good revision for chemistry spm

1. What is the function of these food additives?
a) Colouring agents
b) preservatives
c) Anti oxidants
d) Flavouring agents
e) Stabilisers and
thickeners
a) To restore the colour of
original food
b) To destroy or prevent growth
of micro organisms in food
c) To prevention oxidation of
food by air
d) To to give or enhance the
flavour of food
e) To prevent food such as ice
cream from separating into layers
and to thicken soup or gravy

2. What type of food additives?
Colouring agents
preservatives
Anti oxidants
Flavouring agents
Stabilisers and thickeners
a) Benzoic acid
b) Pectin
c) Saccharin
d) aspartam
e) Ascorbic acid
Flavouring agents
f) tartrazine
f) Sodium nitrite preservatives

3. What type of food additives?
Colouring agents
preservatives
Anti oxidants
Stabilisers and thickeners
a) Azo compound
b) Vitamin E
c) Mono sodium glutamate
d) agar-agar
e) Gelatin
Flavouring agents
f) Sodium benzoate
Stabilisers and thickeners
g) Sulphur dioxide preservatives

4. What is the function of these traditional medicines?
a) lime
b) garlic
c) ginger
d) onions
e) Betel leaves-
daun sireh
a) To increase digestive juice
b) Has antibiotic property
c) To warm the body
d) To purift blood
e) Stop bleeding nose

5. What is the function of these modern medicines?
a) analgesics
b) antibiotics
c)
Psychotherapeutic
medicines
a) To relieve pain without affecting
consciousness
b) Kill bacteria
c) To treat
mental illness

6. a) stimulants
b) Anti
depressant
c) Antipsychotic
drug
a) To stimulate mental activity
b) To control worry,
fear, anxiety, panic
c) To treat
psychotic illness or
schizophrenia
c) Psychotherapeutic medicines

7. What type of modern medicines?
analgesics
Anti biotics
a) aspirin
b) Penicillin
c) streptomycin
d) Para cetamol
e) caffeine
f) codeine
g) barbiturate
Anti biotics
analgesics
stimulant
analgesics
antidepressant
h) tranquiliser antidepressant

8. What is the uses of modern medicines?
Fever, prevent heart
attack
fever
a) aspirin
b) Penicillin
c) streptomycin
d) Para cetamol
f) codeine
pneumonia Tuberculosis,
dysentry
Treat gonorrhea, syphlis,
pneumonia, meningitis
Cough medicine,
headache

9. Soap:
RCOO –
Na +
or R COO –
K +
Detergent:
What is general formula for
soap?
and detergent?

10. What does hard water contains?
•Hard water contains
calcium ion, Ca2+
or
magnesium ion, Mg2+.

11. Why do soaps form scum with
hard water?
• Soap reacts with calcium
ion, Ca2+
or magnesium ion,
Mg2+
in hard water to form
insoluble salt, called scum

12. Why is soap not effective in hard
water?
• Because formation of scum
reduce the amount of soap
for cleaning and thus wastage
of soap occur.

13. Why is detergent more effective than
soap in hard water?
• Detergent form soluble salt with
calcium ion, Ca2+
or
magnesium ion, Mg2+
in hard
water.
• Therefore the cleaning power is
not affected by hard water.

14. Below are some additives in detergents.
Fill in missing words
Additives Functions
1 Drying agents
( such as sodium
sulphate, sodium
silicate)
to keep the
powder………
……….
DRY

15. Additives Functions
2 Builders
( such as
Sodium
triphosphate)
……………
water.
softe
n

16. Additives Functions
3 Biological
enzymes
( such as
amylase,
lipase)
to digest
in dirt or to
modify fabric
feel
PROTEIN, FAT
OR
CARBOHYDRA
TE

17. Additives Functions
4 Such as
sodium
perborate
Convert
stains into
…………………
substances
colourles
s

18. Additives Functions
5 Perfumes Make clothes
smell
……………. And
clean
fres
h

19. Additives Functions
6.
Stabilizers
( such as
silicones)
Prevent
formation of
………………foam