Surfactants act as a). Wetting agent b). Spreading agent c). Penetrants d). All

Surfactants act as
a). Wetting agent
b). Spreading agent
c). Penetrants
d). All
by

1 Answer

Answer :

d). All
by

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The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the (A) Differential heat of adsorption (B) Heat of wetting (C) Integral heat of adsorption (D) None of these

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Consider the following statements: 1. Dry rot in sap wood is caused by fungal attack 2. Brown rot in coniferous woods is a result of fungal attack 3. Alternate wetting and drying of unseasoned timber causes ‘powdery’ form of decay in wood. Which of these statements are correct? (a) 1, 2 and 3 b)1 and 2 only c)2 and 3 only d)1 and 3 only

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The process of consolidating concrete mix after placing it in position is termed as. (a) Curing (b) Wetting (c) Compaction (d) All of these

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In a 100 quadrat study of 1 sqm each Cyperus rotundus was found in 80 quadrats with overall of 5640 individuals. The frequency (%), abun dance and density (m2) would be a). 70.5, 80.0 and 56.4 b). 56.4, 70.5 and 80.0 c). 80.0, 70.5 and 56.4 d). 80.0, 56.4 and 70.5

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If Echinochloa falls in frequency class ‘E’, the weed community is said to be a). Contiguous b). Heterogenous c). Homogenous d). Random

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Out of 50 quadrats studied, if Echinochloa is found in 26 quadrats, its frequency of occurrence would be a). 13% b). 26% c). 52% d). 68%

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If the count of Echinochloa in weedy check is 70 and that in a treatment 25/m2, weed control efficiency will be a). 54.3% b). 64.3% c). 73.4% d). 79.6%

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If the yield from weed free is 3500 kg and that from weedy 1500 kg/ha, weed index would be a). 57.1% b). 133.3% c). 45.0% d). 25.6%

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Last Answer : b). 2.0

The cost of any activity measured in terms of the value of the next best alternative forgone a). Economic cost b). Variable cost c). Opportunity cost d). Marginal cost

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Last Answer : c). Opportunity cost

A cost independent of the quantity of goods and services produceda). Variable cost b). Fixed cost c). Opportunity cost d). Marginal cos

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The additional cost from taking a cost of action is called a). Total cost b). Opportunity cost c). Variable cost d). Marginal cost

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