Recently Active Physical Chemistry Questions

Which is a soluble base in water? a. Fe(OH)3 b. Cu(OH)2 c. Zn(OH)2 d. NaOH ...

PLease give the solutions and pl don't use equivalent concept as these questions are for school. ...

An electron, a proton and an alpha particle have kinetic energies of 16E,4E and E respectively. What is the qualitative order of their de Broglie wavelengths ? a)Ie>Ip=Ia b)Ip=Ia>Ie c)Ip>Ie>Ia d)Ia<Ie>>Ip ...

which electronic level would allow the hydrogen atom to absorb a photon but not emit one ? a)3s b)2p c)2s d)1s ...

The value of the magnetic moment of a particular ion is 2.83 BM. The ion is a)Fe2+ b)Ni2+ c)Mn2+ d)Co3+ ...

In PCl5 the bond angles in equatorial and axial planes are a)60° and 120° b)120° and 90° c)120° and 60° d)120° and 180° what does "equatorial and axial planes" mean here ? ...

pKb of NH3 is 4.74. The pH when 100ml of 0.01 M NH3 solution is 50% neutralised by 0.01 M HCL is plzz explain ...

pKa1, pKa2 and pKa3 of H3PO4 are x,y,z respectively . pH 0.1 M Na2HPO4 solution is ...

When a certain metal was irradiated with light of frequency 3.2 x 1016 Hz. Photoelectrons emitted had twice the kinetic energy as did photoelectrons emitted when the same metal was irradiated with light of frequency 2.0 x 101 ...

How much ice will separate if a solution containing 25g of ethylene glycol[C2How much ice will separate if a solution containing 25g of ethylene glycol[C2H4(OH)2 in 100g of water is cooled to -10°C? Kf for water is 1.86 - Af ...

Supposing the energy of fourth shell for hydrogen atom is – 50 a.u. (arbitrary unit). What would be its ionization potential a)50 b)800 c)15.4 d)20.8 what is ionization potential? ...

654 g of zinc reacts with dil. HCl in an open vessel at 37oC liberating hydrogen. Calculate the work done by the hydrogen gas in Joules. What would be the work done by the same gas if the same reaction were carried in a seale ...

Which of the following are non-polar species ? a)AsO3- b) SO32- c)ClO3- d) NO3- ...

sir can u please explain how to derive the amount of energy associated in the nth shell of bohr's atomic model ...

Avagadro Number is the reciprocal of which number? (a)Mass Number (b)Atomic Number (c)Mass of a proton (d)Mass of an electron ...

A certain reaction A + B → Product is first-order w.r.t. each reactant with k = 5.0 x 10-3 M-1s-1. Calculate the concentration of A remaining after 100 s if the initial concentration of A was 0.1 M and that of B was 6.0 M. ...

The standard reduction potential of a calomel half cell is 0.28 V at 25°The standard reduction potential of a calomel half cell is 0.28 V at 25°C. Calculate half cell potential when 0.1N KCL soln is used ...

The ionization potentials of atoms A and B are 400 and 300 kcal/mol respectively. The electron affinities of these atoms are 80 and 85 kcal/mol respectively. Which of the atoms is more electronegative? ...

If the radius of the first Bohr orbit is 'a', then what is the De-broglie wavelength of the electron in the 3rd orbit? ...

Calculate the equilibrium concentration ratio of C to A if 2.0 ml of each of A and B were allowed to come to equilibrium at 300 K. A + B *Image* C + D dG = 460 cal ...

what is an electron cloud ...

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Arrange these according to the strengths of the σ-bonds they form along with proper reasons: s-s , s-p, p-p overlap of At. orbitals. ...

Chlorine is quite electronegative. So, why is hydrogen bond not present in HCl? Thanx... ...

Saturated CaC2O4(aq) is prepared and 250 ml of solution is withdrawn and titrated with 6.3 ml of 0.00102 M KMnO4(aq). What is the value of Ksp for CaC2O4? ...

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2.5g of BaO and CaO when heated with excess H2 SO4 , produced 4.713g of mixed sulphates. Find the percentage of BaO present in mixture ...

The Mn3O4 formed on strong heating of a sample of MnSO4.4H2O was dissolved in 100cc of 0.1(N) FeSO4 containing H2SO4. The resulting solution reacted completely with 50cc of KMnO4 solution. 25cc of this KMnO4 solution requires ...

The type of bond present in {N_2}{O_5} are – ...

The compound which contains both covalent and co – ordinate bond is – ...