grade 10 CHEM test for exam

Question 1

what color does bromythymol blue turn in a acid

Type answer (6 letters)

Answer

2P4 + 3O2 = 4P2O5

Answer

5P + 1O2 = 3P2O5

Answer

impossible to reverse

Answer

substance breaks down

Answer

Cl2 + 2NaBr = Br2 + 2NaCl

Answer

AB + CD = AD + CB

Answer

metalloids

Question 2

metals are on the left side of the periodic table

true

false

Question 3

which is a balanced equation of P4 + O2 = P2O5

P4 + 5O2 = 2P2O5

Question 4

metals tend to

Type answer (14 letters)

Question 5

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

Type answer (9 letters)

Question 6

what is the chemical formula for carbonate?

Type answer (6 letters)

Question 7

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

Type answer (13 letters)

Question 8

what deadly gas is in a incomplete combustion?

Type answer (2 letters)

Question 9

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

Type answer (9 letters)

Question 10

what is it called when two non metals form a compund

Type answer (19 letters)

Question 11

a neutralization reaction produces

Type answer (14 letters)

Question 12

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

Type answer (9 letters)

Question 13

sign of a chemical change

Select the five correct answers

Question 14

what is an example of a skeleton equation?

Select the two correct answers

NaCl + 2Na + Cl

2NaCl = 2Na + 2 CL

Question 15

lewis dot diagrams only show

Type answer (17 letters)

Question 16

sodium and nitrogen produce

Na3N

Na2N3

NaN2

Question 17

the more acidic a substance the more ___ ions it has

Type answer (8 letters)

Question 18

example of single displacement

A + BC = AC + B

Question 19

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

Type answer (24 letters)

Question 20

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

Type answer (11 letters)

Question 21

florine has a charge of

Question 22

copper has ionic charges of

Type answer (5 letters)

Question 23

pure substances break into

Select the three correct answers