Subject: Physical Science

Question

A gas of mass 2 g occupies a volume of 820 ml at 7°C temperature and 2 atm pressure. Determine the molar mass of the gas. [R = 0.082 L atm mole⁻¹ K⁻¹]

A gas of mass 2 g occupies a volume of 820 ml at 7°C temperature and 2 atm pressure. Determine the molar…

13/08/2026

Question

A fixed mass of gas kept at 0°C is heated. What will be the temperature of the gas when both its pressure and volume are doubled compared to the initial values?

A fixed mass of gas kept at 0°C is heated. What will be the temperature of the gas when both its pressure…

13/08/2026

Question

What is the concept of sustainable development?

What is the concept of sustainable development?

13/08/2026

Question

Write one use of PVC

Write one use of PVC.

13/08/2026

Question

Write the structural formula of ethanoic acid.

Write the structural formula of ethanoic acid.

12/08/2026

Question

Write the IUPAC name of the organic compound: CH₃–CH(OH)–CH₃

Write the IUPAC name of the organic compound: CH₃–CH(OH)–CH₃

12/08/2026

Question

Write the chemical equation for the reaction between two gases to produce a solid substance.

Write the chemical equation for the reaction between two gases to produce a solid substance.

12/08/2026

Question

Fill in the blank: 2NH₃ + CO₂ → ______ + H₂O

Fill in the blank: 2NH₃ + CO₂ → ______ + H₂O

12/08/2026

Question

Write the formula of the black precipitate formed when H₂S gas is passed through an aqueous solution of lead nitrate.

Write the formula of the black precipitate formed when H₂S gas is passed through an aqueous solution of lead nitrate.

12/08/2026

Question

Why cannot alternating current be used in electrolysis?

Why cannot alternating current be used in electrolysis?

12/08/2026