Rajasthan Board Class 12 Question Paper 2025 Agriculture Chemistry

RAJASTHAN BOARD

QUESTION
PAPER
2025

ANNUAL EXAMINATION

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Zm_m§H$ Roll No.

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No. of Questions – 18 SS–38–Ag.Chem.
No. of Printed Pages – 11

Cƒ _mÜ`{_H$ narjm, 2025
SENIOR SECONDARY EXAMINATION, 2025
H¥${f agm¶Z {dkmZ

TEAR HERE TO OPEN THE QUESTION PAPER
AGRICULTURE CHEMISTRY
g_` : 3 KÊQ>o 15 {‘ZQ>

àíZ nÌ H$mo ImobZo Ho$ {bE `hm± \$m‹S>|
nyUmªH$ : 56

narjm{W©`m| Ho$ {bE gm_mÝ` {ZX}e …
GENERAL INSTRUCTIONS TO THE EXAMINEES :
1) narjmWu gd©àW_ AnZo àíZ nÌ na Zm_m§H$ A{Zdm`©V… {bI| &
Candidate must write first his / her Roll No. on the question paper compulsorily.
2) g^r àíZ A{Zdm`© h¡ &
All the questions are compulsory.
3) àË`oH$ àíZ H$m CÎma Xr JB© CÎma-nwpñVH$m _| hr {bI| &
Write the answer to each question in the given answer-book only.
4) {OZ àíZm| _| AmÝV[aH$ IÊS> h¢, CZ g^r Ho$ CÎma EH$ gmW hr {bI| &
For questions having more than one part, the answers to those parts are to be
written together in continuity.
5) àíZ nÌ Ho$ {hÝXr d A§J«oOr ê$nmÝVa _| {H$gr àH$ma H$s Ìw{Q> / AÝVa / {damoYm^mg hmoZo na {hÝXr ^mfm Ho$
àíZ H$mo ghr _mZ| &
If there is any error / difference / contradiction in Hindi & English version of the
`hm± go H$m{Q>E

question paper, the question of the Hindi version should be treated valid.
6) àíZ H$m CÎma {bIZo go nyd© àíZ H$m H«$‘m§H$ Adí¶ {bI|&
Write down the serial number of the question before attempting it.

SS-38-Ag.Chem. 7030 [ Turn Over

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IÊS> - A
SECTION - A
dñVw{Zð> àíZ :
Multiple Choice Questions :
1) {ZåZ{b{IV àíZm| ‘| CÎma H$m ghr {dH$ën M¶Z H$a CÎma nwpñVH$m ‘| {b{IE &
In the following questions, select the correct answer and write it in the answer
book.
i) {×Vr`H$ I{ZO H$m CXmhaU h¡- [½]
(A) MyZm - nËWa (~) ŠdmQ>©O
(g) hr_oQ>mBQ> (X) _mBH$m
An example of a secondary mineral is -
(A) Lime-stone (B) Quartz
(C) Hematite (D) Mica
ii) _¥Xm _| Ordm§e nXmW© H$s à{VeV _mÌm hmoVr h¡- [½]
(A) 5 (~) 45
(g) 25 (X) 20
The Soil contains a percentage of organic matter is -
(A) 5 (B) 45
(C) 25 (D) 20
iii) AmŠOo{bH$ Aåb H$m amgm`{ZH$ gyÌ h¡ - [½]
(A) C6H8O 7 (~) (COOH)2
(g) C3H6O 3 (X) C6H 12O 6
The chemical formula of oxalic acid is -
(A) C6H8O 7 (B) (COOH)2
(C) C3H6O 3 (D) C6H 12O 6
iv) {ZåZ _§o go H$m~©{ZH$ H$mobm°BS> h¡ - [½]
(A) {g{bHo$Q> (~) Am`aZ
(g) Eë`y{_{Z`_ (X) øy_g
Which of the following is an organic colloid-
(A) Silicate (B) Iron
(C) Aluminium (D) Humus

