) Mixed
    c) Chemical
    d) Physical
16. In __________, a gas changes into a liquid.
    a) melting
    b) freezing
    c) condensation
    d) sublimation
17. __________ atoms are of the same element but have different masses.
    a) Isotopes
    b) Ions
    c) Molecules
    d) Neutrons
18. Elements are made up of one type of __________.
    a) bond
    b) atom
    c) molecule
    d) isotope
19. Dalton’s atomic theory states that all matter is made of __________.
    a) cells
    b) molecules
    c) atoms
    d) ions
20. The empirical formula is the __________ ratio of atoms in a compound.
    a) molecular
    b) highest
    c) simplest
    d) largest

Part C: Theory Questions (Short Answer)

1. What is an atom?
2. Define covalent bond.
3. What does the atomic number represent?
4. What is a compound?
5. Describe the kinetic theory.
6. Name the three states of matter.
7. What is a molecule?
8. Explain the periodic table.
9. What is atomic mass?
10. Describe ionic bonding.
11. What is matter?
12. State the law of conservation of matter.
13. Define sublimation.
14. What are valencies?
15. What is an isotope?
16. How are elements grouped on the periodic table?
17. What is a chemical formula?
18. Explain the law of constant composition.
19. Define atomic structure.
20. What is the empirical formula?

Part D: True or False Questions

1. The atomic number is the number of protons. (True/False)
2. Matter has mass and occupies space. (True/False)
3. Electrons have a positive charge. (True/False)
4. Covalent bonds share electrons. (True/False)
5. The periodic table is organized by atomic mass. (True/False)
6. Gases have a fixed shape. (True/False)
7. Protons are in the nucleus of an atom. (True/False)
8. The atomic mass is the same as the atomic number. (True/False)
9. Atoms of the same element are identical. (True/False)
10. Metals conduct electricity. (True/False)
11. Molecules consist of two or more atoms. (True/False)
12. Chemical symbols represent elements. (True/False)
13. Sublimation is a change from liquid to gas. (True/False)
14. Electrons are found in the nucleus. (True/False)
15. Solid matter has a fixed volume. (True/False)
16. All compounds have the same properties. (True/False)
17. A mixture has fixed ratios of elements. (True/False)
18. The empirical formula is the simplest ratio. (True/False)
19. Atoms are destroyed in chemical reactions. (True/False)
20. Neutrons have no charge. (True/False)

Part E: Fill-in-the-Blank Questions (Without Options)

1. The basic unit of matter is the __________.
2. A __________ is a substance made of two or more elements.
3. __________ is a bond where atoms share electrons.
4. The __________ number is equal to the protons in an atom.
5. __________ bonds involve electron transfer.
6. Water is an example of a __________.
7. Protons have a __________ charge.
8. The __________ is a chart of all known elements.
9. An atom with no charge has equal numbers of protons and __________.
10. The atomic mass is the number of protons and __________.
11. Solid matter has a __________ shape and volume.
12. __________ is the change from solid to gas without a liquid state.
13. The simplest formula for a compound is the __________ formula.
14. A molecule with two atoms of hydrogen and one of oxygen is __________.
15. __________ are particles with no charge.
16. Elements with similar properties are in the same __________.
17. The kinetic theory explains the __________ of particles.
18. __________ is a measure of the amount of matter.
19. __________ holds atoms together in a molecule.
20. Elements are represented by __________ symbols.

This revision provides a comprehensive review with various question types to solidify the students’ understanding of the concepts covered in SS 1 Chemistry.