A) \[{{N}_{2}}{{O}_{4}}+\] unsymmetrical dimethyl hydrazine
B) Nitroglycerine + nitrocellulose
C) Hydrazine \[+{{N}_{2}}{{O}_{4}}\]
D) Kerosene oil + liquid oxygen
Correct Answer: B
Solution :
In biliquid propellant, both the oxidiser like nitrogen tetraoxide \[({{N}_{2}}{{O}_{4}})\], liquid oxygen etc and fuels like hydrazine, kerosene, unsymmetrical dimethyl hydrazine etc are in liquid form. In nitroglycerine, nitrocellulose sets to a solid mass (here both the oxidiser and fuel elements are present in the same molecule), thus it is not a biliquid propellant.
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