A. An increase of 50 mL B. An increase of 100 mL C. An increase of 150 ml D. A decrease of 50 mL Solution: (A) When we heat 100 mL of PH3 it... View Article
A. 1.08 kg B. 0.86 kg C. 0.68 kg D. 1.68 kg Solution: (B) V / T = nR / p V and T for both cases are the same. Hence, N1 / p1 = n2 / p2 or... View Article
A. 0.05 mole B. 0.025 mole C. 0.10 mole D. 0.005 mole Solution: (B) Let (NH4)2SO4 to be added to 500 mL solution = x mol [NH4+] = 4xM pH =... View Article
A. NaF B. NaCI C. NaBr D. NaI Solution: (A) If we look at the general rule: “going down in a group, ionic radius increases and lattice... View Article
The major commercial source of helium is natural gas which contains an average of 0.4% helium. Helium is also produced in the earth by the... View Article
A. 80 B. 160 C. 240 D. 320 Solution: (A) ∵ 24 gms of propane reacts with 160 gms of bromine. ∴ 21 gms of propane 160 / 42 × 21 = 80 gms.... View Article
εC − HεO = OεC = OεO − HεC − C +x1 + x2 + x3 + x4 + x5 Resonance energy of CO2 is kJ/mol and ΔH vaporization[H2O(l)] is y(kJ/mol) A. 8x1 + 2x5... View Article
A. Λ = x × 1000 / 0.1 B. Λ = 2 × 1000 / x × 0.1 C. Λ = x × 1000 / 0.5 D. Λ = 0.5 / 1000 x Solution: (B) Λ = 2 × 1000 / x × 0.1 We know, N... View Article
A. Propanoyl Chloride B. Ethanoyl Chloride C. Acetyl Chloride D. Chloroethane Solution: (A) CH3CH2COCl has three carbon atoms in the parent... View Article
A. -2, -5, -1 ,0 B. +5, +7, -1 , 0 C. +2, +5, +1 , 0 C. -1, +1 , 0, +1 Solution: (B) We willl take the oxidation number of iodine as x. The... View Article
A. HCl B. H2SO4 C. HNO3 D. None of the above Solution: (B) Platinised asbestos is used as a catalyst in the manufacture of H2SO4 (Sulphuric Acid).... View Article
