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Tenth Grade (Grade 10) Chemistry Questions

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Grade 10 Periodic Table and Elements
The alkaline earth metal in period 5 is                .
  1. Vanadium
  2. Niobium
  3. Rubidium
  4. Strontium
Grade 10 Macromolecules
Carbohydrates are made up of the three elements of
  1. nitrogen, oxygen, and hydrogen.
  2. carbon, hydrogen, and oxygen.
  3. sulfur, hydrogen, and oxygen.
  4. nitrogen, phosphorus, and oxygen.
Grade 10 Macromolecules
Which biological polymer is made of bonded amino acids?
  1. protein
  2. amino acid
  3. DNA
  4. sugar cube
Grade 10 Reactions
In what type of reaction does one reactant form two or more products?
  1. single replacement
  2. decomposition
  3. synthesis
  4. double replacement
Grade 10 Molecules and Compounds
Water acts as a solvent of ionic compounds because                                                    .
  1. water molecules are polar
  2. water takes the shape of its container
  3. water is found in three states of matter
  4. water is a liquid over a wide range of temperatures
Grade 10 Thermodynamics
Which phase change involves a solid directly changing into a gas?
  1. Deposition
  2. Sublimation
  3. Condensation
  4. Evaporation
Grade 10 Macromolecules
Which macromolecule holds genetic information?
  1. nucleic acids
  2. carbohydrates
  3. lipids
  4. proteins
Grade 10 Reactions
To balance a chemical equation, you may adjust the
  1. coefficients.
  2. subscripts.
  3. formulas of the product.
  4. either of coefficients or subscripts.
Grade 10 Atomic Structure
If you add an additional neutron to an atom, what do you create?
  1. a new element
  2. an isotope
  3. a reaction
  4. an ion
Grade 10 Periodic Table and Elements
The sum total of protons and neutrons in an atom is referred to as the                .
  1. atomic number
  2. atomic mass
  3. mass number
  4. molar mass
Grade 10 Kinetics and Equilibrium
As ice cools from 273 K to 263 K, the average kinetic energy of its molecules will                .
  1. decrease
  2. increase
  3. remain the same
  4. start over
Grade 10 Macromolecules
A carbohydrate is an organic compound because it contains
  1. phosphorus.
  2. carbon.
  3. hydrogen.
  4. oxygen.
Grade 10 Quantum Physics and the Atom

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

Which of the following represents a correct ground-state electron configuration for a silicon atom?
  1. 1s22s22p63s23p64s2
  2. 1s22s22p43s23p4
  3. 1s22s22p63s23p2
Grade 10 Biochemical Pathways
Living things get the energy they need from
  1. oxygen.
  2. NAD+.
  3. food.
  4. air.
Grade 10 Molecules and Compounds
What is the correct name for the compound MgO?
  1. magnesium trioxide
  2. dimagnesium trioxide
  3. magnesium oxide
  4. magnesium oxygen
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
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