A. Infinity
B. Minus infinity
C. Zero
D. None of these
✅ The correct answer is option B.
Engineering
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3922. For an isothermal reversible compression of an ideal gas
A. Only ΔE = 0
B. Only ΔH =0
C. ΔE = ΔH = 0
D. DQ = dE
✅ The correct answer is option C.
3923. Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because
It is hygroscopic and explosive in nature
It is highly acidic in nature
It is a liquid at room temperature
Its nitrogen content is very less
✅ The correct answer is option A.
3924. Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.
Exothermic
Endothermic
Autocatalytic
Catalytic
✅ The correct answer is option B.
3925. Chemical formula of biuret is
NH₂.CO.NH₂
NH₃.COO.NH₃
NH₂CONHCONH₂
NH₄COONH₂
✅ The correct answer is option C.
3926. The enthalpy change when ammonia gas is dissolved in water is called the heat of
A. Solution
B. Formation
C. Dilution
D. Combustion
✅ The correct answer is option A.
3927. With increase in pressure (above atmospheric pressure), the Cp of a gas
A. Increases
B. Decreases
C. Remains unchanged
D. First decreases and then increases
✅ The correct answer is option A.
3928. Fertiliser plant making ammonium sulphate employing gypsum-ammonia reaction (usual practice is to use ammonia and sulphuric acid) is located at
Rourkela (under SAIL)
Bokaro (under SAIL)
Sindri (under FCI)
Baroda (under G.S.F.C.)
✅ The correct answer is option C.
3929. Which is a catalyst promoter used in catalytic ammonia synthesis reaction?
Al₂O₃
Cr₂O₃
K₂O
MnO
✅ The correct answer is option C.
3930. Leaching of phosphate rock by strong __________ acid produces phosphoric acid.
Sulphuric
Hydrochloric
Either A or B
Neither A nor B
✅ The correct answer is option C.