Organic Chemistry — Chemistry STD 10 — Question

Answer the following questions with respect to the electrolytic process in the extraction of aluminium:
(i) Identify the components of the electrolyte other than pure alumina and the role played by each.
(ii) Explain why powdered coke is sprinkled over the electrolytic mixture.

By drawing the dot diagram, show the lone pair effect leading to the formation of hydronium ion from water and hydrogen ion.

CH₄ + 2O₂ → CO₂ + 2H₂O ...(1)
2H₂ + O₂ → 2H₂O ...(2)
Calculate the volume of oxygen required when a mixture of 33.6 dm³ of methane and 22.4 dm³ of hydrogen burn completely as shown by the equation above.

A balloon is filled with hydrogen gas (H₂) at a pressure of 1.5 atm and a temperature of 350 K. The balloon is then placed in a cooler environment where the temperature drops to 250 K, while the volume of the balloon remains constant.
(i) Determine the final pressure of the hydrogen gas in the balloon.
(ii) Explain why the pressure changes when the temperature changes, according to Gay Lussac's Law.

Give equation for the reduction of Zinc oxide

The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.

Give reason why:
Sodium chloride will conduct electricity only in fused or aqueous solution state.

Write the ionization of sulphuric acid showing the formation of hydronium ion.

(a) How does the atomic radius change in a period?
(b)

Element	P	Q	R
Atomic radius	1.86 A	2.31 A	1.52 A

Arrange the elements in the table above, such that the least metallic element comes first and the most metallic element comes last.

How is the structure of alkynes different from that of alkenes?