2. Theory
Chapter Name of Chapter Weitage
(100)
I Introduction 02
II Manures 30
(A) Bulky Organic manures ( 20)
(B) Concentrated organic manures ( 10 )
III Fertilizers 40
(A) Nitrogenous Fertilizers (16)
(B) Phosphatic Fertilizers (10)
(C) Potassic Fertilizers (05)
(D) Secondary and Micronutrients (05)
(E) Fertilizer mixture (02)
(F) Complex fertilizers (02)
IV Bio fertilizers & Fertilizer Control acts 12
V Agro chemicals 16
Total 100
3. MCQ
Chapter-1 Introduction
1 _______ is the third largest producer of fertilizers in the world.
(a) India (b) China (c) U.S.A. (d) Brazil
2 Total ______nutrients are essential for growth and development of plant.
(a) 20 (b) 16 (c) 14 (d) 26
3 India’s average nutrient consumption is_______ Kg / hectare.
(a) 112 (b) 101 (c) 212 (d) 202
4 _______ is the first largest producer and consumer of fertilizer in the world.
(a) France (b) America (c) China (d) Canada
Chapter-II Manures (A) Bulky Organic manures
1. FYM, compost and Green manure are_______ organic manure.
(a) bulky (b) concentrated (c) fortified (d) chemical
2. When raw sewage is treated to remove solid portion, the water technically
known as ________.
(a) Manure (b) Activated sludge (c) treated effluent (d) night soil
3 On an average well rotted FYM contains____ % N.
(a) 0.5 (b) 1 (c) 1.5 (d) 2.5
4 _____ is the best example of in situ green manuring.
(a) Gliricidia (b) Karanj (c) Sasbenia (d) Sannhemp
5 ______ Gas is generated during fermentation process in gobar gas plant.
(a) Methane (b) Ethane (c) CNG (d) LPG
6 The smell of ______ in cattle shed clearly indicates the loss of nitrogen.
(a) N2 (b) NH3 (c) N2O (d) SO2
7 Vermicompost is excreta of ______.
(a) Cattles (b) Earthworm (c) Nematode (d) Birds
8 The most suitable green manure crop for problematic soil is _____.
(a) Dhaincha (b) Sannhemp (c) Guar (d) Cowpea
9 Soil fertility and soil productivity can be improved by _______.
(a) DAP (b) Urea (c) Manures (d) SSP
10 Town compost contains _______ percent nitrogen.
(a) 1.4 (b) 1.0 (c) 2.5 (d) 2.4
11 Loss of organic matter in pit decomposition is ___ %
(a) 75 (b) 50 (c) 25 (d) 10
12 The green manuring crop is turned in to soil at _______ stage.
(a) Harvesting (b) Flowering (c) early (d) Germination
13 Poudrette is prepared from _______.
(a) FYM (b) Compost (c) Night soil (d) green manure
14 Night soil contains__________ percent phosphorus.
(a) 5.5 (b) 4.0 (c) 2.o (d) 3.0
15 The loss of _____ from Urine and dung increases with the increase in the
concentration of ammonium carbonate.
(a) NH4
+
(b) NH2 (c)NH3 (d) N2O
16 Old animal’s excreta contain ________ plant nutrients in comparison to
young animals.
4. (a) Equal (b) Less (c) More (d) Zero
17 Urine of all animals contains more percentage of _______ as compared to
the dung portion.
a) N & K2O (b) S & P2O5 (c) K2O & P2O5 (d) P2O5 & N
18 _____ contains all plant nutrients but in small quantity.
(a) compost (b) Urea (c) DAP (d) CAN
19 Poultry manure is the _____ in nutrient content among bulky manures.
(a) poorest (b) medium (c) richest (d) poor
20 The optimum moisture requirement to start the decomposition process is __
(a) 10 – 20 % (b) 60 – 70 % (c) 30 – 40 % (d) 80 – 90 %
21 The solid portion of sewage is known as _______.
(a) Compost (b) Effluent (c) Sludge (d) Night soil
22 The manure obtained from the gobar gas plant after decomposition contains
_____ % N.
(a) 2.5 (b) 1.5 (c) 3.5 (d) 4.5
23 What is percentage of water soluble potash in FYM?
(a) 90 (b) 60 (c) 80 (d) 70
24 Which pH range is the most suitable for decomposition of FYM?
(a) 5.0- 5.5 (b) 8.0-8.5 (c) 7.0-7.5 (d) 9.0-10.0
25 Night soil contains__________ percent nitrogen.
(a) 5.5 (b) 4.0 (c) 2.o (d) 3.0
26 The manure obtained from the gobar gas plant after decomposition contains
_____ % K2O.
(a) 0.5 (b) 1.5 (c) 2.0 (d) 3.5
27 Activated sludge contains__________ percent P2O5.
(a) 4.0 (b) 3.0 (c) 1.o (d) 2.0
28 ______ is the most outstanding green manure crop.
