grade 10 CHEM test for exam

Question 1

florine has a charge of

Answer

2P4 + 3O2 = 4P2O5

Answer

5P + 1O2 = 3P2O5

Answer

Cl2 + 2NaBr = Br2 + 2NaCl

Answer

AB + CD = AD + CB

Answer

impossible to reverse

Answer

substance breaks down

Answer

metalloids

Question 2

the more acidic a substance the more ___ ions it has

Type answer (8 letters)

Question 3

what is it called when two non metals form a compund

Type answer (19 letters)

Question 4

which is a balanced equation of P4 + O2 = P2O5

P4 + 5O2 = 2P2O5

Question 5

what is the chemical equation for potassium metal and chlorine gas combine to form potassium chloride.

Type answer (13 letters)

Question 6

metals tend to

Type answer (14 letters)

Question 7

copper has ionic charges of

Type answer (5 letters)

Question 8

lewis dot diagrams only show

Type answer (17 letters)

Question 9

the more basic a substance is the more ___ ions it has

Type answer (9 letters)

Question 10

what is an example of a skeleton equation?

Select the two correct answers

NaCl + 2Na + Cl

2NaCl = 2Na + 2 CL

Question 11

what color does bromythymol blue turn in a acid

Type answer (6 letters)

Question 12

what deadly gas is in a incomplete combustion?

Type answer (2 letters)

Question 13

a neutralization reaction produces

Type answer (14 letters)

Question 14

example of single displacement

A + BC = AC + B

Question 15

sign of a chemical change

Select the five correct answers

Question 16

whaat do you need in order to produce a combustion equation?

Type answer (11 letters)

Question 17

what color does phenolphtalein turn in a acid neutral and basic solution?

Type answer (24 letters)

Question 18

what type of chemical reaction is this? Na + Cl = NaCl

Type answer (9 letters)

Question 19

what is the chemical formula for carbonate?

Type answer (6 letters)

Question 20

what is on the left side of a word and chemical equation?

Type answer (9 letters)

Question 21

sodium and nitrogen produce

Na3N

Na2N3

NaN2

Question 22

metals are on the left side of the periodic table

true

false

Question 23

pure substances break into

Select the three correct answers