Cotton MCQs - ICAR JRF - IBPS AFO - AGRI MPSC - AGRONOMY JRF

1. Which of the following cotton spp are known as American cotton of new world cotton?

A) Gossypium herbaceum
B) Gossypium Hirsutum
C) Gossypium barbadence
D) Both B and C

ANSWER=D) Both B and C
Explain:-. Classification of Cotton 

 A) Gossypium herbaceum:- Found Throughout the India and it’s chromosome number CN = 2n=24 

 B) Gossypium arboreum :- also known as Indian cotton (2n=22)

 C) Gossypium hirsutum :- also known as American cotton (2n=52) 

 D) Gossypium barbadrnce :- Sea island /Egyptian cotton (2n=52) 

 *Gossypium herbaceum and Gossypium arboreum are Designed Cotton species also known as Old World Cotton.

 *Gossypium hirsutum and Gossypium barbadrnce are American cotton species also known as New World Cotton.

 

2. Which state has highest area under cotton cultivation in India?

A) Gujaraat
B) Maharashtra
C) Karnataka
D) Andhra pradesh

ANSWER= (B) Maharashtra
Explain:- Maharashtra has the largest area under cotton cultivation followed by Gujaraat

 

3. Which one of the following is reproductive branches in cotton?

A) Sympodial
B) Monopodial
C) Both A and B
D) None of these

ANSWER= (A) Sympodial
Explain:- There are two types of branches found in cotton A) Monopodial :- Vegetative branches B) Sympodial :- Reproductive branches

 

4. Weight of one bale of cotton is

A) 200 kg
B) 100 kg
C) 170 kg
D) 270 kg

ANSWER= (C) 170 kg
A) Explain:- 170 kg

 

5. Chromosome number of Gossypium barbadence

A) 2n=24
B) 2n=26
C) 2n=52
D) 2n=12

ANSWER= (C) 2n=52
A) Explain:- Chromosome number of G.barbadence and G.hirsutum both have 2n=52, they are Tetraploid cotton spp. Chromosome number of G.herbaceum and G.arboreum both have 2n=26, They are Diploid cotton spp.

 

6. Which toxic compound is found in Cotton?

A) Alfatoxin
B) Tomatine
C) Solanine
D) Gossypol

ANSWER= (D) Gossypol
A) Explain:- 1)Alfatoxin :- Toxic substance found in groundnut 2)Tomatine :- Toxic substance found in Tomatine 3)Solanine :- Toxic substance found in Potato 4)Gossypol :- Toxic substance found in Cotton

 

7. In Cotton, Highest concentration of toxic substance Gossypol is found in

A) Leaves
B) Roots
C) Cotton seed
D) Flowers

ANSWER= (C) Cotton seed
A) Explain:- Cotton seed

 

8. Separation of fiber from cotton seed is known as…

A) Ginning
B) Topping
C) Priming
D) Curing

ANSWER= (A) Ginning
A) Explain:- Ginning:- Separation of fiber from cotton seed is known as ginning

 

9. Which cotton species has covered maximum area in India

A) Gossypium arborium
B) G. herbaceum
C) G. barbadence
D) G. hirsutum

ANSWER= (B) G. hirsutum
A) Explain:- out of four spp. G.hirsutum have highest area under cultivation and G. barbadence have very negligible area under cultivation in India.

 

10. Cotton is originated from....

A) India
B) USA
C) China
D) Mexico

ANSWER= (A) India
A) Explain:- Origin of Cotton is India

 

11. Maturity of Cotton fiber is measured by……

A) Arealometer
B) Refractometer
C) Micronaire
D) Fibrograph

ANSWER= (A) Arealometer
A) Explain:- Arealometer

 

12. Cotton is a…..

A) Self pollinated
B) cross pollinated
C) often cross pollinated
D) none of these

ANSWER= (C) often cross pollinated
A) Explain:- Cotton is a often cross pollinated crop

 

13. Which are the Critical growth stages in cotton for irrigation is

A) flowering
B) Boll formation
C) seedlings stage
D) Both A and B

ANSWER= (D) Both A and B
A) Explain:- flowering and Boll formation are the critical growth stage in cotton for irrigation.

 

14. Which is the first hybrid variety of cotton?

A) HB-1
B) H-4
C) Varalaxmi
D) ICPH – 8

ANSWER= (B) H-4
A) Explain:- World first cotton hybrid i.e H-4 was released in 1970 from Cotton Research Station Surat of Gujarat Agriculture University. This hybrid was developed by Dr. C.T.Patel who is rightly called as Father of Hybrid Cotton..

 

15.What is the Seed rate for Bt Cotton?

A) 10-18kg/ha
B) 6-8kg/ha
C) 2-3kg/ha
D) 1-1.5kg/ha

ANSWER= (D) 1-1.5 kg/ha
A) Explain:- 1-1.5 kg/ha