Chemistry Question Bank

H O l H O vap. In this equation, the double half arrows indicate that

Which of the following is correct for equilibrium state?

Assertion For the reaction, 2NO g O g 2NO Increase in pressure favours the formation of NO2. Reason The reaction is exothermic (AIIMS 2009)

Standard free energy change for an equilibrium is zero, the value of Kp is (HARYANA PMT 2009)

Two moles of each reactant A and B are taken in a reaction flask. They react in the following manner, A(g) B(g) C(g) D(g) At equilibrium, it was found that the concentration of C is triple to that of B. The equili…

p K and p K are the equilibrium constants of the two reactions, given below (AMU 2009) N g H g NH g N g 3H g 2NH g Therefore p K and p K are related by (a) p p K K (b) p p K K (c) p p K 2K (d) p p K K

2HI g H g I g The equilibrium constant of the above reaction is 6.4 at 300 K. If 0.25 mole each of H and 2I are added to the system, the equilibrium constant will be (KCET 2009)

5 moles of SO and 5 moles of O are allowed to react. At equilibrium, it was found that 60% of SO is used up. If the total pressure of the equilibrium mixture is one atmosphere, the partial pressure of is (KCET 2009)

Three moles of PCl , three moles of PCl and two moles of Cl are taken in a closed vessel. If at equilibrium the vessel has 1.5 moles of PCl , the number of moles of PCl present in it is (KCET 2008)

CaCO CaO CO reaction in lime kiln goes to completion because (AFMC 2005)

The number of molecular orbitals formed is equal to the number of combining atomic orbitals. When two atomic orbitals combine, two molecular orbitals are formed one is known as bonding molecular orbital while the othe…

Amongst the following which one will have maximum 'lone pair- lone pair' electron repulsions? (NEET 2022)

Which amongst the following is incorrect statement? (NEET 2022)

The structure and hybridization of Si(CH3)4 is :

The geometry of sulphate ion is (AFMC 2009)

Ionic compounds in the crystalline state consist of orderly three dimensional arrangements of …X… and …Y… held together by coulombic interaction energies. In the above statement X and Y refer to

If I2 is dissolved in aqueous KI, the intense yellow species 3I is formed. The structure of 3I ions is (DUMET 2009)

A covalent molecule AB3 has a pyramidal structure. The number of lone pair and bond pair of electrons in the molecule are respectively (KCET 2009)

What is the dominant intermolecular force or bond that must be overcome in converting liquid CH3OH to a gas? (AIPMT 2009)

Which of the following has the lowest boiling point? (Punjab PMET 2008)

The angular shape of ozone molecule (O3) consists of (CBSE AIPMT 2008)

Which of the following is weakest? (BHU 2008)

Which of the following molecules have same bond order? H2, He2, C2 and O2

Accordingly MO theory (a) O is paramagnetic and bond order is greater than O2. (b) Ois paramagnetic and bond order is less than O2. (c) Ois diamagnetic and bond order is less than O2. (d) Ois diamagnetic and bond orde…

Using MO theory, predict which of the following species has the shortest bond length? (a) O (b) O (c) O (d) O Ans. (d) Sol. As we know, Bond length 1/bond order. In option A, Ohas bond order 2.5 In option B, Ohas bo…