Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the ___________________?

Byadmin March 11, 2019August 29, 2021

Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the ___________________?

A. Presence of an inert atmosphere
B. Presence of a reducing atmosphere
C. Absence of air
D. Presence of an oxidising atmosphere

Fertilizer Technology

Fertiliser value of a nitrogenous fertiliser is expressed in terms of its ______________ content?

Fertiliser value of a nitrogenous fertiliser is expressed in terms of its ______________ content?

A. N2
B. KNO3
C. NO2
D. NHO3

Read More Fertiliser value of a nitrogenous fertiliser is expressed in terms of its ______________ content?
Fertilizer Technology

Which of the following does not come under the category of ‘secondary nutrient’ for plant growth ?

Which of the following does not come under the category of ‘secondary nutrient’ for plant growth ?

A. Calcium
B. Magnesium
C. Sulphur
D. Oxygen

Read More Which of the following does not come under the category of ‘secondary nutrient’ for plant growth ?
Fertilizer Technology

In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at________________?

In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at________________?

A. Low pressure
B. High pressure
C. Very high temperature
D. Atmospheric pressure; as the pressure has no effect on conversion

Read More In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at________________?
Fertilizer Technology

Plant tranquillisers___________________?

Plant tranquillisers___________________?

A. Hold back stem growth and halt plants at a desired height
B. Cause early maturation of plants
C. Accelerate ripening of food and grain
D. Produce seedless fruit

Read More Plant tranquillisers___________________?
Fertilizer Technology

Heating of ortho-phosphoric acid to 250°C produces___________________?

Heating of ortho-phosphoric acid to 250°C produces___________________?

A. Meta-phosphoric acid
B. Pyrophosphoric acid
C. No change in it
D. None of these

Read More Heating of ortho-phosphoric acid to 250°C produces___________________?
Fertilizer Technology

Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature___________________?

Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature___________________?

A. Rate of reaction is very low
B. Very high pressure is required resulting in costly pressure vessel
C. Space velocity of gas is very low resulting in decreased conversion
D. None of these

Read More Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature___________________?

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