Ncert Solutions Chemistry Class 11th

The correct sequence of bond enthalpy of ' C – X ' bond is :

The maximum temperature that can be achieved in blast furnace is :

Tritium, a radioactive isotope of hydrogen, emits which of the following particles?

For a reaction A → B, enthalpy of reaction is −4.2 kJ mol¯¹ and enthalpy of activation is 9.6 kJ mol¯¹. The correct potential energy profile for the reaction is shown in option.

Zr(Z = 40) and Hf(Z = 72) have similar atomic and ionic radii because of :

Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :

The pollution due to oxides of sulphur get enhanced due to the presence of:
(a) particulate matter
(b) ozone
(c) hydrocarbons
(d) hydrogen peroxide

Choose the most appropriate answer from the options given below:

A 10.0 L flask contains 64 g of oxygen at 27°C. (Assume O₂ gas is behaving ideally). The pressure inside the flask in bar is (Given R = 0.0831 LbarK^-1 mol^-1)

What mass of 95% pure CaCO₃ will be require neutralise 50 mL of 0.5M HCl solution according to the following reaction?
CaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + CO₂(g) + 2H₂O(l) [Calculate upto second place of decimal point]

Which one is not correct mathematical equation for Dalton's Law of partial pressure? Here p = total pressure of gaseous mixture.