  Question

# A+C(carbon)Δ−−−−−−→High tempB+G(gas)G(gas)+O2−−−−−−−−−−−−−→Burn with blue flameD(gas)B+H2O⟶F+H(gas) A+H2O⟶F F+D(gas)→ milky solution, Milky solution disappears if more gas D is passed B+N2Δ−→J+Carbon List-I contains questions related to information given above and List-II contains their answer(s) as compounds from above information. List - IList - II(I)Which oxygen containing compound(s) is/are(P) Jbasic in nature?(II) Which compound(s) on hydrolysis can give urea?(Q) B(III) Which compound(s) has/have triple bond or(R) Fbond order equal to 3 but not contain(s) nitrogen?(IV) Which gas(es) on combustion give(s) D(S) A(T) G(U) H Which of the following options has the correct combination considering Lists-I, II?(I), (S) and (II), (U)(I), (R) (S) and (II), (P)(I), (R) (S) (T) and (II), (P)(I), (Q) (R) (S) (U) and (II), (U)

Solution

## The correct option is B (I), (R) (S) and (II), (P)Since F+D→milky solution, So D(gas)=CO2 and F=Ca(OH)2. Given, A+H2O→Ca(OH)2  Thus, A=CaO Again, CaO+carbonΔ−→B+G(gas) ∴B=CaC2 Also, G (gas) burns with blue flame. So, it is CO Given, CaC2+N2Δ−→J+Carbon ∴J=CaCN2 CaC2+H2O⟶Ca(OH)2+H(gas) H(gas)=C2H2 So, we have, CaO and Ca(OH)2 as oxygen containing compounds which are basic in nature  Ca(CN)2 on reaction with water gives urea.  Suggest corrections   