Point out the mobile nutrients in soil: (A) Cu²⁺, NO₃⁻, Fe²⁺...

All Subjects General Agriculture, Crop Production, Physiology & Rural Development Analytical, Physical & Organic Chemistry and Pesticides Pedology, Soil Physics, Soil Colloids, Problem Soils & Water Quality Soil Fertility, Classification, Remote Sensing, Soil Biology, Fertilizers & Pollution

ICAR AIEEA PG Physical Science 09 July 2023 (Shift 1) Paper

MCQ (Single Correct)

Point out the mobile nutrients in soil:

(A) $\text{Cu}^{2+}, \text{NO}_3^-, \text{Fe}^{2+}, \text{H}_3\text{BO}_3$

(B) $\text{NO}_3^-, \text{Cl}^-, \text{H}_2\text{PO}_4^-, \text{MoO}_4^{2-}$

(C) $\text{NO}_3^-, \text{Cl}^-, \text{H}_3\text{BO}_3$

(D) $\text{Cl}^-, \text{H}_3\text{BO}_3, \text{NH}_4^+$

Choose the correct answer from the options given below:
1. (A), (B) and (D) only
2. (C) only
3. (A), (B), (C) and (D)
4. (A) and (D) only

मृदा में गतिशील पोषक तत्वों (mobile nutrients) की पहचान कीजिए:

(A) $\text{Cu}^{2+}, \text{NO}_3^-, \text{Fe}^{2+}, \text{H}_3\text{BO}_3$

(B) $\text{NO}_3^-, \text{Cl}^-, \text{H}_2\text{PO}_4^-, \text{MoO}_4^{2-}$

(C) $\text{NO}_3^-, \text{Cl}^-, \text{H}_3\text{BO}_3$

(D) $\text{Cl}^-, \text{H}_3\text{BO}_3, \text{NH}_4^+$

नीचे दिए गए विकल्पों में से सही उत्तर का चयन कीजिए:
1. केवल (A), (B) और (D)
2. केवल (C)
3. (A), (B), (C) और (D)
4. केवल (A) और (D)

(A), (B) and (D) only केवल (A), (B) और (D) (C) only केवल (C) (A), (B), (C) and (D) (A), (B), (C) और (D) (A) and (D) only केवल (A) और (D)

Nutrient mobility in soil is governed by electrostatic interaction with negatively charged soil colloids:
Mobile nutrients: Nitrate ($\text{NO}_3^-$) and Chloride ($\text{Cl}^-$) are monovalent anions that do not adsorb onto negative clay surfaces; Boric acid ($\text{H}_3\text{BO}_3$) exists as an uncharged neutral molecule in standard soil pH and moves freely with soil water.
Immobile/less mobile nutrients: Cations ($\text{Cu}^{2+}, \text{Fe}^{2+}, \text{NH}_4^+$) are strongly bound by cation exchange, and Phosphate ($\text{H}_2\text{PO}_4^-$) is strongly fixed by chemical precipitation and ligand exchange.

Therefore, the group consisting exclusively of mobile nutrients is (C) $\text{NO}_3^-, \text{Cl}^-, \text{H}_3\text{BO}_3$ only. Hence, Option 2 ((C) only) is correct.

मृदा में पोषक तत्वों की गतिशीलता का वर्गीकरण:
गतिशील पोषक तत्व (Mobile nutrients): नाइट्रेट ($\text{NO}_3^-$) और क्लोराइड ($\text{Cl}^-$) ऋणायन होने के कारण मृदा कोलाइड्स द्वारा प्रतिकर्षित होते हैं; बोरिक अम्ल ($\text{H}_3\text{BO}_3$) उदासीन अणु होने के कारण जल के साथ स्वतंत्र रूप से बहता है।
गतिहीन पोषक तत्व: धनायन ($\text{Cu}^{2+}, \text{Fe}^{2+}, \text{NH}_4^+$) धनायन विनिमय द्वारा बंधे होते हैं और फास्फेट ($\text{H}_2\text{PO}_4^-$) मृदा में स्थिर हो जाता है।

अतः केवल समूह (C) में सभी तत्व पूर्णतः गतिशील हैं। अतः सही उत्तर केवल (C) है।

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ICAR AIEEA PG Physical Science 09 July 2023 (Shift 1) Paper

MCQ (Single Correct)

Arrange the minerals based on the descending order of weatherability:

(A) $\text{Biotite} > \text{Augite} > \text{Garnet} > \text{Quartz}$

(B) $\text{Zircon} > \text{Tourmaline} > \text{Olivine} > \text{Muscovite}$

(C) $\text{Albite} > \text{Ilmenite} > \text{Hornblende} > \text{Olivine}$

(D) $\text{Anorthite} > \text{Apatite} > \text{Zircon} > \text{Titanite}$

Choose the correct answer from the options given below:
1. Only (A)
2. (A) and (B)
3. (A), (B) and (C)
4. (A), (B), (C) and (D)

अपक्षयता (weatherability) के घटते क्रम (descending order) के आधार पर खनिजों को व्यवस्थित कीजिए:

(A) $\text{बायोटाइट} > \text{ऑजाइट} > \text{गार्नेट} > \text{क्वार्ट्ज}$

(B) $\text{जिरकॉन} > \text{टूरमैलीन} > \text{ऑलीवाइन} > \text{मस्कोवाइट}$

(C) $\text{एल्बाइट} > \text{इल्मेनाइट} > \text{हॉर्नब्लेंड} > \text{ऑलीवाइन}$

(D) $\text{एनॉर्थाइट} > \text{एपेटाइट} > \text{जिरकॉन} > \text{टाइटेनाइट}$

नीचे दिए गए विकल्पों में से सही उत्तर का चयन कीजिए:
1. केवल (A)
2. (A) और (B)
3. (A), (B) और (C)
4. (A), (B), (C) और (D)

