Ncert Solutions Chemistry Class 11th

The internal energy change (in J) when 90 g of water undergoes complete evaporation at 100°C is 
(Given: ΔH_vap for water at 373K = 41 kJ/mol, R = 8.314 JK?¹mol?¹)

Which one of the following graphs is not correct for ideal gas? 

While titration dilute HCl solution with aqueous NaOH, which of the following will not be required?

The statement that is not true about ozone is:

In Carius method of estimation of halogen, 0.172 g of an organic compound showed presence of 0.08 g of bromine. Which of these is the correct structure of the compound?

On heating compound (A) gives a gas (B) which is a constituent of air. This gas when treated with H? in the presence of a catalyst gives another gas (C) which is basic in nature. (A) should not be:

For the following assertion and reason, the correct option is
Assertion(A): When Cu(II) and sulphide ions are mixed they react together extremely quickly to give a solid
Reason(R): The equilibrium constant of Cu²?(aq) + S²?(aq) ? CuS(s) is high because the solubility product is low

Consider the Assertion and Reason given below.
Assertion (A): Ethene polymerized in the presence of Ziegler Natta Catalyst at high temperature and pressure is used to make buckets and dustbins.
Reason (R): High density polymers are closely packed and are chemically inert.
Choose the correct answer from the following:

Consider the following reactions, which of these reaction(s) will not produce Saytzeff product?
(a) (CH?)?CCH(OH)CH? --(cons. H?SO?)-->
(b) (CH?)?CHCH(Br)CH? --(cons. KOH)-->
(c) (CH?)?CHCH(Br)CH? --((CH?)?CO?K?)-->
(d) (CH?)?C(Br)-CH?-CHO --(Δ)-->
Which of these reaction(s) will not produce Saytzeff product?

For a reaction X + Y = 2Z, 1.0 mol of X, 1.5 mol of Y and 0.5 mol of Z were taken in a 1 L vessel and allowed to react. At equilibrium, the concentration of Z was 1.0 mol L⁻¹. The equilibrium constant of the reaction is x/15. The value of x is