Chemistry

Calculate the volume occupied by 12.0 g of propane gas at 60°C and 740 mm of pressure. (Molecular weight of C = 12 g/mol , H = 1 g/mol ) [R = 0.082 L atm/molK]

How much propyl alcohol must be added to 1.00lt. of water so the solution will not freeze at –15°C ? (K_f of water = 1.86 KKgmol^-1)[d(H₂O) = 1 g/ml and molecular mass of propyl alcohol = 60 g/mol ]

In an estimation of sulphur by carius method, 0.25gm of an organic compound gave 0.35gm of BaSO₄. The mass percentage of sulphur in the compound is (Molecular weight of BaSO₄ = 233 g/mol )

6.84gm Al₂(SO₄)₃ is needed to coagulate 2.5 L of As₂S₃ sol completely in 2.0 hrs. The coagulation value of Al₂(SO₄)₃ in terms of millimoles per litre is:

[Atomic Mass : Al = 27, S = 32].

The incorrect statement for lyophilic colloids is

An ionic compound (A⁺B^-) crystallizes in rock salt structure. If the ionic radii of A⁺ and B^- is 200pm and 400pm respectively, then calculate distance between nearest anions in Å.

The correct statement is:

The Lanthanoid that does not show +2 oxidation states is:

What is the molecular weight of the final product in the following reaction sequence

Total number of species in which atleast one atom have same hybridization as in central atom of azide ion.

N₂O, C₂H₂, CO₂, C₃O₂, BeF₂, NO₂, PF₃