Source of negative charges on silicate clays is/ are________?

A. Exposed crystal edges
B. Isomorphous substitution
C. Anion exchange
D. All of these

Submitted by: Shafiq Rehman

Related Mcqs:

Accumulation of Al and Fe oxides and clays coming from the upper profile layers:
A. Zone of eluviation
B. Zone of Illuviation
C. Zone of evaluation
D. None of the above
Submitted by: Shafiq Rehman
Soil order characterized by excess of weathering with dominant iron and aluminium oxide clays, common in tropics is_________?
A. Alfisols
B. Mollisols
C. Entisols
D. Oxisols
Submitted by: Shafiq Rehman
swelling clay soils, develop cracks due to greater proportion of swelling type clays:
A. Alfisols
B. Ultisols
C. Vertisols
D. None of the above
Submitted by: Shafiq Rehman
The kaolininte is a layer silicate clay mineral, it is 1:1 type of mineral with___________________?
A. 3-15 meq/100g CEC
B. 40 meq/100g CEC
C. 50 meq/100g CEC
D. None of the above
There are twelve soil orders found in the world of which six soil orders have been recognized at various locations are________?
A. Andisols, Gelisols, Histosols, Spodosols, Oxisols, Ultisols
B. Entisols, Inceptisols, Aridisols, Alfisols, Mollisols, Vertisols
C. Andisols, Aridisols, Histosols, Vertisols, Regosols, Libosols
D. The above statement is wrong
Submitted by: Shafiq Rehman
Common and easily available source of energy does not contain RNA__________________?
A. DNA
B. RNA
C. ATP
D. DNA/RNA
Norine 10 is the source of dwarfing gene in________________?
A. Wheat
B. Rice
C. Barley
D. Oat
capsicum is a rich source of___________________?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. None of the above
Fruits are an excellent source of_____________________?
A. Vitamins
B. Minerals
C. Carbohydrates
D. All the above
Fly larvae (maggots) move away from a bright source of light. This is an example of a ___________?
A. Taxis
B. Reflex (involuntary movement)
C. Kinesis
D. Transverse orientation (Keeping a fix angle on a distance)
Submitted by: Muhammad Amjad