SS-38-Ag.Chem. 7030

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v) øy_g H$Um| na Amdoe hmoVm h¡- [½]
(A) F$U (~) YZ
(g) CXmgrZ (X) Cnamoº$ _| go H$moB© Zht
Humus particles have a charge-
(A) Negative (B) Positive
(C) Neutral (D) None of the above
vi) Ho$Amo{bZmBQ> H$s YZ Am`Z {d{Z_` j_Vm (C molkg–1) H$m Am¡gV _mZ hmoVm h¡ - [½]
(A) 8 (~) 80
(g) 30 (X) 100
The average value of cation exchange capacity (C molkg–1) of Kaolinite is -
(A) 8 (B) 80
(C) 30 (D) 100
vii) Johÿ± H$s \$gb H$mo ~moZo Ho$ {bE _¥Xm H$m Cn`wŠV pH _mZ h¡ - [½]
(A) 4.0 - 5.0 (~) 6.0 - 7.5
(g) 5.5 - 5.8 (X) 9.0 - 9.5
The suitable pH value of soil for sowing wheat crop is -
(A) 4.0 - 5.0 (B) 6.0 - 7.5
(C) 5.5 - 5.8 (D) 9.0 - 9.5
viii) gëâ`y[aH$ Aåb H$m amgm`{ZH$ gyÌ h¡ - [½]
(A) HCl (~) H2CO3
(g) H2SO 4 (X) HNO3
The chemical formula of sulphuric acid is-
(A) HCl (B) H2CO3
(C) H2SO 4 (D) HNO3

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ix) ZmBQ´>moOZ nm¡Ym| Ho$ {bE Amdí`H$ nm¡fH$ VÎd h¡, Ho$ Am{dîH$maH$ h¢ - [½]
(A) n¡Q>agZ (~) bo{dZ
(g) S>r. í`mga (X) gmg
Nitrogen is an essential nutrient for plants, discovered by -
(A) Patterson (B) Lavin
(C) D. Shysar (D) SAS
x) nm¡Ym| Ho$ gyú_ nm¡fH$ h¢ - [½]
(A) Fe, S, N (~) Fe, P, K
(g) Fe, Ca, mg (X) Fe, Zn, mn
The micronutrients of plants are -
(A) Fe, S, N (B) Fe, P, K
(C) Fe, Ca, mg (D) Fe, Zn, mn
xi) A{YH$m§e nm¡Yo \$mñ\$moag H$mo {H$g ê$n _| J«hU H$aVo h¢? [½]

(A) H 2PO4 (~) PO4

(g) CaPO4 (X) FePO4
In which form do most plant absorb phosphorus?

(A) H 2PO4 (B) PO4

(C) CaPO4 (D) FePO4

xii) `y[a`m _| ZmBQ´>moOZ H$s à{VeV _mÌm hmoVr h¡ - [½]
(A) 25.0 (~) 18.0
(g) 46.0 (X) 60.0
Urea contains nitrogen percentage is -
(A) 25.0 (B) 18.0
(C) 46.0 (D) 60.0

SS-38-Ag.Chem. 7030

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xiii) \$gbm| _| S>mB_oWmoEQ> 30 EC Ho$ à`moJ níMmV à{Vjm Ad{Y h¡ - [½]
(A) 5 {XZ (~) 15 {XZ
(g) 10 {XZ (X) 20 {XZ
Waiting period after application of Dimethoate 30 EC in Crops are -
(A) 5 days (B) 15 days
(C) 10 days (D) 20 days
xiv) nopßgZ EOm§B_ H$m _w»` CËnmX h¡ - [½]
(A) nm°brnoßQ>mBS> (~) _mëQ>mog
(g) noßQ>mBS> (X) ½byH$mog
The main product of pepsin enzyme is -
(A) Polypeptide (B) Maltose
(C) Peptide (D) Glucose
xv) _±yJ\$br H$s Ibr _| ZmBQ´>moOZ H$s à{VeV _mÌm hmoVr h¡ - [½]
(A) 7.29 (~) 5.21
(g) 6.22 (X) 4.92
Groundnut cake contains percentage of Nitrogen is -
(A) 7.29 (B) 5.21
(C) 6.22 (D) 4.92
xvi) Jm` Ho$ XÿY _| àmoQ>rZ H$s à{VeV _mÌm hmoVr h¡ - [½]
(A) 4.5 (~) 5.5
(g) 3.5 (X) 6.5
Cow's milk contains a percentage of protein is -
(A) 4.5 (B) 5.5
(C) 3.5 (D) 6.5

SS-38-Ag.Chem. 7030 [ Turn Over

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xvii) Am±Ì ag ×mam òm{dV EÝOmB_ H$m Zm_ h¡ - [½]
(A) Q>m`{bZ (~) nopßgZ
(g) {Q´>pßgZ (X) _mëQ>oO
The name of enzyme secreted from intestinal juice is -
(A) Tyline (B) Pepsin
(C) Trypsin (D) Maltase
xviii) Jm` Ho$ XÿY H$m Amno{jH$ KZËd hmoVm h¡ - [½]
(A) 1.028 (~) 1.032
(g) 1.020 (X) 1.022
The relative density of Cow's milk is -
(A) 1.028 (B) 1.032
(C) 1.020 (D) 1.022

