| 1 |
Which is unnecessary for purification of water for drink purposes:
|
coagulation <br>
aeration <br>
treatment with lodine <br>
treatment with chlorine <br>
|
| 2 |
Which one of the following is not a component of environment:
|
biosphere <br>
stratosphere <br>
hydrosphere <br>
lithosphere <br>
|
| 3 |
Which factor is helping to reduce the environmental pollution:
|
urbanization <br>
industrialization <br>
increases of plantation <br>
rapid growth of population <br>
|
| 4 |
A sing chlorine free radical can destroy how many ozone molecules:
|
10
100
1000
10000
|
| 5 |
New3spapers can be recycled again and again by how many times?
|
5
3
2
4
|
| 6 |
Fungicides re the pesticides which:
|
kill plants <br>
kill herbs <br>
kill insects <br>
control the growth of fungus <br>
|
| 7 |
What is the effect of polluted air on environment:
|
ozone <br>
acid rain<br>
global warming <br>
smog <br>
|
| 8 |
The gasses in the atmosphere are essential for sustaining life on earth; Thus oxygen is required for breathing, What for is carbon dioxide required?
|
to help plant to under go photosynthesis <br>
to destroy nitrogen oxide form the atmosphere <br>
to help to clean to atmosphere <br>
to help in fixing of bacteria <br>
|
| 9 |
In big/metropolitan cities, atmosphere is mostly polluted due to:
|
radioactive fall out <br>
household waste <br>
pesticide residue <br>
automobile exhausts <br>
|
| 10 |
The reason of acid rain is:
|
release of CO in excess by in complete combustion<br>
excess release of NO<sub>2</sub> and SO<sub>2</sub> from burning of fossil fuels<br>
Formation of NH<sub>3</sub> in excess form industry and coal gas <br>
Formation of excess CO<sub>2</sub> due to combustion and respiration <br>
|
| 11 |
Cyclone collector is used to reduce:
|
noise pollution <br>
air pollution <br>
water pollution <br>
radioactive pollution <br>
|
| 12 |
The pH range of the acid rain is:
|
6.5 __ 6<br>
Less than 5<br>
8 __ 7.5 <br>
7 __ 6.5<br>
|
| 13 |
Proxy acetyl nitrat5e (PAN) is an irritant to human beings and it affects:
|
nose <br>
stomach <br>
eyes <br>
ears <br>
|
| 14 |
Ecosytem is a smaller unity of:
|
nydosphere <br>
biosphere <br>
lithosphere <br>
atmosphere <br>
|
| 15 |
The temperature in the incineration of industrial and hazardons waster process had a range:
|
950 to 1300°C<br>
500 to 900°C<br>
250 to 500°C<br>
900 to 1000°C<br>
|
| 16 |
Choose the correct statement:
|
SO<sub>2</sub> affects the nucleus <br>
SO<sub>2</sub> affects plasmodesmate <br>
SO<sub>2</sub> affects cell wall <br>
SO<sub>2</sub> affects all membrane systems <br>
|
| 17 |
Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases?
|
NO<sub>2</sub>
SO<sub>2</sub>
Hg <br>
Pb <br>
|
| 18 |
Which one of the following does not act as pollutant?
|
carbon monoxide <br>
sulphur dioxide <br>
hydrocarbons <br>
carbon dioxide <br>
|
| 19 |
Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of:
|
2 days <br>
6 days<br>
5 days<br>
7 days <br>
|
| 20 |
The main pollution leather tanneries in the waste water is due to the salt of:
|
chromium <br>
copper <br>
calcium <br>
lead <br>
|
| 21 |
Potable water is considered to be:
|
safe for human consumption <br>
the ground water <br>
the Surface water <br>
now water is due to the salt of:<br>
|
| 22 |
A solid nitrate fertilizer reacts with an alkali to produce a gas which turns damp pH paper blue:
|
NO<sub>3</sub>
NHO<sub>3</sub>
NH<sub>2</sub>O
N<sub>2</sub>H<sub>4</sub>O<sub>3</sub>
|
| 23 |
The nitrogen present in some fertilizer helps plants:
|
to fight against diseases <br>
to produce fat <br>
to undergo photosynthesis <br>
to produce protein <br>
|
| 24 |
The fertilizer contains 33___35%n is:
|
ammonium nitrate <br>
potassium nitrate <br>
urea <br>
ammonia <br>
|
| 25 |
In Pakistan consumption per person is:
|
8kg <br>
5kg <br>
10kg <br>
6kg <br>
|
| 26 |
Hexamethylene reacts with _______ to prepare nylon 6,6
|
acetic acid <br>
adipic acid <br>
formic acid <br>
none of above <br>
|
| 27 |
Ketones are less reactive than aldehydes because:
|
alkyl groups electorn donation <br>
steric hindrance is greater in ketone <br>
both a and b <br>
ketones are non-polar <br>
|
| 28 |
When equal proportion of DH3_ l and C2H5 ___ l are treated with Na metal in preasence4 of dry ether, the number of possible hydrocarbons obtained will be:
|
5
4
3
2
|
| 29 |
The conversion of an halide of an alkene is an example:
|
addition reaction <br>
substitution reaction <br>
elimination reaction <br>
oxidation reaction<br>
|
| 30 |
The compound which does not form iodoform:
|
methyl alcohol <br>
ethyl alcohol <br>
acetone <br>
acetaldehyde<br>
|
| 31 |
Which of the following alkyl halides shows higher reactivity?
