MULTIPLE CHOICE QUESTIONS

Question 1

The rate at which a chemical reaction occurs may be increased by:

Answer 1

by grinding the solid reactant into fine powder.

Question 2

A Catalyst:

Answer 2

increases the rate of reaction without being consumed, is not a reactant, and provides an easier path for the reaction to follow.

Question 3

What type of reaction occurs between zinc metal and hydrochloric acid?

Answer 3

Single displacement

Question 4

What type of reaction occurs between sodium and fluorine gas?

Answer 4

Synthesis

Question 5

a pH of 1.5 would indicate that the substance being tested is:

Answer 5

Strongly acidic

Question 6

WHich of the following has pure covalent bonding? CH4 or HBr or MgF2 or N2 or H2O

Answer 6

N2

Question 7

What colour would phenolphtalein be if added to potassium hydroxide?

Answer 7

Pink

Question 8

The reaction between an acid and a base produces…

Answer 8

water and salt

Question 9

What is the formula for the compound sodium sulfate?

Answer 9

Na2SO4

Question 10

Element X reacts with oxygen gas to form compound Y. Compound Y reacts with water to form a solution that turns red litmus blue. WHat is COmpound Y? A metal or a base or a non metal or a metal oxide or acidic oxide?

Answer 10

A metal oxide

Question 11

Element x reacts with oxygen gas to form compound y. Compound y reacts with water to form a solution that turns bromothymol blue yellow. What is element x? a metal or non metal or metal oxide or acidic oxide or a base?

Answer 11

A non metal

Question 12

The rx’n between potassium iodide and lead nitrate solutions would be an example of

Answer 12

a double displacement reaction

Question 13

A property of a covalent compound is…

Answer 13

They have low melting point,

Question 14

A metallic atom generally becomes positive by

Answer 14

losing electrons

Question 15

What is an ion an ion that contains more than one atom called?

Answer 15

a polyatomic atom

Question 16

What type of reaction is the burning of hydrocarbon in oxygen called?

Answer 16

a combustion reaction

Question 17

what is the scale that describes the acidity of a solution as a number?

Answer 17

the pH scale

Question 18

The starting materials in a chemical reaction are called

Answer 18

reactants

Question 19

Bases produce _____ ions while acids produce _________ ions

Answer 19

positive, negative

Question 20

What is a substance called that changes colours in acids or bases?

Answer 20

indicator

Question 21

Covalent bonds with an unequal sharing of electrons are said to be…

Answer 21

polar covalent

Question 22

state 2 common acids

Answer 22

lemon juice and apple juice

Question 23

state 2 common bases

Answer 23

windex, drain cleaner

Question 24

Which source produces light using ultraviolet rays?

Answer 24

fluoresence

Question 25

WHat is the line called from which the angle of incidence is measured

Answer 25

normal