Chemistry Question Bank

In the two gaseous reactions (i) and (ii), at 25ºC (i) NO(g) + 1/2O2(g) NO2(g); K1 (ii) 2NO2(g) 2NO(g) + O2 (g), K2 the equilibrium constants K1 and K2 are related as

K1 and K2 are equilibrium constant for reactions (1) and (2) N2(g) + O2(g) 2 NO (g) ....... (1) NO(g) N (g) O (g) .........(2) (a) K K

For CaCO s CaO s CO g ; the equilibrium constant (Kc and Kp) for the thermal decomposition of calcium carbonate is (a) c p CO K CO g ;K p (b) c p CaCO K CaCO s ;K p (c) c p CaO K CaO s ;K p …

Which of the following reactions (s) show(s) heterogeneous equilibria? (a) N g 3H g 2NH g (b) H O l H O g (c) CaCO s CaO s CO g

Equilibrium in a system having more than one phase is called

For the equilibrium 2NOCl g 2NO g Cl g the value of the equilibrium constant, Kc is 3.75 10 x at 1069 K. Calculate the Kp for the reaction at this temperature.

PCl5, PCl3 and Cl2 are at equilibrium at 500 K and having concentration 1.59 M PCl3, 1.59 M Cl2 and 1.41 M PCl5 . Calculate Kc for the reaction. PCl PCl Cl

In an ionic compound A+X– the degree of covalent bonding is greatest when :

The attractive force which holds various constituents (atoms, ions etc.) together in different chemical species is called a

Kossel and Lewis approach was based on the

According to Kossel and Lewis approach, the outer shell can accommodate a maximum of …X… electrons. Here, X refers to

Lewis postulated that atoms achieve the stable octet when they are linked by

Atoms can combine either by transfer of valence electrons from one atom to another or by sharing of valence electrons in order to have an octet in their valence shells. This is called.

Match the following species of Column I with information given in Column II choose the correct option from the codes given below. Column I Column II A. BCl3 1. Odd electron molecules B. SF6 2. Incomplete octet C. NO2 …

According to Lewis and Kossel approach, which of the following molecules has complete octet of the central atom?

The Lewis dot structures can be written by adopting the following steps : I. The total number of electrons required for writing the structure are obtained by adding the valence electrons of the combining atoms. II. Kn…

The important condition(s) for Lewis dot structure of covalent compounds is/are

The number of dots around the Lewis symbol represents:

Lewis introduced simple notations to represent valence electrons in an atom called.

The group valence of the element is generally equal to the

Find out the correct Lewis symbol for the atom carbon among the following options.

Which of the following compound is covalent?

When two atoms share two electron pairs they are said to be joined by a

How many double bonds are present in carbon dioxide molecule?

Which of the following Lewis representation of the molecules NF3, O3 and HNO3 is correct?