📚NCERT Questions — CBSE11

When an ideal gas is compressed by a constant external pressure p_ex, what is the expression for the work done (w) on the system?

Which prefix corresponds to 10^9?

Calculate the mass of water (in g) produced by the combustion of 16 g of methane (CH4). (CH4 + 2O2 → CO2 + 2H2O; Atomic masses: C=12, H=1, O=16)

Which of the following is a state function?

What is the hybridisation of carbon atoms in ethene (C2H4)?

Which of the following reactions is an example of disproportionation?

In terms of oxidation number, what defines oxidation?

Given the following data: 1) CH₃OH(l) + ³/₂O₂(g) → CO₂(g) + 2H₂O(l); Δ_r H° = -726 kJ mol⁻¹ 2) C(graphite) + O₂(g) → CO₂(g); Δ_c H° = -393 kJ mol⁻¹ 3) H₂(g) + ½O₂(g) → H₂O(l); Δ_f H° = -286 kJ mol⁻¹ C

What is the approximate value of the Avogadro constant (Avogadro number)?

What is electrovalency?