(a) Dhaincha (b) Sannhemp (c) Berseem (d) Cowpea
(B)Concentrated organic manures
1 Neem cake contains _______ alkaloid.
(a) Ricin (b) Saponine (c) Nimbidine (d) Lucin
2 ______ Cake has the highest nitrification rate.
(a) Groundnut (b) Castor (c) Mahuva (d) Neem
3 Organic manure binds soil particles into structural units called_________.
(a) Particles (b) aggregates (c) sand (d) silt
4 ______ is concentrated organic manures.
(a) FYM (b) Night soil (c) Mustard cakes (d) Vermicompost
5 Mahuva cake contains ____ which are responsible for slow nitrification rate.
(a) ricin (b) Nimbidin (c) saponin (d) lycopene
6 The blood is collected from slaughter house and treated with _____ for
preparation blood meal.
(a) K2SO4 (b CuSO4 (c) FeSo4 (d) ZnSO4
7 Poultry manure is the _____ in nutrient content among bulky manures.
(a) poorest (b) medium (c) richest (d) poor
5. 8 Fish manure is rich in ______ as compared to all concentrated organic
manures.
(a) Nitrogen (b) Potash (c) Phosphorous (d) zinc
9 Generally _______oil cake is used as manure.
(a) Castor (b) Groundnut (c) Cotton seed (d) Sesame
10 Fresh organic matter has a special function in making soil phosphorus more
readily available in __________ soils.
(a) Neutral (b) Acid (c) Alkaline (d) Sandy
11 The resistance against rapid chemical changes in pH is known as _________
(a) Acidity (b) Alkalinity (c) Buffering (d) Salinity
12 The C: N ratio in the organic manures remaining in the soil after consuming
by the microorganisms is approximately_________.
(a) 20:1 (b) 30:1 (c) 40:1 (d) 10:1
13 Castor cake contains ________, which are responsible for slow nitrification.
(a) Ricin (b) Saponin (c) Nimbidine (d) Methionine
14 _________ cake has good vermicidal effect against white ants.
(a) Groundnut (b) Castor (c) Cotton seed (d) Coconut
15
Chapter – III Fertlizers (A)Nitrogenous
1 The conversion of ammonical form in to nitrate form by bacteria is known
as ______.
(a) Denitrification (b) Nitrification (c) ammonification (d) Minaralisation
2 _______ is the chief compound for the manufacturing of nitrogenous
fertilizers.
(a) NO2 (b) NO3 (c) NH3 (d) KCL
3 In urea biuret content should not be more than ________. %
(a) 1.0 (b) 1.5 (c) 2.0 (d) 2.5
4 _______ is an organic fertilizer.
(a) DAP (b) Urea (c) SSP (d) MOP
5 When ammonium sulphate is applied to calcareous soil, losses of nitrogen
occur due to ________.
(a) leaching (b) volatilization (c) spreading (d) frothing
6 The formula of urea is ________.
(a) NHCONH (b) NH2CONH2 (c) (NH)2 (d) HNCHN
7 The organic form of N converted into inorganic form of N by
microorganisms is known as ______.
(a) immobilization (b) nitrification (c) mineralization (d) aminification
8 All ammonical fertilizers are _______ in their residual effect on soil.
(a) acidic (b) netural (c) basic (d) poisonous
9 ________ fertilizer is physiologically neutral.
6. (a) CAN (b) DAP (c) MOP (d) Urea
10 Conversion of NO3
–
N to NH4
–
N is known as _______.
(a) ammonification (b) Denitrification (c) Nitrification (d) aminification
11 The________ from of nitrogen is most susceptible to leaching.
(a) NH4 (b) NH2 (c) NO3 (d) NH3
12 At early stage of Paddy crop prefers nitrogen in the from of ________.
(a) N2 (b) NO3 (c) NH4 (d) NO2
13 Anhydrous ammonia contain__________% nitrogen.
a) 20 (b) 28 (c) 46 (d) 82
14 Sodium nitrate is _______ fertilizer.
(a) Acidic (b) Basic (c) Neutral (d) Toxic
15 Any material dry or liquid added to the soil in order to supply one or more
plant nutrient is known as________.
