Free Printable Chemistry second block review

1.

Substances that interact together in a chemical reaction. ___________________________

a)

a) precipitate

b)

b) equation

c)

c) coefficients

d)

d) reactant

2.

Substances that are the result of a chemical reaction_______________________

a)

a) subscript

b)

b) product

c)

c) coefficients

d)

d) reactant

3.

Symbolic representation of the type and amount of reactants and products in a chemical reaction.

a)

a) precipitate

b)

b) equation

c)

c) coefficients

d)

d) reactant

4.

They tell the amount of atoms of the elements in a molecule. Written below and to the right of a chemical formula.

a)

a) subscript

b)

b) product

c)

c) coefficients

d)

d) reactant

5.

5- Insoluble solids that are deposited from a solution after a chemical reaction or a change in temperature ___________________

a)

equation

b)

coefficients

c)

reactant

d)

precipitate

6.

Contains ions of magnesium/ and or calcium…

a)

lime scale

b)

Soft water

c)

Hard water

d)

soap scum

7.

Absorb energy from the surroundings, the temperature of the reactants is less than the temperature of the products

a)

a) Exothermic reactions

b)

b) Endothermic reactions

8.

Refers to the part that is exposed on a solid substance during a reaction

a)

a) Activation energy

b)

b) Surface Area

c)

c) Reaction rate

d)

d) reactant

9.

Substance that speeds up the rate of a reaction.

a)

a) Electrolyte

b)

b) Oxygen

c)

c) Ionic solids

d)

d) catalyst

10.

“the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.”

a)

Newton's 3rd law of motion

b)

Boyle’s Law

c)

l aw of conservation of mass.

d)

Avogadro’s Law

11.

For every action, there is an equal and opposite reaction.

a)

a) Newton's 3rd law of motion

b)

b) l aw of conservation of mass.

c)

c) Boyle’s Law

d)

d) Avogadro’s Law

12.

This substance is found in most living cells, it is an enzyme that breaks down harmful Hydrogen peroxide in to Oxygen gas and water

a)

a) Non-electrolyte

b)

b) Oxigen

c)

c) catalase

d)

d) catalyst

13.

One of the uses of catalyst is to remove pollutants, from the exhaust of automobiles; devices that do this are called:

a)

a) Engine

b)

b) alternator

c)

c) catalytic converter

d)

d) radiator

14.

Substance that enables a chemical reaction to happen more quickly or with less energy

a)

a) Enzyme

b)

b) catalyst

c)

c) indicator

d)

d) reactant

15.

Minimum amount of energy required to start a reaction

a)

a) Kinetic energy

b)

b) chemical energy

c)

c) activation energy

d)

d) collision energy

16.

What does not alter reaction rate?

a)

a) A change in temperature

b)

b) a change in surface area

c)

c) the presence of catalyst

d)

d) the number of products

17.

What happens when you use soap with hard water?

a)

a) lots of suds are produced

b)

b) water soluble compounds form

c)

c) calcium ions are produced

d)

d) soap scum forms

18.

An increase in temperature increases kinetic energy, in the contrary, lower temperature decreases kinetic energy.

a)

a) True

b)

b) false

19.

The following are Balanced equations:

Zn + 2HCl---> ZnCl2 + H2

a)

a) True

b)

b) false

20.

Na₃PO₄ + 3 HCl → 3 NaCl + H₃PO₄

a)

a) True

b)

b) false

21.

Na2CO3 + HCl → NaCl + H2O + CO2

a)

a) true

b)

b) false

22.

Al + HCl → AlCl3 + H2

a)

a) true

b)

b) false

23.

6CO2 + H2O → C6H12O6 + O2

a)

a) true

b)

b) false

24.

KClO3 → KClO4 + KCl

a)

a) true

b)

b) false

25.

H2SO4 + HI → H2S + I2 + 4H2O

a)

a) true

b)

b) true

Chemistry second block review

Total questions: 25

Worksheet time: 13mins

Similar Resources on Wayground