Q.12
ICAR AIEEA PG Physical Science 14 July 2023 Shift-1 Paper (Q.32)
Assertion & Reason
English हिन्दी

Given below are two statements, one is labeled as

Assertion (A) : and the other one is labeled as Reason (R):
Assertion (A) : The notation of Munsell Colour Chart is $2.5\text{YR } 5/6$.
Reason (R) : Hue is $2.5\text{ YR}$, value is $5$, and chroma is $6$.

In light of the above statements, choose the correct answer from the options given below:

नीचे दो कथन दिए गए हैं, एक को अभिकथन (A) और दूसरे को कारण के रूप में लेबल किया गया है:

अभिकथन (A) : मुनसेल कलर चार्ट का संकेतन $2.5\text{YR } 5/6$ है।
कारण : ह्यू $2.5\text{ YR}$ है, वैल्यू $5$ है और क्रोमा $6$ है।

उपरोक्त कथनों के आलोक में, नीचे दिए गए विकल्पों में से सही उत्तर चुनिए:

EXPLANATION Soil Profile Morphology, Diagnostic Horizons, Pedogenic Regimes and Soil Survey

Munsell color system notation:

  • Soil color is standardized using the Munsell system expressed as $\text{Hue } \text{Value}/\text{Chroma}$ (e.g., $2.5\text{YR } 5/6$): Assertion (A) is true.
  • The three constituent variables represent:
  • Hue: The dominant spectral wavelength / color family ($2.5\text{ YR} = \text{Yellow-Red}$).
  • Value: Relative lightness or darkness on a scale of $0$ (black) to $10$ (white); here Value $= 5$.
  • Chroma: Relative purity or saturation of color on a scale from $0$ (neutral grey) upwards; here Chroma $= 6$.
    Reason (R) precisely defines the constituent variables of the notation in (A). Therefore, both are true and (R) is the correct explanation of (A).

मुनसेल मृदा रंग प्रणाली (Munsell Color System):

  • अभिकथन (A) सही है: मुनसेल चार्ट में मृदा रंग को $\text{Hue } \text{Value}/\text{Chroma}$ (जैसे $2.5\text{YR } 5/6$) के रूप में लिखा जाता है।
  • कारण (R) सही है: इसमें $2.5\text{ YR}$ 'ह्यू' (स्पेक्ट्रल रंग), $5$ 'वैल्यू' (हल्कापन या गहरापन) और $6$ 'क्रोमा' (रंग की शुद्धता/तीव्रता) को दर्शाता है।
अतः (A) और (R) दोनों सही हैं और (R), (A) की सही व्याख्या है।
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