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Tenth Grade (Grade 10) Chemistry Questions

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Grade 10 Biochemical Pathways
Living things get the energy they need from
  1. oxygen.
  2. NAD+.
  3. food.
  4. air.
Grade 10 Periodic Table and Elements
The ionic radius trend for the groups on the periodic table is that                                      .
  1. it increases as you go down the group
  2. it decreases as you go down the group
  3. there is none
  4. they are all the same for one group
Grade 10 Reactions
Chemical reactions that absorb heat are called                 reactions.
  1. homogeneous
  2. heterogeneous
  3. exothermic
  4. endothermic
Grade 10 Atomic Structure

This question is a part of a group with common instructions. View group »

In a famous experiment conducted by Ernest Rutherford, positively charged alpha particles were scattered by a thin gold foil. Which of the following is a conclusion that resulted from this experiment?
  1. The nucleus is negatively charged.
  2. The atom is a dense solid and is indivisible.
  3. The mass is conserved when atoms react chemically.
  4. The nucleus is very small and the atom is mostly empty space.
Grade 10 Biochemical Pathways
The process of cellular respiration
  1. occurs only in animals.
  2. is performed only by organisms that cannot perform photosynthesis.
  3. occurs in all organisms.
  4. converts chemical energy in food to usable energy (ATP) in all organisms.
Grade 10 Periodic Table and Elements
The ground state electron configuration of Fe is                            .
  1. 1s2 2s2 3s2 3p6 3d6
  2. 1s2 2s2 2p6 3s2 3p6 4s2 3d6
  3. 1s2 2s2 2p6 3s2 3p6 4s2 4d6
  4. 1s2 2s2 2p6 3s2 3p6 4s2
Grade 10 Properties of Matter
All of the following are physical properties except                .
  1. color
  2. density
  3. melting point
  4. ability to burn
Grade 10 Periodic Table and Elements
Why do alkaline earth metals have similar chemical properties?
  1. The are in the same group.
  2. Their salts are color less.
  3. The have the same number of valence electrons.
  4. They are very reactive.
Grade 10 Macromolecules
An organic compound made of sugar molecules is a
  1. carbohydrate.
  2. lipid.
  3. protein.
  4. nucleic acid.
Grade 10 Periodic Table and Elements
What are the horizontal rows of the periodic table called?
  1. Groups
  2. Lines
  3. Periods
  4. Periodic law
Grade 10 Matter
The partial pressure of a gas in a mixture of gases placed in a vessel is                                                                                           .
  1. the ratio of the pressure exerted by this gas to the total pressure exerted by the mixture
  2. the total pressure diminished by the pressure of this gas
  3. the pressure a gas would exert if it were alone in the vessel.
  4. the negative pressure exerted by the gas in the mixture
Grade 10 Matter
What are the 3 states of matter?
  1. solid, isotope, and ion
  2. gas, liquid, water
  3. solid, liquid, gas
  4. solid, gas, and air
Grade 10 Periodic Table and Elements
Caesium, Cs, is an element in Group I of the Periodic Table. When caesium reacts it forms a positive ion, Cs+. How is a caesium ion formed?
  1. A caesium atom gains a proton
  2. A caesium atom gains an electron
  3. A caesium atom loses an electron
  4. A caesium atom shares an electron
Grade 10 Periodic Table and Elements
Sodium, mercury, argon, and neon are used in the production of lamps. There are fewer safety guidelines regarding the handling of neon and argon than for mercury and sodium. Which of the following best describes the elements within the group of the Periodic Table that contains neon and argon gas?
  1. Gaseous at room temperature and highly reactive with metals
  2. Solid at room temperature and mildly reactive with strong acids
  3. Gaseous at room temperature and mostly unreactive with metals
  4. Solid at room temperature and mostly unreactive with strong acids
Grade 10 Molecules and Compounds
A molecule is the smallest complete unit of a(n)                .
  1. compound
  2. matter
  3. atom
  4. property
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