An acid is an electrolyte because

it can conduct and electric current

Chemistry is the study of

the composition of substances and their effects

An atom is electrically neutral because it has

the same number of protons and electrons

A characteristic of organic acids is that

they contain the element carbon

I.Anatomy is a very important science in the field of biology.II.Anatomy is the science which deals with the functions

I is correct and II is incorrect

Which one of the following belongs to the science of chemistry?

the alteration of the structure of molecules

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Questions 47

Answers

1
If a metal-oxide is dissolved in water it forms:
an alkali
a salt
an alkali
an acid
2
Characteristics of life include
growth and oxidation
radiation and oxidation
radiation and metabolism
growth and metabolism
3
An organic acid contains the chemical group
COH
OH
CO2
COOH
4
An acid is an electrolyte because
it doesn't split into ions when dissolved in water
it can conduct and electric current
it's molecules contain metal atoms
it cannot change the color of the indicator paper
5
Organic acids are found in:
earth and plants
earth and air
sebum and plants
sebum and air
6
A substance formed by uniting two elements chemically is known as a/an
molecule
compound
mixture
atom
7
Science deals mainly with:
anatomy and chemistry
physics and chemistry
anatomy and physiology
Physics and physiology
8
The study of functions of living organisms is
anatomy
microscopy
biology
physiology
9
Examples of mineral substances are:
paraffins and petroleum
carbohydrates and petroleum
Carbohydrates and plastics
paraffins and plastics
10
Condensation is the change of matter from
a gas to a liquid
a gas to a solid
a solid to a liquid
a liquid to a solid
11
An example of an inorganic acid is
sulphuric acid
palmitic acid
linoleic acid
stearic acid
12
The field of physics includes
the science of cytology
the science of nutrition
the science of diseases
the science of electricity
13
The predominant bonding of atoms in inorganic compounds is known as
unsaturated
ionic
double
covalent
14
A cation is
a positively charged atom
a negatively charged atom
a positively charged electron
a negatively charged electron
15
An anode is
a positively charged electrode
a negatively charged atom
a positively charged atom
a negatively charged electrode
16
The valency of oxygen is
1
2
4
3
17
Chemistry is the study of
living matter
the composition of substances and their effects
the properties of matter and energy
the science of life
18
Melting is the change of matter from:
a liquid to a solid
a solid to a liquid
a gas to a liquid
a gas to a solid
19
Examples of electrolytes are
acids and salts
alcohols and salts
alcohols and esters
acids and esters
20
The smallest part of a compound which still has the same properties of that compound is a/an
electron
molecule
ion
atom
21
The study of the structure of the body is called
physiology
physiotherapy
psychology
anatomy
22
Oil and fat combined together in a cream form is an example of
a compound
syntesis
a solvent
a mixture
23
The nucleus of an atom contains
protons and neutrons
protons and electrons
electrons only
electrons and neutrons
24
Which one of the following is not an element?
nitrogen
oxygen
carbon
water
25
A cathode is
a positively charged atom
a negatively charged atom
a negatively charged electrode
a positively charged electrode
26
An atom is electrically neutral because it has
the same number of protons and neutrons
more protons than electrons
more electrons than protons
the same number of protons and electrons
27
A characteristic of organic acids is that
they contain the element carbon
they may never be used in cosmetic products
they are strong acids
they are found only in plants
28
The field of physics includes
micro-organisms and electricity
micro-organisms and diseases
heat and diseases
heat and electricity
29
An example of an alkaline substance is
sweat
soap
lanolin
salt
30
Vaporization is the change of matter from
solid to liquid
gas to solid
gas to liquid
liquid to gas
31
Rusting of iron is caused by:
ionisation
electolysis
reduction
oxidation
32
Sublimation is the change of matter from:
a gas to a solid
a solid to a gas
a liquid to a gas
a liquid to a solid
33
An example of an element is
water
oxygen
carbon dioxide
ozone
34
I.Anatomy is a very important science in the field of biology.II.Anatomy is the science which deals with the functions
I is correct and II is incorrect
I and II are both correct
I and II are both correct
I is incorrect and II is correct
35
Which one of the following belongs to the field of physics?
heat, micro organisms, and sound
sound, electricity, and heat
electricity, heat, and micro organisms
micro organisms, sound, and electricity
36
Examples of synthetic substances are
paraffins and silicone
plastics and petroleum
plastics and silicones
paraffins and petroleum
37
An anion
a positively charged atom
A negatively charged atom
a positively charged electrode
a negatively charged electrode
38
pH can be decreased by:
withdrawing oxygen
adding oxygen
decreasing hydrogen-ions
Increasing hydrogen-ions
39
The letter P in pH means
potential
product
phosphorus
weight
40
Which of the following consists mainly of hydrocarbons?
mineral oil
lavender oil
almond oil
olive oil
41
A substance which chemically cannot be broken down into simpler substances is called
a mixture
a compound
an emulsion
an element
42
Examples of organic biological substances are
carbohydrates and paraffins
salt and paraffins
carbohydrates and fats
salt and fat
43
The basic unit of all matter is the
atom
base
element
proton
44
Which one of the following is an ionic compound?
water
methane
carbon dioxide
sodium hydroxide
45
The alteration of the properties of matter without the formation of any new substance is called
chemical change
physical change
chemical change
oxide mixture
46
Which one of the following belongs to the science of chemistry?
the condensation of vapor
the alteration of the structure of molecules
the condensation of electricity along a wire
the production of rays in the environment
47
The smallest part of an atom that can exist is the
neutron
atom
proton
electron

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