(a) Fertilizer (b)Filler (c) amendment (d) conditioner
16 Ammonium sulphate contain _______ % N.
(a) 20 (b) 18 (c) 24 (d) 28
17 _______ is act as slow release nitrogenous compounds...
(a) N-Serve (b) AM (c) Oxamide (d) Thiourea
18 _______ decrease the activity of nitrifying bacteria and slow rate of
nitrification.
(a) Urea (b) Calcium nitrate (c) Oxamide (d) Thiourea
19 ________ Fertilizers are superior to the other form of nitrogenous fertilizer
for dry land agriculture.
(a) Amide (b) Ammonical & Nitrate (c) Nitrate (d)Ammonical
20 The amount of lime lost is maximum when______ fertilizer is added in soil.
(a) Urea (b) NH4Cl (c) NaNO3 (d) KNO3
21 The equivalent acidity produced by ammonium Sulphate fertilizer is ____.
(a) 60 (b) 100 (c) 110 (d) 80
22 Plant absorbed nitrogen as________ form.
(a) NO3 (b) N2O (c) NO2 (d) N2
23 Nitrates largely accumulates in soil having pH
(a) 6.0 (b) 7.0 (c) 5.0 (d) 8.0
24 Which fertilizer is highly Hygroscopic?
(a) Urea (b) Sodium nitrate (c) Ammonium sulphate (d) CAN
25 Which is formed in aminization?
(a) NO3
-
(b) NH4
+
(c) NO2
-
(d) R-NH2
26 By denitrification, which gas largely escapes to the atmosphere?
(a) NO (b) N2O (c) NO2
-
(d) N2
27 Ammonium Sulphate contain________% sulphur.
(a) 16 (b) 24 (c) 12 (d) 8
28 Which is the amide fertilizer?
a) CAN (b) Sodium nitrate (c) Ammonium sulphate (d) Urea
29
30
7. (B) Phosphatic Fertilizers
1 Single super phosphate is produced by the reaction of rock phosphate with
_________.
(a) HNO3 (b) H2SO4 (c) HCl (d) H3PO4
2 _________ is citrate and water insoluble P containing fertilizer.
(a) DAP (b) SSP (c) Rock Phosphate (d) Basic slag
3 Diammonium phosphate contain _____ % P2O5
(a) 46 (b) 24 (c) 18 (d) 20
4 The conversion of factor of P to P2O5 is ________.
(a) 1.29 (b) 2.29 (c) 3.29 (d) 1.19
5 The requirement of P is maximum at ________ stages
(a) Initial (b) Harvest (c) Grand growth (d) Flowering
6 The P nutrient of all the phosphatic fertilizer is expressed as _________.
(a) PO4 (b) P2O5 (c) HPO4 (d) H2PO4
7 In manufacturing of triple super phosphate ________ acid is used instead of
sulphuric acid with calcium phosphate.
(a) HCl (b) H3PO4 (c) HNO3 (d) HClO4
8 When one H+
ion of H3PO4 reacts with NH3 ________ Fertilizer is formed.
(a) MAP (b) SSP (c) DSP (d) DAP
9 Plant absorbed P in ________ formed.
(a) H2PO4 (b) HPO3 (c) PO3 (d) P2O5
10 The _______ is used for long duration crops in large quantity.
(a) DAP (b) Urea (c) SSP (d) Raw bone meal
11 The water soluble P is changed in to insoluble form of calcium phosphate
under _________ condition.
(a) acidic (b) calcareous (c) neutral (d) sodic
12 The water soluble P is changed in to insoluble form of Fe and Al – PO4
(phosphate) under _________ condition.
(a) acidic (b) calcareous (c) neutral (d) sodic
13 When two H+
ions of H3PO4 reacts with NH3 ________ Fertilizer is formed.
(a) MAP (b) SSP (c) TSP (d) DAP
14 ________ is the water soluble P containing fertilizer.
(a) SSP (b) Basic slags (c) Rock phosphate (d) Raw bone meal
15 The citrate and water insoluble P fertilizers are suitable for _______ soils.
(a) Strongly acidic (b) Neutral (c) Calcareous (d) Sodic
16 The predominant ionic species of phosphate in soil at pH below 6.7 is
(a)H2PO4
-
(b) PO4
3-
(c) HPO4
2-
(d) H3PO4
17 ______mineral is widely used for the manufacturing of phosphatic fertilizer.
