Welcome to your Grade 10 Chemistry chapter 1
After carefully reading the following 30 questions, choose the correct answer.
1.
What is the sum of the atomic masses of all the atoms present in a molecule?
2.
Which type of reaction involves the exchange of ions between two compounds to form two new compounds?
3.
What is the term for the reactant that is completely consumed in a chemical reaction?
4.
Which of the following is defined as the loss of electrons by a substance?
5.
What is the molar volume of any gas at STP?
6.
Which law states that the total mass of reactants is equal to the total mass of products?
7.
What is the ratio of the actual yield to the theoretical yield multiplied by 100?
8.
In a redox reaction, what happens to the oxidizing agent?
9.
Which formula represents the simplest whole-number ratio of atoms in a compound?
10.
What is the value of Avogadro's number?
11.
What numerical value is assigned to the oxidation state of an element in its free state?
12.
Which process is the gain of electrons?
13.
A reaction in which a single compound breaks down into two or more simpler substances is called:
14.
What are the starting substances in a chemical reaction called?
15.
In the equation 2H2 + O2 → 2H2O, what is the molar ratio of H2 to H2O?
16.
Which of these is a non-redox reaction?
17.
What is the mass in grams of one mole of a substance?
18.
Which method uses the least common multiple of numbers of atoms to balance equations?
19.
In a balanced chemical equation, the number of atoms of each element on the reactant side must be:
20.
The calculated amount of product obtained from a balanced equation is the:
21.
Which reaction type involves two or more substances combining to form a single substance?
22.
What is the oxidation number of Hydrogen in most compounds?
23.
In stoichiometry, "mass-mass" problems involve converting:
24.
What type of reaction is represented by AB + C → AC + B?
25.
The sum of the atomic masses of the atoms in an ionic compound's formula unit is called:
26.
Which substance acts as a reducing agent?
27.
What is the unit of molar mass?
28.
Which of the following defines a chemical equation?
29.
What is the coefficient of O2 when the equation C3H8 + O2 → CO2 + H2O is balanced?
30.
Which of these is an example of a decomposition reaction?