2) [aº$ ñWmZm| H$s ny{V© H$s{OE -
Fill in the blanks -
i) _¥Xm EH$ ................ {nÊS> h¡ & [½]
Soil is a __________ body.
ii) H$mobm°BS> Ho$ H$U BboŠQ´>moZ ............. go hr {XImB© XoVo h¡ & [½]
The particles of colloids are visible only through electrone _________
iii) Xbh>Zr \$gbm| H$s O‹S>mo _| .......... OrdmUw hmoVo h¢ & [½]
_______ bacteria are found in the roots of legume crops.
iv) H¡$pëg`_ A_mo{Z`_ ZmBQ´>oQ> H$mo ............. ImX ^r H$hVo h¢ & [½]
Calcium ammonium nitrate is also called _________ Fertilizer.
v) gm_mÝ`V: dm`w _| AmŠgrOZ ............. à{VeV nmB© OmVr h¡ & [½]
Normally ________ percent oxygen is found in the air.

SS-38-Ag.Chem. 7030

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vi) A{YH$m§e \$gbmo§ ×mam \$mñ\$moag H$s ....... à{VeV _mÌm H$m hr Cn`moJ hmoVm h¡ & [½]

Most crops use only _____ percent of phosphorus.

vii) ŠbmoarZo{Q>S> hmBS´>moH$m~©Ýg AË`m{YH$ ..................... hmoVo h¢ & [½]

Chlorinated hydrocarbons are highly _________

viii) àmoQ>rZ Zm_ J«rH$ eãX ............. go {b`m J`m h¡ & [½]

The name protein is derived from the Greek word _________

ix) O¡{dH$ ImX Ho$ Cn`moJ go _¥Xm Vmn ............. _| ahVm h¡ & [½]

With the use of organic manure the soil temperature remains under ______

x) EOoQ>mo~oŠQ>a O¡d Cd©aH$ H$m Cn`moJ ............. \$gbm| _| {H$`m OmVm h¡ & [½]

Azotobacter biofertilizer is used in _______ crops.

3) {ZåZ{b{IV àíZm| Ho$ CÎma EH$ eãX ¶m EH$ n§{º$ ‘| {b{IE -
Write the answer of the following questions in one word or one line -

i) Am¾o` MQ²Q>mZ H$mo n[a^m{fV H$s{OE & [1]

Define Igneous rock.

ii) A_mo{ZH$aU {H$go H$hVo h¢? [1]

What is Ammonification?

iii) _¥Xm _| nm`o OmZo dmbo H$moB© Mma F$Um`Zm| Ho$ Zm_ {b{IE & [1]

Write the names of any four anions.

iv) gmo{S>`_ EgrQ>oQ> H$m amgm`{ZH$ gyÌ {b{IE & [1]

Write the chemical formula of sodium acetate.

v) Aåbr` _¥Xm H$mo n[a^m{fV H$s{OE & [1]

Define acidic soil.

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vi) nm¡Ym| _| H¡$pëg`_ nm¡fH$ VÎd H$m H$moB© EH$ H$m`© {b{IE & [1]

Write any one function of calcium nutrient in plants.

vii) _¥Xm H$mobmBS>g Ho$ H$Um| Ho$ ì`mg H$s CƒV_ gr_m {b{IE & [1]

Write the upper limit of the diameter of soil colloids particles.

viii) {H$Ýhr Xmo ZmBQ´>oQ> Cd©aH$m| Ho$ Zm_ {b{IE & [1]

Write names of any two nitrate fertilizers.

ix) ^maV _| {Z`pÝÌV H$moB© Xmo nr‹S>H$Zm{e`m| Ho$ Zm_ {b{IE & [1]

Write the name of any two pesticides restricted in India.

x) Q>moÊS> XÿY _| dgm H$s Ý`yZV_ à{VeV _mÌm {b{IE & [1]

Write the minimum percentage of fat in tonad milk.

IÊS> - ~

SECTION - B

bKwÎmamË‘H$ àíZ (CÎma gr‘m bJ^J 50 eãX)

Short answer type questions (Answer word limit approximately 50 words).

