Correct Answer: Option:

Question16:-Assertion A: Barium is strongly adsorbed by the clay but appears to have low penetrating power.
‏ومودعم‎ 8: Itexchange is less than would be expected from the amount of Ba adsorbed.

‘AAssertion and Reason both are correct and R is nat the correct explanation of A
B:-Assertion and Reason both are correct and R is the correct explanation of A.
C:Reason is correct but assertion is wrong

D-Both assertion and reason both are wrong

Correct Answer: Option ®

Question17:-Assertion A: Transition metals like Al, Fe, Mn, Cu and Zn and the organic compounds forms metal-organo complexes or chelates.
Reason R: Humic and fulvic acids are especially important in the formation of such complexes.

‘AcAssertion is correct but reason is correct and R is not the correct explanation of A.
B:-Reason is correct but assertion is wrong.
C=Both assertion and reason both are wrong.
D-Assertion and reason both are correct and R is the correct explanation of A
Correct Answer:- Option-D

Question18:-Rank the following moisture regimes below from driest to wettest
கபரிய கடட எச
Bs-Aquic, udic, aridic
CeXeric, udie, aquie
D-Udic, erie ०१५८
Correct Answer:- Option-C

Question19:-Immobilization of sulphur occur in soil when

ratio is
५-<300:1

B:->300:1

= |

Di-<200:1

Correct Answer:- Option-C

‘Question20:-Match the following:

1 ട്ട 2. Mehlich
॥ ‏مع‎ b. 8९०८१
M196 Citric Acia ಆ... Ramamoorthy

IV. Complimentary ion principled. Dyer

Ack, thd, tka, Ve

പിക

പിക ۱۷۵

പിക

Correct Answer:- Option-é
Question21:-Recently invaded insect that threatened maize cultivation in India is

‘Ac Spodoptera frugiferda

B:-Spodoptera ധര

C-Spodoptera exigua

D-Mythimna separata

Correct Answer:- Option-é
Question22:-Calasobruchus chinensis is @ pest on pulses in

കര്‍

B:-Storage

೦-800 Land 2

D:-None

Correct Answer:- Option-C
Question23:-Recently discovered new insect order is

‘Ac Mantophasmatodea

B:-Grylloblattodea

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