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WorksheetsFinal Revision G9 Term 2
Total questions: 25
Worksheet time: 13mins
At the beginning of the reaction, the ratio of the reactants concentration equals _______
100 %
0 %
50 %
no correct answer
_________ is chemically composed of the nucleic acid DNA combined with protein
cytoplasm
chromosome
Gene
Nucleus
The two factors of a hereditary trait are different in the ________ individual
dominant pure
recessive
hybrid
dominant pure and recessive
Thermal decomposition of copper carbonate gives _________
copper + water
copper + carbon dioxide
copper oxide + carbon dioxide
copper oxide + water vapour
From the examples of electrochemical cells is the _______
dry cell
dynamo
rheostat
ohmmeter
The recessive trait appears on one of the sons if he inherited ________ from the parents
two dominant genens
only one dominant gene
two recessive genes
a recessive gene and a dominant gene
The hormone whose deficiency causes enlargement of the thyroid gland is ________
estrogen
thyroxin
insulin
To control the value of the electric resistance in the electric circuit, we use ________ instrument
ohmmeter
rheostat
voltmeter
The most active metal in the chemical activity series is _________
copper
Potassium
hydrogen
aluminium
Active metal substitutes hydrogen of water and produce metal hydroxide and _________gas evolves
N2
O2
H2
CO2
The _________ hormone liberates the energy necessary for the body from food
growth
estrogen
thyroxin
glucagon
The two scientists ________ discovered how do the genes perform their functions
Watson and crick
Badel and crick
Badel and Tatum
Watson and bequrrel
On adding silver nitrate solution to sodium chloride solution , a ________ precipitate is formed
red
black
blue
white
________ element shares in composing thyroxin hormone
Iodine
Iron
sodium
The substance that changes the rate of the reaction without itself being changed is known as the _________
oxidizing agent
reducing agent
catalyst
In dynamo, the ________ energy is converted into electric energy
magnetic
chemical
kinetic
light
When sodium atom loses an electron from its outermost energy level, it becomes ________
a) oxidized
b) reducing agent
c) reduced
a and b are correct
Which of the following traits is dominant in human being ?
smooth hair
absence of dimples
wide eyes
presence of freckles
In the electric cell, _______- energy is converted into electric energy
kinetic
magnetic
chemical
light
The genetic structure of wrinkled yellow colored seeds of a pea plant is ________
yySS
YYSS
yyss
YYss
At the end of the chemical reaction, the concentration of the reactants is _______ %
zero
50
75
100
Covalent compounds are _______ in their reactions
fast
slow
no correct answer
The ability to roll tongue is one of the ________ traits in human being
dominant
recessive
hybrid
hermaphrodite
Iron filings with diluted hydrochloric acid faster than a piece of iron has the same mass due to the ________
increase in concentration
presence of catalyst
increase in surface area
no correct answer
The ______ effect of radiation are results of changing the sex chromosomes
physical
cellular
genetic