4) nm¡Ym| H$s O‹S>m| ×mam MQ²>Q>mZm| Ho$ Anj` Ho$ àXe©Z H$m {MÌ ~ZmBE & [1½]

Draw a diagram demonstrating the weathering of rocks by plant roots.

5) hçy_g Ho$ H$moB© VrZ amgm`{ZH$ JwU {b{IE & [3×½=1½]

Write any three chemical properties of humus.

SS-38-Ag.Chem. 7030

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6) AH$m~©{ZH$ Ed§ H$m~©{ZH$ _¥Xm H$mobm°BS> _| H$moB© VrZ AÝVa {b{IE & [3×½=1½]
Write any three differences between inorganic and organic soil colloids.

7) YZm`Z {d{Z_` j_Vm H$mo à^m{dV H$aZo dmbo H$moB© Xmo H$maH$ {b{IE & [¾+¾=1½]
Write any two factors affecting cation exchange capacity.

8) _¥Xm pH ñHo$b H$m Zm_m§{H$V {MÌ ~ZmBE & [1½]
Draw a labelled diagram of pH scale.

9) ‘¥Xm AåbVm H$m nm¡Ym| na àË`j à^md H$mo g_PmBE & [1½]
Explain the direct influences of soil acidity on plants.

10) nm¡Ym| _| nmoQ>me H$s H$_r Ho$ H$moB© VrZ bjU {b{IE & [3×½=1½]
Write any three symptoms of Potash deficiency in plants.

11) `y[a`m Cd©aH$ H$m g§KQ>Z Ed§ JwU {b{IE & [½+1=1½]
Write the composition and properties of urea fertilizer.

12) EÝOmB_ Ho$ H$moB© VrZ JwU Y_© {b{IE & [3×½=1½]
Write any three characteristics of enzyme.

13) Jmo~a H$s ImX Ho$ _w»` KQ>H$ {b{IE & [1½]
Write the main components of farm yard manures.

SS-38-Ag.Chem. 7030 [ Turn Over

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IÊS> - g
SECTION - C

XrK© CÎmar¶ àíZ (eãX gr‘m bJ^J 100 eãX)
Long answer type questions (Word limit approximately 100 words).

14) bdUr` _¥Xm _| O¡{dH$ gwYma Ho$ à~ÝYZ H$mo g_PmBE & [3]
Explain the management of biological amelioration in saline soil.

AWdm/OR

bdUr` Ob Ho$ CnMma H$mo g_PmBE &

Explain the treatment of saline water.

15) _¥Xm àXÿfU Ho$ à^md H$mo {dñVmanyd©H$ g_PmBE & [3]
Explain in detail the effects of soil pollution.

AWdm/OR

Üd{Z àXÿfU Ho$ à^md H$mo {dñVmanyd©H$ g_PmBE &

Explain in detail the effects of sound pollution.

16) Jmo~a H$s ImX ~ZmZo H$s g§emo{YV JS²>‹T>m {d{Y H$m dU©Z H$s{OE & >[3]
Describe the modified pit method of making farm yard manure.

AWdm/OR

Jmo~a H$s ImX ~ZmZo H$s Q´>|M {d{Y H$m dU©Z H$s{OE &

Describe the trench method of making Farm yard manure.

SS-38-Ag.Chem. 7030

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IÊS> - X
SECTION - D

{Z~ÝYmË‘H$ àíZ (eãX gr‘m bJ^J 250 eãX)
Essay type questions (Word limit approximately 250 words).

17) Ý`y{ŠbAmogmBS> Ed§ Ý`y{Šb`moQ>mBS> H$mo {dñVma go g_PmBE & [4]
Explain nucleaside and nucleotide in detail.
AWdm/OR
Ý`y{ŠbH$ Aåb H$mo {dñVma nyd©H$ g_PmBE &
Explain nucleic acid in detail.

18) Xþ½Y embm _| ~V©Zm| H$mo gm\$ H$aZo dmbo {H$Ýhr Xmo agm`Zm| Ho$ Zm_ {b{IE VWm ~V©Zm| H$mo gm\$ H$aZo H$s
{d{Y`m| H$m dU©Z H$s{OE & [1+1+2=4]

Write the names of any two chemicals used for cleaning utensils in dairy and also
describe the methods of cleaning utensils.

AWdm/OR
N>¡Zm H$mo n[a^m{fV H$s{OE BgH$m amgm`{ZH$ g§KQ>Z Ed§ ~ZmZo H$s {d{Y {b{IE &

Define chhana. Write its chemical composition and method of making it.

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SS-38-Ag.Chem. 7030

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