Ncert Solutions Chemistry Class 11th

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.

Identify the incorrect statement from the following.

Given below are two statements:

Statement I:
The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group.

Statement II:
o-nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring.

In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements:

Statement I:
The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group.

Statement II:
o-nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring.

In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following p – V curve represents maximum work done?