Questions and answers for exam Preparation

MCQs

Total Questions : 1041 | Page 104 of 105 pages

Question 1031. Which of the following fertilisers contains the least percentage of nitrogen ?

Liquid ammonia
Urea
Ammonium phosphate
Ammonium sulphate

Discuss Question

Answer: Option C. -> Ammonium phosphate
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1032. Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it___________________?

Has a pungent smell
Vaporises at normal temperature
Is toxic and highly corrosive
Is in short supply

Discuss Question

Answer: Option B. -> Vaporises at normal temperature
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1033. PH value of soil is maintained at ______________ by the addition of fertiliser for optimum growth and health of the plant?

4-5
7-8
9-10
12-13

Discuss Question

Answer: Option B. -> 7-8
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1034. Pick out the wrong statement?

All the nitrogenous fertilisers are not soluble in water
A straight fertiliser contains only one nutrient
Calcium cyanamide is used as weed killer in onion fields
The phosphorous nutrient makes the plant stem stronger and increases its branches

Discuss Question

Answer: Option A. -> All the nitrogenous fertilisers are not soluble in water
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1035. Pick out the wrong statement ?

Nitrogen is normally supplied in fertiliser either in Ammoniacal or the nitrate form, from which the soil takes it up in the form of ammonium ions or
Calcium present in the fertiliser helps in correcting the soil acidity
Particle size range of a good granular fertiliser is 10-15 mesh and it contains less moisture as compared to finely divided powder form of fertiliser
Ammonium nitrate fertiliser is obtained as a by-product in an integrated steel plant having byproduct coke ovens

Discuss Question

Answer: Option D. -> Ammonium nitrate fertiliser is obtained as a by-product in an integrated steel plant having byproduct coke ovens
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1036. Pick out the wrong statement ?

‘Green acid’ is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid
Chemically unreactive nature of red phosphorous is due to its polymeric structure
Red phosphorous is the most reactive allotropic form of phosphorous
Red phosphorous, which is used in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation

Discuss Question

Answer: Option C. -> Red phosphorous is the most reactive allotropic form of phosphorous
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1037. Pick out the correct statement?

Reaction of NH3 with HNO3 to produce (NH4)2NO3 is endothermic
With increase in NH3/CO2 ratio, urea yield decreases for a given temperature, pressure and total feed rate
Biuret (an intermediate during urea manufacture) is toxic to seeds and animals
Both B. and C.

Discuss Question

Answer: Option B. -> With increase in NH3/CO2 ratio, urea yield decreases for a given temperature, pressure and total feed rate
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1038. Oxidation of ammonia is________________?

Exothermic
Endothermic
Non-catalytic
Autocatalytic

Discuss Question

Answer: Option A. -> Exothermic
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1039. Pick out the wrong statement?

Dehydration of ammonium carbamate to produce urea is endothermic
Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable
Gypsum (CaSO4. 2H2O) is obtained as a by-product in the wet process for manufacture of ortho-phosphoric acid
Phosphate rock when reacted with dilute H2SO4 produces superphosphate

Discuss Question

Answer: Option B. -> Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1040. Pick out the wrong statement?

Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water
Apatite is the principal material present in phosphate rock which is chemically Ca10 (PO4)6 (F, Cl, OH)
Urea is more hygroscopic than ammonium nitrate
Nitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound form

Discuss Question

Answer: Option C. -> Urea is more hygroscopic than ammonium nitrate
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!