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Final Revision G9 Term 2

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

At the beginning of the reaction, the ratio of the reactants concentration equals _______

a)

100 %

b)

0 %

c)

50 %

d)

no correct answer

2.

_________ is chemically composed of the nucleic acid DNA combined with protein

a)

cytoplasm

b)

chromosome

c)

Gene

d)

Nucleus

3.

The two factors of a hereditary trait are different in the ________ individual

a)

dominant pure

b)

recessive

c)

hybrid

d)

dominant pure and recessive

4.

Thermal decomposition of copper carbonate gives _________

a)

copper + water

b)

copper + carbon dioxide

c)

copper oxide + carbon dioxide

d)

copper oxide + water vapour

5.

From the examples of electrochemical cells is the _______

a)

dry cell

b)

dynamo

c)

rheostat

d)

ohmmeter

6.

The recessive trait appears on one of the sons if he inherited ________ from the parents

a)

two dominant genens

b)

only one dominant gene

c)

two recessive genes

d)

a recessive gene and a dominant gene

7.

The hormone whose deficiency causes enlargement of the thyroid gland is ________

a)

estrogen

b)

thyroxin

c)

insulin

8.

To control the value of the electric resistance in the electric circuit, we use ________ instrument

a)

ohmmeter

b)

rheostat

c)

voltmeter

9.

The most active metal in the chemical activity series is _________

a)

copper

b)

Potassium

c)

hydrogen

d)

aluminium

10.

Active metal substitutes hydrogen of water and produce metal hydroxide and _________gas evolves

a)

N2

b)

O2

c)

H2

d)

CO2

11.

The _________ hormone liberates the energy necessary for the body from food

a)

growth

b)

estrogen

c)

thyroxin

d)

glucagon

12.

The two scientists ________ discovered how do the genes perform their functions

a)

Watson and crick

b)

Badel and crick

c)

Badel and Tatum

d)

Watson and bequrrel

13.

On adding silver nitrate solution to sodium chloride solution , a ________ precipitate is formed

a)

red

b)

black

c)

blue

d)

white

14.

________ element shares in composing thyroxin hormone

a)

Iodine

b)

Iron

c)

sodium

15.

The substance that changes the rate of the reaction without itself being changed is known as the _________

a)

oxidizing agent

b)

reducing agent

c)

catalyst

16.

In dynamo, the ________ energy is converted into electric energy

a)

magnetic

b)

chemical

c)

kinetic

d)

light

17.

When sodium atom loses an electron from its outermost energy level, it becomes ________

a)

a) oxidized

b)

b) reducing agent

c)

c) reduced

d)

a and b are correct

18.

Which of the following traits is dominant in human being ?

a)

smooth hair

b)

absence of dimples

c)

wide eyes

d)

presence of freckles

19.

In the electric cell, _______- energy is converted into electric energy

a)

kinetic

b)

magnetic

c)

chemical

d)

light

20.

The genetic structure of wrinkled yellow colored seeds of a pea plant is ________

a)

yySS

b)

YYSS

c)

yyss

d)

YYss

21.

At the end of the chemical reaction, the concentration of the reactants is _______ %

a)

zero

b)

50

c)

75

d)

100

22.

Covalent compounds are _______ in their reactions

a)

fast

b)

slow

c)

no correct answer

23.

The ability to roll tongue is one of the ________ traits in human being

a)

dominant

b)

recessive

c)

hybrid

d)

hermaphrodite

24.

Iron filings with diluted hydrochloric acid faster than a piece of iron has the same mass due to the ________

a)

increase in concentration

b)

presence of catalyst

c)

increase in surface area

d)

no correct answer

25.

The ______ effect of radiation are results of changing the sex chromosomes

a)

physical

b)

cellular

c)

genetic