agriculture MCQs – Page 43

Practise multiple-choice questions from agriculture for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

2101. The storage life of grape fruit at 50F with R.H of 90% is _____________________?
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A. 4-8 weeks

B. 2-3 weeks

C. 4-6 weeks

D. 10 weeks

2102. Elements essentially required for growth of all plants species are___________________?
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A. 16

B. 32

C. 3

D. 15

2103. Which one of the following is best flour improver ______________________?
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A. ClO2

B. All the above

C. Cl2

D. Benzoyl peroxide
2104. Addition of sodium hexametaphosphate in soil for determination of soil texture causes__________________?
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A. Agregation of soil particles

B. Cementing of soil particles

C. All the above

D. Dispersion of soil particles
2105. To prevent the growth of molds in bread ind other backed food which preservative is used___________________?
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A. Sodium acetate

B. Calcium acetate

C. All the above

D. Potassium acetate

2106. The problem of soil crosion Thal and Cholistan is predominantly due to___________________?
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A. All the above

B. Wind

C. Water

D. Air

2107. Many reactions similar to oxidative rancidity during irradiation been observed in _____________________?
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A. non of these

B. Lipids

C. Water

D. Carbohydrates

2108. pF unit is used for the measurement of_____________________?
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A. Negative soil water potential

B. Hydraulic potential

C. All the above

D. Hydraulic conductivity

2109. The mechanism of food intake regulation is known as ____________________?
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A. Lipostatic regulation

B. Glucostatic regulation

C. All the above

D. Aminostatic regulation

2110. The moisture content below which a cohesive soil does stick to metal tools is known as______________________?
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A. Alter berg limit

B. Sticky limit

C. Liquid limit

D. Plastic limit

2111. Weathering of gabbros gives_____________________?
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A. Clay and iron oxide

B. Sand and clay

C. Clay and Mg oxides

D. Sand and iron oxide

2112. Which rock contain potash feldspar ?
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A. Syeruite

B. Gabbro

C. All the above

D. Norile

2113. In soft drinks and dietetic forms of food which sweetening agent is widely used _____________________?
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A. All the above

B. Cyclamates

C. Calcium salt

D. Glycyrrhizin acid

2114. In preparation of fruit juices, pickles and carbonated beverages the preservative used is _____________________?
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A. Proconic acid

B. Benzonic acid

C. Parabens

D. All the above

2115. The plant trigly cerides are rich in_________________?
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A. Unsaturated fatty acids

B. Saturated fatty acids

C. Steroids

D. None of the above

2116. In dairy industry, the most often used bacteria to convert milk sugar to lactic acid are___________________?
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A. Streptococcus

B. Lactobacillus

C. Acetobacter

D. Both a & b
2117. Equation of Ozone is________________________?
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A. O2 O

B. O2 + O =O3

C. O3 + O

D. None of the above

2118. The symbol of Na stands for___________________?
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A. Nickle

B. None of these

C. Neon

D. Natrium

2119. Slipperiness is due to__________________?
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A. None of the above

B. Covalent bond

C. Wire bond

D. Vander walls forces
2120. Mechanisms of material uptake by plants is by____________________?
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A. Mass flow

B. Osmosis

C. Diffusion

D. Root interception

2121. Father of agricultural chemistry is___________________?
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A. J. jones

B. Neuron

C. Vonliebig

D. Neil Brady

2122. Mean annual precipitation for tundra region is ____________________?
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A. None of the above

B. 70-80 cm

C. 0-50 cm

D. 150-70 cm

2123. The inner shell of earth consists of_____________________?
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A. Silicate of Fe & Mg

B. Mg

C. Fe

D. Silicate

2124. The available form of calcium to plant is________________?
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A. Ca(free cation

B. CaO

C. None of the above

D. Ca

2125. The term applied to a material which tends to absorb moisture from the atmosphere is called__________________?
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A. Capillary

B. Hydroscopic

C. Available

D. Gravitational

2126. Total salt affected soils of Pakistan are____________________?
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A. 10.5 m ha

B. 6.3 m ha

C. 5.0 m ha

D. 12.3 m ha

2127. Silt stones consists of grains whose size range from____________________?
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A. 0.625 mm

B. 0.004 mm

C. 0.0625 mm

D. Both b & c
2128. Approximately caloric value in Kcal/100 g ofwalnut is__________________?
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A. 700

B. 600

C. 650

D. 500

2129. Who characterized soil formation as set of 4 process______________________?
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A. Newton

B. Jinney

C. Ziking

D. Simonson
2130. The deficiency of an enzyme is greatly influenced by the______________________?
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A. Concentration of enzyme

B. pH

C. All the above

D. Environmental temperature

2131. Which one of the following plays the role of a natural oxidants____________________?
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A. Vitamin E

B. Vitamin C

C. Vitamin A

D. None of the above

2132. For preservation of fruit dehydration is carried out by_____________________?
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A. Puff drying

B. Vacuum drier

C. all the above

D. Tunnel drier

2133. An ion or molecule in the coordination sphere central ion is called__________________?
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A. Potential

B. Ligand

C. Complexion

D. Chelate

2134. The storage life of mangoes at 50F with R.H of 90% is__________________?
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A. 1-2 weeks

B. 4-6 weeks

C. 2-4 weeks

D. 2-3 weeks

2135. Pure water has an water activity (Aw) of___________________?
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A. 1.00

B. 0.99

C. non of these

D. 1.5

2136. To make light cakes, biscuits and muffins which leavening agent is used___________________?
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A. All the above

B. Phosphate salts

C. Magnesium carbonate

D. Silicoaluminate

2137. Large pieces of erupted magma are called_____________________?
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A. Sill

B. Dike

C. Volcanic block

D. Volcanic ash

2138. Color off basic matic rock is_____________________?
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A. Light green

B. Dark colored

C. Blue

D. Yellow

2139. Cytochrome Oxidase and alcohol de hydrogenise are the examples of____________________?
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A. Lysases

B. Oxidoreductases enzymes

C. Transferases

D. Hydrolases

2140. Microorganisms have C/N ratio of____________________?
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A. 20:01

B. 4:1

C. 2:01

D. 12:01

2141. Tyndallization is more reliable than_____________________?
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A. non of these

B. Sterilization

C. Blanching

D. Pasteurization

2142. Which one of the following is the non-ethylene producing fruit______________________?
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A. Orange

B. Banana

C. Pear

D. Mango

2143. Bacteria producing toxins that cause food poisoning are known as___________________?
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A. Clostridium

B. Staphylococcus

C. Mycodesmavin

D. Both a & b
2144. Ant caking agents used in food industry are ________________________?
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A. Calcium silicate

B. All the above

C. Propylene glycol

D. Glycerol

2145. Which soil is suitable for nce________________?
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A. Fine textured

B. Sandy

C. Coarse textured

D. None of the above

2146. The storage life of Cabbage at 32F with R.H of 95% is____________________?
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A. 5-6 months

B. 3-5 months

C. 2-5 months

D. 3-4 months
2147. Which is passive factor of weathering ?
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A. Organisms

B. Climate

C. Temperature

D. Parent material
2148. Vertical movement of water was studied by_________________?
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A. Darcy

B. Kohler

C. Ziebig

D. Niel

2149. How many different minerals deposits are found in Pakistan ?
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A. None of the above

B. 60

C. 30

D. 100

2150. The salinity can be reduced by the application of___________________?
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A. All the above

B. Urea

C. Sulphuric acid

D. Lime