Ncert Solutions Chemistry Class 11th
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This is a short answer type question as classified in NCERT Exemplar
Because of hydrogen bonding HF is liquid whereas HCl is gas as there is lack of hydrogen bonding in HCl.
Upvote 
In which of the following reactions, the equilibrium remains unaffected on addition of small amount of argon at constant volume?
(i) H2 (g) + I2 (g) ⇌ 2HI (g)
(ii) PCl5 (g) ⇌ PCl3 (g) + Cl2 (g)
(iii) N2 (g) + 3H2 (g) ⇌2NH3 (g)
(iv) The equilibrium will remain unaffected in all the three cases.
In which of the following reactions, the equilibrium remains unaffected on addition of small amount of argon at constant volume?
(i) H2 (g) + I2 (g) ⇌ 2HI (g)
(ii) PCl5 (g) ⇌ PCl3 (g) + Cl2 (g)
(iii) N2 (g) + 3H2 (g) ⇌2NH3 (g)
(iv) The equilibrium will remain unaffected in all the three cases.
This is a Multiple Choice Questions as classified in NCERT Exemplar
Ans: option (iv)
Since in all the given reaction, the volume is to be kept constant and an inert gas argon is added which will do not take part in reaction. So, the equilibrium will remain unaffected in all the given cases.
Upvote Dihydrogen reacts with dioxygen (O2) to form water. Write the name and formula of the product when the isotope of hydrogen which has one proton and one neutron in its nucleus is treated with oxygen. Will the reactivity of both the isotopes be the same towards oxygen? Justify your answer.
Dihydrogen reacts with dioxygen (O2) to form water. Write the name and formula of the product when the isotope of hydrogen which has one proton and one neutron in its nucleus is treated with oxygen. Will the reactivity of both the isotopes be the same towards oxygen? Justify your answer.
This is a short answer type question as classified in NCERT Exemplar
Dihydrogen reacts with dioxygen to form water. The reaction is highly exothermic.
H2 (g) + O2 (g) → H2O (l)
? H = -285.9KJmol-1
The isotope of hydrogen which has one proton and one neutron is deuterium. When it reacts with O2 it forms
Upvote At 500 K, equilibrium constant, Kc , for the following reaction is 5.
(g) + (g) ⇌ HI (g)
What would be the equilibrium constant Kc for the reaction
2HI(g) ⇌ H2 (g) + I2 (g)
(i) 04
(ii) 4
(iii) 25
(iv) 5
At 500 K, equilibrium constant, Kc , for the following reaction is 5.
(g) + (g) ⇌ HI (g)
What would be the equilibrium constant Kc for the reaction
2HI(g) ⇌ H2 (g) + I2 (g)
(i) 04
(ii) 4
(iii) 25
(iv) 5
This is a Multiple Choice Questions as classified in NCERT Exemplar
Ans: option (i)
If the equation is multiplied by 2, the equilibrium constant for the new equation is the square of K it means we must do the square of 5 that is 25. Then and on reversing the reaction the value of the equilibrium
Upvote Melting point, enthalpy of vaporization and viscosity data of H2O and D2O is given below:
On the basis of this data explain in which of these liquids intermolecular forces are stronger?
Melting point, enthalpy of vaporization and viscosity data of H2O and D2O is given below:
On the basis of this data explain in which of these liquids intermolecular forces are stronger?
This is a short answer type question as classified in NCERT Exemplar
D2O has greater intermolecular force of attraction. This is because D2O exhibits higher values for melting point, enthalpy of vaporization, and viscosity compared to H2O, indicating stronger intermolecular interactions needed to ove
Upvote What will be the correct order of vapour pressure of water, acetone and ether at 30°C. Given that among these compounds, water has maximum boiling point and ether has minimum boiling point?
(i) Water < ether < acetone
(ii) Water < acetone < ether
(iii) Ether < acetone < water
(iv) Acetone < ether < water
What will be the correct order of vapour pressure of water, acetone and ether at 30°C. Given that among these compounds, water has maximum boiling point and ether has minimum boiling point?
(i) Water < ether < acetone
(ii) Water < acetone < ether
(iii) Ether < acetone < water
(iv) Acetone < ether < water
This is a Multiple Choice Questions as classified in NCERT Exemplar
Ans: option (ii)
Greater the boiling point, lower will be the vapour pressure.
Upvote On increasing the pressure, in which direction will the gas phase reaction proceed to re-establish equilibrium, is predicted by applying the Le Chatelier’s principle. Consider the reaction.
N2 (g) + 3H2 (g) ⇌2NH3 (g)
Which of the following is correct, if the total pressure at which the equilibrium is established, is increased without changing the temperature?
(i) K will remain same
(ii) K will decrease
(iii) K will increase
(iv) K will increase initially and decrease when pressure is very high
On increasing the pressure, in which direction will the gas phase reaction proceed to re-establish equilibrium, is predicted by applying the Le Chatelier’s principle. Consider the reaction.
N2 (g) + 3H2 (g) ⇌2NH3 (g)
Which of the following is correct, if the total pressure at which the equilibrium is established, is increased without changing the temperature?
(i) K will remain same
(ii) K will decrease
(iii) K will increase
(iv) K will increase initially and decrease when pressure is very high
This is a Multiple Choice Questions as classified in NCERT Exemplar
Ans: Option(i)
The given reaction is :-
N2 (g) + 3H2 (g) ?2NH3 (g)
A/C to vart Hoff's eqn,
=
K is dependent on temperature. As temperature remains constant at equilibrium, so K will remain constant in the given conditio
Upvote (i) Draw the gas phase and solid phase structure of H2O2.
(ii) H2O2 is a better oxidising agent than water. Explain.
(i) Draw the gas phase and solid phase structure of H2O2.
(ii) H2O2 is a better oxidising agent than water. Explain.
This is a short answer type question as classified in NCERT Exemplar
In H2O2 oxygen is in -1 oxidation state which has tendency to become -2 that is why it is a better oxidising agent than water.
Upvote Which of the following options will be correct for the stage of half completion of the reaction A ⇌ B.
(i) ∆Gᶱ = 0
(ii) ∆Gᶱ> 0
(iii) ∆Gᶱ< 0
(iv) ∆Gᶱ= –RT ln2
Which of the following options will be correct for the stage of half completion of the reaction A ⇌ B.
(i) ∆Gᶱ = 0
(ii) ∆Gᶱ> 0
(iii) ∆Gᶱ< 0
(iv) ∆Gᶱ= –RT ln2
This is a Multiple Choice Questions as classified in NCERT Exemplar
Ans: Option(i)
When the reaction is half completed, [A] = [B].
Thus, [B][A]=1
?G0=−RTInK=−RTIn(1)=0
Upvote This is a short answer type question as classified in NCERT Exemplar
2H2O2 → 2H2O+O2
5 volume H2O2 means IL of H2O2 will give 5L of O2 at STP.
On the basis of the equation it is clear that 22.7 L of O2 is produced by 68 g of H2O2.
5L of O2 is produced by = = = g of H2O2=14.9g
i.e. 15 g H2O2 dis
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