(a) Gypsum (b) Calcite (c) Rock phosphate (d) Feldspar
18 Single super phosphate contain _____ % P2O5
(a) 46 (b) 24 (c) 16 (d) 32
19
8. (C) Potassic Fertilizers
1 Potassium improves ________ quantity of tobacco.
(a) Burning (b) Chewing (c) Keeping (d) Colouring
2 The K nutrient in all the potash fertilizers is expressed as _______.
(a) K2O (b) KMnO4 (c) KCl (d) K2 Cr2 O7
3 Potassic fertilizer containing Cl –
ions are not suitable for _______.
(a) Sugarcane (b) Wheat (c) Potato (d) Groundnut
4 _________ improves the luster and gives more colouration of the fruits.
(a) N (b) K (c) P (d) Zn
5 The conversion factor of K to K2O is ________.
(a) 1.2 (b) 2.2 (c) 2.29 (d) 2.1
6 When K2O reacts with water, it forms _________.
(a) KNO3 (b) KOH (c) K2SO4 (d) K2O
7 The Sulphate of potash and magnesium is known as _________.
(a) schoenite (b) mica (c) bentonite (d) feldspar
8 Sulphate of potash contains ________ % K2O.
(a) 40 (b) 48 (c) 44 (d) 52
9 Muriate of potash contains ________ % K2O.
(a) 38 (b) 48 (c) 58 (d) 62
10 _________ is the potash bearing mineral.
(a) Rock phosphate (b) Mica (c) Gypsum (d) Hematite
11 ______ increases the winter hardiness and reduces the lodging of crops.
(a) K (b) N (c) P (d) Ca
12 The cheapest fertilizer is
(a) K2SO4 (b) K2HPO4 (c) KCl (d) K2SO4.MgSO4
13 _______ Silicate clay mineral is rich in potash.
(a) Illite (b) Kaolinite (c)Montmorillonite (d) Chlorite
14
(D) Secondary and Micronutrients
1 _________ micronutrient is required in very small quantity by plants as it is
present in seeds and soil.
(a) Copper (b) Zinc (c) Manganese (d) Molybdenum
2 _______ nutrient is present in soil as anion.
(a) Fe (b) B (c) Mn (d) Zn
3 Plant absorbed Sulphur as _______ form.
(a) SO2 (b) S2O (c) SO3 (d) SO4
4 _________ micronutrient is required for help in atmospheric nitrogen
fixation in legumes
(a) Copper (b) Zinc (c) Molybdenum (d) Iron
5 Boron is found to be deficient in ___________ soil as it is changed to
insoluble calcium borate.
(a) Calcareous (b) acid (c) Saline (d) Neutral
6 The critical limit of zinc is ________ ppm.
9. (a) < 5.0 (b) < 0.5 (c) > 1 (d) < 0.005
7 _______ is a compound in which metallic cation is bounded to an organic
molecule.
(a) Filler (b) Conditioners (c) Fertilizer (d) Chelates
8 The deficiency of micronutrients was observed in soil due to reduce the use
of __________.
(a) fertilizer (b) organic manures (c) mineral (d) filler
9 The critical limit of iron is _______ppm.
(a) < 5.0 (b) < 0.5 (c) > 5 (d) < 10
10 Of the following, which is an ultra micronutrient?
a) Iron (b) Zinc (c) Boron (d) Molybdenum
11 Which is the micronutrient fertilizer?
(a) CaSO4 (b) K2SO4 (c) ZnSO4 (d) MgSO4
12 Non-essential but useful nutrients for plants would include
(a) C and Na (b) Va and Na (c) Va and Cl (d) Va and Mo
13 Which is the essential nutrient element?
(a) Aluminium (b) Iodine (c) Barium (d) Copper
14 _____ acts as a regulator of potassium/ calcium ratio in the plant.
(a) B (b) S (c) N (d) Mg
15 _______helps in absorption of nitrogen.
(a) Mn (b) Mo (c) B (d)Zn
(E) Fertilizer mixture
1 The fertilizer containing three major plant nutrients is called _______
fertilizers
(a) complete (b) straight (c) incomplete (d) mix fertilizer
2 One of the following is added during mixing of fertilizers to avoid caking.
(a) Filler (b) Conditioners (c) Minerals (d) Chelate
3 ________ Fertilizers should be mixed shortly before use.
