Free Printable Integrated science

1.

Which of the following can be used to produce biodiesel as a biofuel?

a)

Maize oil

b)

Petroleum oil

c)

Coal

d)

Cellulose

2.

which of the following chemical equations represents a complete neutralization reaction?

a)

$HCL\ +\ NH_3\ \rightarrow\ NH_4CL$

b)

$2HCL\ +Na_2CO_3\ \rightarrow\ 2NaCL\ +\ H_2O+CO_2$

c)

$HCL\ +NaOH\rightarrow\ NaCL\ +H_2O$

d)

$2HCL\ +Zn\ \rightarrow ZnCL_{2_{ }}+H_2$

3.

Plants obtain nitrogen from the soil in the form of ........

a)

nitrates and nitrites

b)

nitrates and ammonia

c)

nitrates and nitrous oxide

d)

nitrates and nitrogen

4.

in the opposite figure a quantity of gas is trapped inside a thermally isolated and tightly sealed container by a movable piston. if the system exerts work of 30J to increase the volume of gas rapidly, then the values of ΔQ and ΔU respectively are

a)

30 J / 0

b)

0/ 30 J

c)

-30 J / 0

d)

0 / -30 J

5.

which of the following is considered the first step in the chemical waste disposal process?

a)

burning wastes in high temperature furnaces

b)

burying wastes in special landfills

c)

classification and separation of wastes

d)

monitoring the sites used for final disposal of wastes

6.

the ratio between the amount of energy transferred to the organisms at the top of food pyramid and the amount of energy in the organisms at the middle of the pyramid ........

a)

is greater then one

b)

is less than one

c)

equals one

d)

cannot be determined

7.

from the opposite reaction $C_2H_{2\left(g\right)}\ +\frac{5}{2\ }O_2\left(g\right)\rightarrow2CO_{2\left(g\right)}\ +H_2O_{\left(v\right)}$

knowing that the bond energy in unit kJ/mol

$\left(C\equiv C\right)=\ 835\ \left(C-H\right)=413\ \ \ \left(O=O\right)=498\ \ \ \ \left(C=O\ \right)\ =\ 745$

( O-H) = 467

What is the occurred change in heat content of combustion reaction of one mole of C₂H₂gas?

a)

-1008 kJ/mol

b)

-1240 kJ/mol

c)

+2906 kJ/mol

d)

+7052kJ/mol

8.

from the disadvantages of the action of the thermal electric power station is the consumption of large amount of

a)

electricity

b)

natural gas

c)

water

d)

carbon dioxide

9.

from the following equation

$2AL_2O_3\ +\ 3C\ \ \longrightarrow\ 4X\ +\ 3CO_2$

What does (X) represent?

a)

Alumina

b)

Aluminum

c)

Cryolite

d)

Hematite

10.

a student mentioned some of the methods to produce green hydrogen from water, as follows

(Ι) water electrolysis by using renewable energy resources

(II) water analysis in the absence of oxygen by using Enterobacter bacteria

(III) separation ( splitting) water into hydrogen and oxygen in the absence of sulphur by using Chlamydomonas alga

which of these methods are correct ?

a)

method (I) and (II)

b)

method (II) and (III)

c)

method (I) and (III)

d)

method (III) only

11.

which of the following characterizes CSP technology from the regular solar cells?

a)

it works by the stored electrical energy

b)

it works by the stored thermal energy

c)

batteries are used in it

d)

electricity is generated in it using sunlight

12.

what is the estimated percentage of the lost energy by moving from trophic level to next one in the food chain?

a)

10%

b)

50%

c)

90%

d)

100%

13.

which of the following conditions leads to the formation of nitrogen oxides (NO_X) during the burning of fossil fuels?

a)

Burning at low temperature

b)

Burning in the absence of oxygen

c)

Burning at high temperature

d)

Burning in the presence of large amount of water

14.

what is the average volume of the used silicon particles in the improvement of solar cells efficiency?

a)

50 millimeters

b)

75 millimeters

c)

50 nanometers

d)

100 nanometers

15.

based on what you have studied, if producing one ton of aluminum from bauxite requires about 15000 kilowatt-hour of energy, then recycling 4 tons of aluminum instead of producing it from bauxite saves approximately ......

a)

750 kilowatt-hour

b)

3000 kilowatt-hour

c)

57000 kilowatt-hour

d)

60000 kilowatt-hour

16.

which of the following is one of the basic components of biofuel?

a)

Hydrogen

b)

Chlorine

c)

Phosphorus

d)

Nitrogen

17.

Which of the following choices represent two physical quantities of extensive properties of a system in thermodynamics?

a)

Temperature and density

b)

Volume and density

c)

Temperature and internal energy

d)

Volume and internal energy

18.

What is the primary form of energy in each of the hydroelectric power plant and thermal electric power plant respectively?

a)

Chemical energy / kinetic energy

b)

Kinetic energy / chemical energy

c)

Potential energy / kinetic energy

d)

Potential energy / chemical energy

19.

A solar cell has dimensions of 10 cm X 10 cm with a potential difference between its surfaces of 0.5 V.A current of 2.5 A passes through its circuit when the optical power falling on it is 800 W for every cubic meter , then the efficiency of solar cell is about ……

a)

24.6%

b)

15.6%

c)

12.3%

d)

10.2%

20.

We can obtain biofuels in gaseous state from treating waste of animal barns by using……

a)

Methane-producing bacteria

b)

Microalgae

c)

Acids

d)

Bases

Integrated science

Total questions: 20

Worksheet time: 20mins

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