Recently Active Physical Chemistry Questions

:: Single option Correct :: 1) A metallic element crystallises into a lattice containing a sequnece of layers of ABABAB.. Any packing of spheres leaves out voids in the lattice. Percentage of Empty Space (by Volume) is - a)52 ...

Calculate Potenial half cell Ag2S (s) +2e =2Ag(s) +S2-(aq) in osln buffered at ph=3 which is also saturated with 0.1M H2S (Aq) ** = denotes equilbm ...

In a reaction : A + 2B \Leftrightarrow 2C,2 moles of A,3 moles of B and 2 moles of C are placed in 2 L flask and the eqb concentration of C is 0.5 mole/L.The eqb constant (K) for the reaction is (a). 0.073 (b). 0.147 (c). 0.0 ...

Grams of potassium dichromate required to oxidize 24.82 g of Fe2+ in FeSO4 to Fe3+,if the reaction is carried out in acidic solution is ___ ...

q-1) each carbon atom is sp3 hybridised in diamond. the no. of tetrahedral voids occupied in diamond are? a)25% b)50% c)75% d)100% q-2)in what mass of water must 25g of CuSO4.5H2O be dissolved to obtain an 8% solution of CuSO ...

1..why strong electrolytes donot hydrolyse in solution ?????[2][2][2][2][2] ...

A catalyst decreases the energy of activation of the reaction : A--->B,ΔH=37.012 Kcal,by 2 %. At 27 C 4 x 10-8% of the product molecules i.e B is able to cross over the potential barrier in absence of catalyst.How many ti ...

Pick out the orbital(s) with maximum number of nodal planes A. 3dxy B. 4dz2 c. 4dxy D. 2px ...

2CH3COO-→C2H6+2CO2 +2e If current effiicency=80%,what vol of gas is produced at 27C and 740 torr if current of 0.5 A is passed for 96.45 min ...

A. PHOTOELECTRIC EFFECT P. INDUCED REACTION B. NUCLEAR FISSION Q.SPONTANEOUS REACTION C. β-DECAY R.EXOGERIC(Q>0)REACTION D. NUCLEAR FUSION S. CHAIN REACTION T. INSTANTANEOUS REACTION ...

q1 Total ionic strength of a solution of 0.5M MgSO4,0.1M AlCl3,0.2M (NH4)2SO4 q2 On cooling 50g of solute gets precipitated from 400g of a 20% solution by weight.What is percentage concentration of remaining solution q3 If ra ...

1)13.44 g cucl2 is dissolved in 1 kg of water. what is the elevation in boiling point?kb=0.52 kg k/mol ans-0.16 2)which of the following statements are correct? a)the coordination no. of each type of ion in cscl is 8. b)metal ...

Q. The decomposition of N2O5 is 1st order. 2N2O5 ---> 4NO2 + O2 is 1st order. If the rate constant is 5.90 x 10-4 s-1, what is the half life of this reaction? will u use t0.5 = 0.693/K or t0.5 = 0.693/2K ...

Two beakers one containing 20ml of a .05M aqueous solution of a non volatile non electrolyte and the other contains 20ml of .03MNaCl solution , are placed side by side in a closed enclosure.what are the volumes in the two bea ...

1 g of a moist sample of KCl And KClO3 was dissolved in water and made up to 250 ml. .25 ml of the solution was treated with SO2 to reduce the chlorate to chloride and excess SO2 was removed by boiling . The total chloride wa ...

Which is Bronsted-Lowry acid as well as Arrhenius acid ? H2 , HCO3- , NH3 or NH2- ? Ans : HCO3- ...

if there are 2 containers A and B A-contains gases c n d B-contains gases c pressure in B is greater than A will th gas d move from A to B?? ...

How many litres of SO2 has to be passed through HClO3 to reduce 16.9 g of it to HCl.. Ans 13.44 ...

Following reaction NH4+ + CN- → HCN + NH3 (in aqueous medium) proceeds in : a) forward direction b) backward direction c) in both sides equally d) can't be predicted Ans: (b) ...

Consider the following reactions in aqueous medium : A : H2CO3 (aq) + HSO4-(aq) → H2SO4(aq) + HCO3-(aq) B : HF(aq) + Cl- (aq) → HCl(aq) + F- (aq) C : HF(aq) + NH3(aq) → NH4+ + F- D : HSO4- + CN- → HCN + SO42- Reaction ...

1) Equimolar quantities of each of the following substances are dissolved in enough water to make 1 L of solution. Arrange the solution so prepared in order of increasing pH. (a) KHSO4 (b) NaHCO3 (c) Na2O (d) HClO4 (e) CH3 NH ...

i have a gross unending doubt with basics in electrode potential!! can i have a big lecture from someone on electrode potential from the exact starting in order to clear my basics as well as doubts!! ...

1.....why will the pH increase if NaOH is added to 10 litres of solution of water????????[2][2][2][2][2][2][2][2][2] edited ...

MnO2 + Pb3O4 + HNO3 ---> HMnO4 + Pb(NO3)2 + H2O Balance this equation I an having a doubt due to fractional charge on Pb on LHS ...

which of following os not ah example of pseudo unimoleculer reactions a)ch3cooc2h5+h2o gives (in presence of h+) ch3cooh+c2h5oh b)same reaction in presence of oh- c)c12h22011+h2o giving c6h12o6 in presence of h+ d)ch3cocl+h2o ...

C2H5ONa is a ___________________ in C2H5OH. a) strong acid b) strong base c) weak acid d) weak base The most important question....... WHY ??? ...

1. The depression in freezing point caused by a 1M NaCl solution is 0.0123°C. What will be the depression in freezing point caused by 1M glucose solution? 2. When HgI2 is mixed with aqueous solution of KI then freezing point ...

1. The depression in freezing point caused by a 1M NaCl solution is 0.0123°C. What will be the depression in freezing point caused by 1M glucose solution? 2. When HgI2 is mixed with aqueous solution of KI then freezing point ...

1..thermodynamic equilibrium constant k is a unitless quantity (T/F) ...

1.why joule thomson effect zero in case of ideal gases????? ...