Calculate the percentage composition of the elements present in magnesium carbonate. How many kilogram of CO₂ can be obtained by heating 1 kg of 90 % pure magnesium carbonate.

What is the de Broglie wave length of an electron, which is accelerated from the rest, through a potential difference of 100 V ?

Why the first ionisation enthalpy of sodium is lower than that of magnesium while its second ionisation enthalpy is higher than that of magnesium.

Explain preparation of hydrogen using electrolysis.

Describe briefly the biological Importance of Calcium and magnesium.

Derive the values of critical constants in terms of van der Waals constants.

When I-pentyne (A) is treated with 4N alcoholic KOH at 175°C, it is converted slowly into an equilibrium mixture of 1.3% I-pentyne(A) , 95.2% 2-pentyne(B) and 3.5% of 1,2 pentadiene (C) the equilibrium was maintained at 175°C, calculate ΔG0 for the following equilibria.
B \(\rightleftharpoons \)AGIO?
B \(\rightleftharpoons \)CG20?

A sealed container was filled with 1 mol of A₂ (g), 1 mol B₂ (g) at 800 K and total pressure 1.00 bar. Calculate the amounts of the components in the mixture at equilibrium given that K = 1 for the reaction
A₂ (g) + B₂ (g) ⇌ 2AB (g)

Henry’s law constant for solubility of methane in benzene is 4.2 x 10^-5 mm Hg at a particular constant temperature At this temperature.
Calculate the solubility of methane at
i) 750 mm Hg
ii) 840 mm Hg

Give the structure for the following compound.
3- ethyl - 2 methyl -1-pentene

Identify the compound A, B, C and D in the following series of reactions

How is acid rain formed ? Explain its effect