1 - Which of the following is a macronutrient?
carbon
2 - Requirement of macronutrient per acre of the land is
5 to 200 kg
3 - Three elements needed for the healthy growth of plants are
N P K
4 - Which of the following is not a secondary pollutant
carbon dioxide
5 - Residence time of methane in the atmosphere is
3 - 7 years
6 - Major cause of SO2 on global scale is
volcanoes
7 - Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing
all of the above
8 - Acid present in acid rain may be
both a and b
9 - The yellow colour in photochemical smog is due to presence of
nitrogen dioxide
10 - Which of the following is not a condition for the formation of smog?
winds
11 - Incineration of muncipal waste is carried out in the temperature range of
900 to 1000Degree Centigrade
12 - In which of the following layer of atmosphere there is more thickness of ozone layer?
stratosphere
13 - Which of the following is not primary pollutant
H2SO4
14 - Which of the following air pollutants is more dangerous for ozone layer?
CFC
15 - Which of the following gases is the main cause of acid rain?
NO2
16 - Which statement is wrong?
the amount of ozone layer is greater in the region close to the equator
17 - Which of the following factors help to measure quallity of water?
all of the above
18 - In the purification of portable water the coagulant used is
alum
19 - Newspaper can be recycled again and again how many times?
5
20 - The main pollutant of leather tanneries in the waste water is
chromium IV
21 - A single chlorine free radical can destroy how many ozone molecules?
100000
22 - Which substance can be used for disinfecting water?
KMnO4
23 - Chlorination of water may be harmful if the water contains
Ammonia
24 - Which one of the following makes the bulk of hydrospheres content?
oceans
25 - Which of the following is used as water disinfectant to avoid the formation of toxic compounds
both b & c
26 - The percentage of suspended solid waste in raw water is removed by coagulation is
80
27 - Ozone hole is substantial depletion of ozone in every year during
Sep - Nov
28 - The main product of bacterial action is
NO
29 - Pollutants have adverse effect over
Ecosystem
30 - All the following variables are used to describle gases except
density
31 - Which of the following is incorrect statement about nitrogen importance?
it accelerates fruits and flowers growth
32 - The fertilizers which provide single nutrient from NPK are called ______ fertilizer.
straight
33 - Which of the following is macronutrient?
H
34 - Addition of urea to the soil is _________ reaction.
exothermic
35 - Which of the following is the most suitable catalyst for ammonia synthesis?
Fe in fused mixture of Al2O3 + SiQ2 + MgO
36 - The cooling of molten urea by air in the tower is called
prilling
37 - Which of the following fertilizers is not useful for paddy rice?
Ammonium nitrate
38 - DAP (Diammonium hydrogen phosphate) contains _________ plant nutrients.
0.75
39 - Which of the following potassium fertilizers are more useful for horticultural crops tobacco & potatoes?
KNO3
40 - Calcarious material includes
all of the above
41 - Argillaceous material does not include
marine shells
42 - Which of the following processes is used for the synthesis of cement?
both
43 - Phosphorus helps in the growth of
seed
44 - How many zones through which the charge passes in a rotary kiln?
4
45 - The nutrients which are required in very small amount for the normal growth of plants are called
micronutrients
46 - Which one of the following set of raw material is most suitable for manufacture of urea?
CH4 N2 and CO2
47 - Which one of the following statement is correct for urea?
it is a synthetic fertilizer
48 - The percentage of nitrogen in urea is
0.46
49 - Which one of the following is an inorganic fertilizer?
ammonium nitrate
50 - Which one of the following fertilizers provides the nitrogen and phosphorus to the plant?
diammonium phosphate
51 - The potassium present in plant help the plant to
all the above statements are correct
52 - Cement is a mixture of
clay lime stone and gypsum
53 - What is clinker?
roasted calcareous and argillaceous material
54 - Cement is a mixture of so many compounds roasted in rotary kiln. Which substances has greater percentage?
Lime (CaO)
55 - Which one of the following raw material is not present in the cement?
iron oxide
56 - Which sequence of steps is correct for the manufacture of cement?
crushing grinding mixing heating
57 - The sequence of zones in the rotary kiln are as
dry zone decomposition zone burning zone cooling zone
58 - The composition of mixture of clay and lime stone in the raw for cement material is
75% lime stone and 25% clay
59 - The important function of burning zone in the rotary kilm is
combination of different oxides like CaO SiO2 Fe2O3 and Al2O3
60 - Which of the following is not a heavy industry?
none
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