Only (A) केवल (A) and (B) (A) और (A), (B) and (C) (A), (B) और (C) (A), (B), (C) and (D) (A), (B), (C) और (D)

Weatherability refers to the susceptibility or ease with which a mineral undergoes chemical weathering:
Highly weatherable minerals: Olivine, Augite, Biotite.
Moderately resistant: Garnet, Feldspars, Muscovite.
Highly resistant (lowest weatherability): Quartz, Tourmaline, Zircon.
In sequence (A), the ferromagnesian minerals (Biotite/Augite) have far higher weatherability than Garnet, which in turn weathers faster than Quartz (the most resistant residual mineral). Thus (A) represents a valid descending order of weatherability.
Sequences (B), (C), and (D) incorrectly place ultra-resistant heavy minerals (Zircon, Tourmaline) as having higher weatherability than easily weatherable minerals like Olivine.

Therefore, Only (A) is correct.

खनिजों की अपक्षयता (weatherability - आसानी से टूटने का गुण):
ऑलीवाइन, ऑजाइट और बायोटाइट सबसे पहले अपक्षयित होते हैं (उच्च अपक्षयता)।
गार्नेट मध्यम प्रतिरोधी है।
क्वार्ट्ज और जिरकॉन सबसे अंत में अपक्षयित होते हैं (अत्यधिक प्रतिरोधी, न्यूनतम अपक्षयता)।
क्रम (A) में बायोटाइट/ऑजाइट की अपक्षयता गार्नेट और क्वार्ट्ज से अधिक है, जो सही घटता क्रम है। अन्य विकल्पों में जिरकॉन जैसे अत्यधिक प्रतिरोधी खनिजों को सबसे आगे रखा गया है जो गलत है।

अतः केवल (A) सही है।

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

ICAR AIEEA PG Physical Science 09 July 2023 (Shift 1) Paper

MCQ (Single Correct)

Quantity of $\text{Na}_2\text{CO}_3$ required to prepare $500\text{ ml}$ of $0.1\text{ N } \text{Na}_2\text{CO}_3$ is _____ $\text{g}$:

1. $2.65$

2. $0.265$

3. $26.5$

4. $0.00265$

$0.1\text{ N } \text{Na}_2\text{CO}_3$ का $500\text{ ml}$ विलयन तैयार करने के लिए आवश्यक $\text{Na}_2\text{CO}_3$ की मात्रा _____ $\text{g}$ है:

1. $2.65$

2. $0.265$

3. $26.5$

4. $0.00265$

65 65 265 265 5 5 00265 00265

ICAR AIEEA PG Physical Science 09 July 2023 (Shift 1) Paper

MCQ (Single Correct)

Estimating the colored complex with chelating agent is:

1. Precipitometry

2. Complexometry

3. Argentometry

4. Thiocyanometry

कीलेटिंग एजेंट (chelating agent) के साथ रंगीन संकुल का आकलन करना कहलाता है:

1. अवक्षेपणमिति (Precipitometry)

2. संकुलमिति (Complexometry)

3. अर्जेंटोमिति (Argentometry)

4. थायोसायनोमिति (Thiocyanometry)

Precipitometry अवक्षेपणमिति Complexometry संकुलमिति Argentometry अर्जेंटोमिति Thiocyanometry थायोसायनोमिति

ICAR AIEEA PG Physical Science 09 July 2023 (Shift 1) Paper

Match the Following

Match List-I with List-II:

Choose the correct answer from the options given below:

सूची-I को सूची-II के साथ सुमेलित कीजिए:

नीचे दिए गए विकल्पों में से सही उत्तर का चयन कीजिए:

List - I सूची - I Concept / Theory proposed अवधारणा / सिद्धांत		List - II सूची - II Author वैज्ञानिक
A	Father of fertilizer chemistry उर्वरक रसायन विज्ञान के जनक	I	Jackson जैक्सन (Jackson)
B	Nutrient index पोषक तत्व सूचकांक (Nutrient index)	II	Stanley A. Barber स्टेनली ए. बार्बर
C	Root interception जड़ अवरोधन (Root interception)	III	Liebig लीबिग (Liebig)
D	Weathering index अपक्षय सूचकांक (Weathering index)	IV	Parker पार्कर (Parker)

(A)-(II), (B)-(III), (C)-(IV), (D)-(I) (A)-(II), (B)-(III), (C)-(IV), (D)-(I) (A)-(I), (B)-(II), (C)-(III), (D)-(IV) (A)-(I), (B)-(II), (C)-(III), (D)-(IV) (A)-(I), (B)-(II), (C)-(IV), (D)-(III) (A)-(I), (B)-(II), (C)-(IV), (D)-(III) (A)-(III), (B)-(IV), (C)-(II), (D)-(I) (A)-(III), (B)-(IV), (C)-(II), (D)-(I)

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Point out the mobile nutrients in soil: (A) Cu²⁺, NO₃⁻, Fe²⁺... | Agrigyan

Physical Science Subjects

General Agriculture, Crop Production, Physiology & Rural Development

Analytical, Physical & Organic Chemistry and Pesticides

Pedology, Soil Physics, Soil Colloids, Problem Soils & Water Quality

Soil Fertility, Classification, Remote Sensing, Soil Biology, Fertilizers & Pollution

Previous Year Papers of Physical Science

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ICAR AIEEA PG Physical Science 14 July 2023 Shift-1 Paper

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