For the reaction \({ N }_{ 2 }(g)+3{ H }_{ 2 }(g)\rightleftharpoons 2NH_{ 3 }(g),\) the partial pressure of N₂ and H₂ are 0.80 and 0.40 atmosphere respectively at equilibrium. The total pressure of the system is 2.80 atmosphere. What is K_p for the above reaction?

Identify oxidising and reducing agents in the following reaction
\(CH_{ 4 }+20_{ 2 }\longrightarrow CO_{ 2 }+2H_{ 2 }O\)

Explain the correct context in which the following terms are used hydron.

Compare the action of heat on LiNo₃ and NaNo₃

Why is boron used in nuclear reactions?

Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens?

Out of benzene, m–dinitrobenzene and toluene which will undergo nitration most easily and why?

(i) What do you mean by diffusion?
(ii) Ammonia and hydrochloric acid gases are prepared at the two extreme corners in the laboratory. Which gas will reach first to a person in the centre of the laboratory?
(iii) Write down the value points

Predict which atom in each of the following pairs has the greater first ionisation enthalpy and explain your answer.
F and Ne

An element A combines with B. An atom of A contains two electrons in its outermost shell whereas that of B has six electrons in its outermost shell. The electrons are transferred from the atom A to the atom B.
What is the nature of bond between A and B?

The variation of the vapour pressure of different liquids with temperature is shown in the figure below.

At high altitude, atmospheric pressure is low (say 60 mm Hg). At what temperature will liquid D boil?

For the reaction
2A(g)+B(g)→2D(g)Δ U^θ=−10.5 kJ and Δ S^θ=–44.1 JK⁻¹.
Calculate Δ Gθ for the reaction, and predict whether the reaction may occur spontaneously.

Predict the products of electrolysis in each of the following 
A dilute solution of H₂SO₄ with platinum electrodes

Lithium oxide is used to remove water from air according to the reaction \({ Li }_{ 2 }O(s)+{ H }_{ 2 }O(g)\longrightarrow 2LiOH(s)\). If 72 Kg of water is to be removed and 35 kg of Li₂O is available, then (i) which reactant is limiting?
(b) how many kg of excess reactant is left?

According to de-Broglie, matter should exhibit dual behaviour, that is both particle and wave like properties.However, a cricket ball of mass 100g does not move like a wave when it is thrown by a bowler at a speed of 100km/h.Calculate the wavelength of the ball and explain why it does not show wave nature?

Which colour is imparted to flame by sodium ?

(a) What do you understand by Homolytic fission?
(b) What are carbanions? Give an example.