(a) insoluble (b) hygroscopic (c) citric acid soluble (d) incomplete fertilizer
4 ________ is a fertilizer mixed fertilizer
(a) Sufla (b) DAP (c) Nitrophosphate (d) SSP
5 When fertilizer contain single plant nutrient is called _________ fertilizer.
(a) complete (b) straight (c) mixed (d) high analysis
6 A _______ is making weight material added to a fertilizer mixture.
(a) Filler (b) Conditioners (c) Peat (d) chelates
7 _________ is used as soil conditioner.
(a) Sand (b) Ground coal (c) Ash (d) Dolomite
(F) Complex fertilizers
1 High analysis fertilizer contains more than _____ % plant nutrient
(a) 20 (b) 10 (c) 30 (d) 15
2 _________ is an example of complex fertilizer.
10. (a) Urea (b) DAP (c) SSP (d) MOP
3 Complex fertilizers contains only ______ primary nutrients, it designated as
incomplete complex fertilizers.
(a) 2 (b) 1 (c) 3 (d) 4
4 ________ requirement during the early root development and early plant
growth.
(a) Nitrogen (b) potash (c) Sulphur (d) Phosphorous
5 ________ fertilizer should be placed near the seeds or seeddlings.
(a) Nitrogenous (b) Potassic (c) Phosphatic (d) organic
5 Nitrogenous fertilizers should be applied in three splits to crops of _____
months duration.
(a) 9 to 12 (b) 4 to 5 (c) 6 to 7 (d) 2 to 4
6 ________fertilizers are suitable for top dressing and side dressing.
(a) Nitrogenous (b) Organic (c) Mixed (d) Phosphatic
7 Generally application of nitrogenous, phosphatic and potassic fertilizer are
considered as ________ fertilization.
(a) Unbalanced (b) Balanced (c) Incomplete (d) Compete
Chapter – V Bio fertilizers & Fertilizer control acts
1 The tempratue range for Azolla is _________°C
(a) 10 – 15 (b) 25 – 30 (c) 40 – 45 (d) 45 – 50
2 __________ Symbiotic organism fixes atmospheric nitrogen.
(a) Azatobactor (b) Nitrosomonas (c) Rhizobium (d) Blue green algae
3 Mycorthyza is known as ________.
(a) N fixer (b) P solublizer (c) P absorber (d) S solublizer
4 __________ is most important and well known free living nitrogen fixing
micro inoculant for wheat.
(a) Azatobactor (b) Rhizobium (c) Azolla (d) Blue green algae
5 ________fertilizers are eco friendly fertilizer.
(a) Nitrogenous (b) potassic (c) Phosphatic (d) Bio
6 _________ is any material added to a soil to improve its physical properties.
(a) Filler (b) Fertilizer (c) Soil amendment (d) chelates
7 GSFC is situated at __________ in Gujarat.
(a) Kalol (b) Vadodara (c) Bharuch (d) Surat
8 The first fertilizer factory in India was established at _________.
(a) Ranchi (b) Faizabad (c) Ranipet (d) Cochin
9 New fertilizer policy was introduced in ________.
(a) 1944 (b) 2003 (c) 1995 (d) 2000
10 In ______ the government of India established the “central fertilizer pool.”
(a) 1944 (b) 1970 (c) 1906 (d) 2003
11 The combined use of mineral fertilizers, organic manures and bio-fertilizers
is known as________.
(a) INM (b) IPM (c) IWM (d) IDM
12 _________ fertilizer factory is situated at Kalol.
11. (a) GNFC (b) GSFC (c) IFFCO (d) KRIBHCO
Chapter –VI Agro Chemicals
1 Pyrethrois is a natural insecticide made from the flowers of _____ plant
(a) chrysanthemum (b) neem (c) tobacco (d) tulsi
2 The discoverer of _________ was awarded the Noble Prize.
(a) DDT (b) nicotine (c) rotenone (d) EDTA
3 Auxin favours female flower production in _______ plant
(a) tomato (b) brinjal (c) cauliflower (d) cucumber
4 Botanical insecticides are highly toxic to ________ animals.
(a) warm – blooded (b) neutral – (c) cold – blooded (d) normal blooded
blooded
5 Fruit ripening is controlled principally by the production of _________.
(a) auxin (b) cytokinins (c) ethylene (d) gibbrelin
6 ________ Group of insecticide has law environmental persistence.
