Which of the following statement is correct ? | Agrigyan

6

RPSC ARO 10 Feb 2016

MCQ (Single Correct) +1 −0.33

The movement of insecticide towards the surface of the soil alongwith water is called :-

पानी के साथ मिट्टी की सतह की ओर कीटनाशक की गति को क्या कहा जाता है :-

Surface residue सतही अवशेष Disorption phenomenon विशोषण परिघटना Penetrated residue अंतर्प्रवेशी अवशेष Wick - effect बाती प्रभाव

The wick effect designates the upward capillary migration of water carrying dissolved or desorbed pesticide molecules from subsoil layers toward the evaporating soil surface.
Surface residue denotes pesticide deposits remaining on the outermost plant or soil crust, without denoting directional hydrodynamic transport.
Desorption is the physicochemical release of bound chemical molecules from soil organic matter or clay mineral surfaces into the pore water.
Penetrated residue represents pesticide fractions that have absorbed into plant tissues or leached downward into deeper soil strata.

Hence, the correct answer is Wick - effect (Option 4).

मिट्टी से पानी के वाष्पीकरण के दौरान केशिका क्रिया द्वारा घुले हुए कीटनाशक का नीचे से ऊपर मिट्टी की सतह की ओर आना 'बाती प्रभाव' (Wick effect) कहलाता है।
सतही अवशेष केवल सतह पर मौजूद कीटनाशक की मात्रा को दर्शाता है।
विशोषण मिट्टी के कणों से जुड़े कीटनाशक अणुओं के अलग होने की प्रक्रिया है।
अंतर्प्रवेशी अवशेष वह भाग है जो मिट्टी की गहराई में या पादप ऊतकों में प्रवेश कर चुका हो।

अतः सही उत्तर बाती प्रभाव है (विकल्प 4)।

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

7

RPSC ARO 10 Feb 2016

MCQ (Single Correct) +1 −0.33

Which of the following statement is correct ?

निम्नलिखित में से कौन सा कथन सही है?

Mutagenic agent : It has been established that insecticides are invariably mutagenic agents उत्परिवर्तजन कारक: यह स्थापित हो चुका है कि कीटनाशक अनिवार्य रूप से उत्परिवर्तजन होते हैं Half life : The rate of disappearance of insecticide deposited अर्ध-आयुकाल: जमा किए गए कीटनाशक के लुप्त होने की दर Deposit : The amount of initially laid down insecticidal chemical on the target surface निक्षेप: लक्षित सतह पर प्रारंभिक रूप से जमी हुई कीटनाशक रसायन की मात्रा Residue : The amount of insecticide sprayed on the plant अवशेष: पौधे पर छिड़के गए कीटनाशक की मात्रा

In pesticide residue terminology, Deposit is strictly defined as the mass of active pesticide chemical initially deposited per unit area on the target surface immediately after application.
Not all insecticides are mutagenic agents; mutagenic potential varies widely across individual chemical structures and must be empirically demonstrated in genetic toxicology assays.
Half-life is defined as the time required for half the original chemical deposit to degrade or dissipate, not the instantaneous rate of disappearance.
Residue represents the remaining quantity of the parent insecticide and its toxic degradation metabolites over time, whereas the amount sprayed is the applied dosage.

Hence, the correct answer is Deposit : The amount of initially laid down insecticidal chemical on the target surface (Option 3).

निक्षेप (Deposit) का सही तकनीकी अर्थ है: छिड़काव के तुरंत बाद लक्षित सतह पर जमी हुई कीटनाशक रसायन की प्रारंभिक मात्रा।
सभी कीटनाशक उत्परिवर्तजन नहीं होते हैं, यह प्रत्येक रसायन की विशिष्ट संरचना पर निर्भर करता है।
अर्ध-आयुकाल वह समय है जिसमें कीटनाशक की प्रारंभिक मात्रा घटकर आधी रह जाती है, न कि केवल गायब होने की दर।
अवशेष वह मात्रा है जो समय बीतने के बाद पौधे या उत्पाद में बची रह जाती है।

अतः सही उत्तर विकल्प 3 है।

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

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