FIRST SEM

Question 1

Characteristics that can be observed or measured without changing the identity of the substance.

Answer 1

Physical properties

Question 2

Characteristics that can be observed during a chemical reaction of chemical changes.

Answer 2

chemical properties

Question 3

properties of matter that vary with the amount of substance

Answer 3

extensive properties

Question 4

properties that does not depend on the amount of substance rather on the type of matter itself.

Answer 4

intensive properties

Question 5

It has a fixed composition, and cannot be separated by physical means.

Answer 5

Pure substances

Question 6

it is made up of only one atom

Answer 6

elements

Question 7

it is made up of two or more atoms

Answer 7

compounds

Question 8

composed of two or more pure substances, and cannot be separated by physical means

Answer 8

mixtures

Question 9

it has a uniform composition. also called “solution”

Answer 9

homogenous

Question 10

it has a non uniform composition

Answer 10

heterogenous

Question 11

alterations in appearance

Answer 11

physical change

Question 12

alterations in the chemical composition

Answer 12

chemical change

Question 13

has definite shape and volume

Answer 13

solid

Question 14

has definite volume but no definite shape

Answer 14

liquid

Question 15

has no definite shape or volume

Answer 15

gas

Question 16

consists of highly ionized gas

Answer 16

plasma

Question 17

solid to liquid

Answer 17

melting

Question 18

gas to solid

Answer 18

deposition

Question 19

liquid to solid

Answer 19

freezing

Question 20

solid to gas

Answer 20

sublimation

Question 21

liquid to gas

Answer 21

vaporization

Question 22

gas to liquid

Answer 22

condensation

Question 23

chemical name of baking soda

Answer 23

sodium bicarbonate

Question 24

chemical name of borax

Answer 24

sodium tetraborate decahydrate

Question 25

chemical name of chalk and marble

Answer 25

calcium carbonate

Question 26

common name of table salt

Answer 26

sodium chloride

Question 27

common name of table sugar

Answer 27

sucrose

Question 28

common name of MSG

Answer 28

monosodium glutamate

Question 29

specialized method specifically used for separating magnetic materials

Answer 29

magnetic separation

Question 30

process used to separate solid components by centrifugal force.

Answer 30

centrifugation

Question 31

process of separating the components by allowing the insoluble substance to settle.

Answer 31

decantation

Question 32

process of separating the insoluble particles from a liquid using porous material such a filter paper

Answer 32

filtration

Question 33

liquid that passes through the filter paper

Answer 33

filtrate

Question 34

solid substance left in the filter paper

Answer 34

residue

Question 35

process of separating particles mixtures with different sizes.

Answer 35

sieving

Question 36

process used to separate liquids that are miscible in water from liquid that are non miscible.

Answer 36

separating funnel

Question 37

process separating components of homogenous liquids mixtures with different boiling points

Answer 37

distillation

Question 38

the mixture is separated into different fractions based on their boiling points

Answer 38

fractional distillation

Question 39

process of separating the components via partioning between mobile phase and stationary phase

Answer 39

chromatography

Question 40

simplest type of chromatography

Answer 40

paper chromatography