(a) Chlorinated (b) Carbamates (c) Organophosphates (d) Synthetic
hydrocarbons pyrethroids
10 _________ kills the mites.
(a) Predicides (b) Piscicides (c) Ovicides (d) Acaricides
11 ________ used as anti transpirant.
(a) Auxin (b) Abscisic acid (c) Gibbrelin (d) ethelyne
12 _________ is slow acting stomach poison.
(a) Rynia (b) Nicotine (c) pyrethrin (d) Rotenone
13 Pyrethroids are axonic poisons and cause __________ of an organism
(a) paralysis (b) diabetes (c) heart attack (d) cancer
14 _________common systemic herbicide.
(a) 2,4 – D (b) Lindane (c) DDT (d) Malathion
15 The substance used for controlling, destroying, repelling or mitigating any
pest is called_________.
(a)Fungicides (b) Pesticides (c) Bactericides (d) Weedicides
16 ______ has been effectively used to produce parthenocarpy in tomato.
(a) 2,4 – D (b) Cytokinins (c) GA (d) NAA
17 _________ kills the weeds
(a) Herbicides (b) Ovicides (c) Miticides (d) Fungicides
18 _____ is a broad- spectrum systemic herbicide used to kill perennials weeds.
(a) Atrazine (b) Glyphosate (c) Captan (d) 2,4-D
19 _________kills the predators.
(a) Predicides (b) Ovicides (c) Miticides (d) Fungicides
20 ________ is the used for destroy of eggs.
a) Algicides (b) Ovicides (c) Miticides (d) Ovicides
12. Ag.Chem.1.1 (Introduction to Soil Science)
Chapter 1: The Earth and Eatrth’s Crust
1 The gaseous envelope over the earth’s surface is the ________.
(a) Temperature (b) Atmosphere (c) Hydrosphere (d) Lithosphere
2 The outermost 10 mile strata of the lithosphere are called ________.
(a) Soil (b) Horizon (c) Earth crust (d) Soil profile
3 The two non-metallic elements occurring in greatest abundance in the earth crust are___.
(a) Ca & Mg (b) O2 & Si (c) Al & Fe (d) Na & K
4 _______hypothesis the most generally accepted regarding the origin of earth.
(a) Nebular (b) Munsell (c) Gravitational (d) Planetisimal
5 A branch of soil science which deals with the soil from the crop production
point of view:
(a) Pedology (b) Edaphology (c) Ecology (d) Soil geology
Chapter-2:Rocks and Minerals
1 Sedimentary rocks are also known as__________.
(a) Metamorphic rock (b) Stratified rock (c) Igneous rock (d) Intrusive rock
2 __________ rocks are formed by solidification of molten magma.
13. (a) Igneous (b) Sedimentary (c) Metamorphic (d) Quartzite
3 Sedimentary rocks are also known as__________.
(a) Metamorphic rock (b) Stratified rock (c) Igneous rock (d) Intrusive rock
4 The individual grains size in rudaceous sedimentary rock is of _________.
(a) Sand (b) Clay (c) boulders and pebbles (d) Silt
5 Science which deals with the description of rocks is _________.
(a) Petrography (b) Petro genesis (c) Chromatography (d) Pedology
6 Water plays an important role in the formation of________rocks.
(a) Igneous (b) Sedimentary (c) Metamorphic (d) Plutonic
7 Marble is metamorphic rock converted from lime stone due to the action of ______.
(a) Temperature (b) Pressure (c) Heat (d) Water
8 The clay fraction of the soil has diameter less than________mm.
(a) 0.002 (b) 0.2 (c) 0.02 (d) 2
9 Science which deals with the study of the origin of rocks is _________.
(a) Petrography (b) Petro genesis (c) Edaphology (d) Pedology
10 _______ minerals arises from cooling and solidification of a molten mass.
(a) Primary (b) Secondary (c) Clay (d) Gypsum
11 Slate is formed from_________ rock through the action of pressure.
(a) Sand stone (b) Lime stone (c) Shale (d) Basalt
12 ________ Igneous rock contains more than 65 percent SiO2.
(a) Basic (b) Acidic (c) Ultra basic (d) Intermediate
13 _______ clay formed from the decomposition of feldspar.
(a) China (b) Pipe (c) Fire (d) Reddish clay
14 The minerals having specific gravity < 2.85 g/cc are called _______minerals.
(a) Neutral (b) Light (c) Heavy (d) Clay