|
R __ F<br>
R __ CI <br>
R __ Br <br>
R __ I<br>
|
| 32 |
Which three element are needed for the health growth of plants:
|
S,S,P <br>
N,Ca,P
N,P,K <br>
N,K,C <br>
|
| 33 |
Natural fertilizers are materials derived form:
|
plants <br>
animals only <br>
both plant and animals <br>
none of all <br>
|
| 34 |
How many zones through which the charge passes in a rotary kiln?
|
4
3
2
5
|
| 35 |
The substance added to the soil to provide one or more nutrient elements which are necessary plant growth are known as:
|
Harmones <br>
minerals<br>
fertilizers <br>
none of above <br>
|
| 36 |
Which is not a calcareous material?
|
line <br>
clay <br>
marble <br>
marine shell <br>
|
| 37 |
At present the number or cement factories in Pakistan are:
|
20
22
25
30
|
| 38 |
Micro nutrients are required in quality ranging from:
|
4g - 40g<br>
6g - 200g<br>
6dg - 200kg <br>
4kg - 40kg <br>
|
| 39 |
The substances added in paints for improving the mechanical properties is called:
|
pigmein <br>
filter <br>
stabilizer <br>
binder <br>
|
| 40 |
The word paper is derived form the name of which reedy plant:
|
rose <br>
sun flower <br>
papyrus <br>
water hyacinth <br>
|
| 41 |
Which of the following are thermoplastic materials?
|
PVC (poly vinyl chloride)<br>
polystryences <br>
polyethylene <br>
all above <br>
|
| 42 |
Which woody raw material is used for the manufacture of paper pulp?
|
cotton <br>
bugases <br>
poplar <br>
rice straw <br>
|
| 43 |
Substances that tend to decrease the activity of enzymes are called:
|
coenzymes <br>
activators <br>
inhibitors <br>
apoenzyme <br>
|
| 44 |
How many fertilizer plants are now in Pakistan?
|
20
14
12
10
|
| 45 |
Which one is nitrogen fertilizer among the following:
|
calcium sulphate <br>
urea <br>
magnesium carbonate <br>
potassium phosphate <br>
|
| 46 |
Choose the crop for which ammonium nitrate is not used:
|
paddy rise <br>
cotton <br>
wheat <br>
sugar cane <br>
|
| 47 |
Select the name of ready plant from which word ''Paper'' is derived:
|
sun flower <br>
papyrus <br>
water hyacinth <br>
rose <br>
|
| 48 |
Silk is the example of:
|
mineral fiber <br>
vegetable fiber <br>
animal fiber <br>
none of above <br>
|
| 49 |
What element is not essential for the growth of plants and not required in the fertilizers?
|
nitrogen <br>
potassium <br>
phosphorus <br>
barium <br>
|
| 50 |
In FWFP the phosphate fertilizers are produced at:
|
D.I. Khan <br>
Haripur <br>
Nowshera <br>
Dargai <br>
|
| 51 |
Which of these the most widely used nitrogen fertilizer in Pakistan?
|
urea <br>
ammonium nitrate <br>
ammonium sulphate <br>
ammonium chloride <br>
|
| 52 |
Ammonia gas used directly as a fertilizer injected into the soil at a depth of about:
|
two inches <br>
three inches <br>
five inches <br>
six inches <br>
|
| 53 |
Surfactants are organic compounds used in detergents which reduce the:
|
viscosity of water <br>
surface tension of water <br>
boiling points of water <br>
surface ability of water<br>
|
| 54 |
The %age composition of the auxiliary agent in a detergent is:
|
10%
30%
50%
70%
|
| 55 |
Detergents are:
|
synthetic products <br>
natural product <br>
both a and b <br>
none of the above <br>
|
| 56 |
The %age of nitrogen in urea is:
|
46
60
70
80
|
| 57 |
The substance used in the soil to provide element.Which are essential for plant growth are known as:
|
manures <br>
fertilizers <br>
pesticides <br>
additive <br>
|
| 58 |
The elements like calcium nitrogen and phosphorus added into the soil in large amounts are called:
|
basic elements <br>
trace elements <br>
additives <br>
nutrient element <br>
|
| 59 |
Which is the chemical formula of calcium super phosphate:
|
CaH<sub>2</sub>PO<sub>4</sub>
CaHPO<sub>4</sub>
Ca(H<sub>2</sub>PO<sub>4</sub>)<sub>2</sub>
none of above <br>
|
| 60 |
Silk is an example of:
|
animal fiber <br>
vegetable fiber <br>
mineral fiber <br>
none of all <br>
|
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