Recently Active Physical Chemistry Questions

mole concept 1.who started symbolic representation of elements which we use today a) dalton b) berzelius ...

BKS FR CHEM PRACTICE ONLY QUESTIONS I HVE NCERT ALREADY AND NOT MUCH QUE IN IT FOR COMPTETIONS ...

bks fr chem org havig much explaination of concepts ...

In the scheme given below, the total number of intramolecular aldol condensation products formed from 'Y' is - *Image* Majority of the coachings have said the answer to be 1 except AAKASH . In the below figure this is what AA ...

If wavelength of photon is 2.2 * 10^{-11} m, h = 6.6 * 10^{-34} J-sec, then momentum of photon is ...

Hey guys,pls solve this The time for half life period of a certain reaction A®Products is 1 hour. When the initial concentration of the reactant ‘A’, is 2.0 mol L –1 , how much time does it take for its concentration t ...

This question was asked in JEE 2010. *Image* There has been a controversy regarding the solutions . Some of the institutes say the correct answer to be ( D ) and some (C,D) .What do you guys think ? They have given no other d ...

which of the following statements is correct?? 1.BCl3 nd AlCl3 are both lewis acid but BCl3 is stronger 2.BCl3 nd AlCl3 are both lewis acid but AlCl3 is stronger 3.BCl3 nd AlCl3 are equally strong lewis acid 4.none of these ...

(1)A certain gas is hexamerised 2 a small extent.If initially 1 mole gas is taken the ratio \frac{PV}{RT} will b equal to (A) 1-\frac{5K_{c}}{V^{5}} (B) \frac{5K_{c}}{V^{5}} (C) 1-\frac{5K^{2}_{c}}{V^{5}} (D) 1-\frac{4K^{2}_{ ...

Ques.) 2 moles of PCl5 are taken in a closed vessel. At equilibrium the vessel contains 2.5 moles. The degree of dissociation of PCl5 is 1. 0.25 2. 0.5 3. 0.4 4. 0.2 ...

When C2H5OH and CH3COOH are mixed in equivalent, equilibrium is reached when 2/3 of acid and alcohol are used. How much easter will be present when 2 moles of acid were to react with 2 moles of alcohol? 1. 1.33 mole 2. 1 mole ...

Densities of O2 and H2 is 16 : 1. The ratio of their is Vrms is ??? ...

The set representing the correct order of ionic radius is A) Li+1 > Be+2 > Na+1 > Mg+2 B) Na+1 > Li+1 > Mg+2 > Be+2 C) Li+1 > Na+1 > Mg+2 > Be+2 D) Mg+2 > Be+2 > Li+1 > Na+1 so Aieee 2009 g ...

*Image* ...

wat is the O N of 1) Cr in CrO5 2)S in H2SO5 why is with normal way of finding ON the ans is not coming ...

the depression in freezing point (for the same amount of each) is: acetic acid<trichloroacetic acid<trifluoroacetic acid...explain NCERT Class XII part 1 pg. 61 q)2.31 ...

Eq constant for reaction [Ag(CN)2]- ≈ Ag+ +2CN- is 4 x 10-19 calulate silver ion conc in a soln which is originally 0.1M in KCN and 0.03 M in AgNO3 ...

friends weak in chemistry help required : tell me the basic concept of titration and how can we use different indicators in different titration ,also tell me about titration curve. ...

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% b)48% c)50% d)74% Its clea ...

Find the Bond angle, hybridisation and shape of (1)SF4 (2)XeOF4 (3)ClF3 (4)NH4+ ...

what is the effect of adding inert gas at constant pressure to a system? ...

1)A graph is plotted between PVm on y-axis and P on x-axis. The intercept is (Vm is molar volume). a)R b)R+a/b c)RT d)RT-b/a 2) a)A ring shaped tube contains two ideal gases with molecular weights 32 and 28. Both these gases ...

Q1 Solublity order Beso4,MgSO4,CaSO4,SrSO4 Q2 2nd ionisation enthalpy Cr,V,T,Mn Q3 *Image* ...

is there any shortcut to determine whether a species is paramagnetic or dimagnetic without actually writing the electronic configuration? ...

state true false: 1)H=G+TS {where symbol have their usual meanings} 2)CuCl2 reacts with H2S to form a mettalic sulphide!!! 3)pka+ pkb=pkw at all temperatures ...

1)Nitrogen monoxide, NO, reacts with hydrogen, H2, according to the following equation: 2 NO (g) + 2 H2 (g) → N2 (g) + 2 H2O (g) If the mechanism for this reaction were, 2NO(g) + H2(g) N2(g) + H2O2(g) (fast) H2O2(g) + H2(g) ...

A container has oxygen and hydrogen. Some weight of gases escape. Same weight of methane as that of escaped gases is added to the container so that the total pressure of the mixture remains same. Then what percent of the esca ...

Vapour Pressure of 0.01molal sol.n of a weak base BOH in water at 200C is 17.536mmHg. Calculate "Kb" for the base, given that Aqueous Tension at 200C is 17.540mmHg. (Also assume the base's molarity & molality to be the same.) ...

S1 : For the reaction : O3 \Leftrightarrow O2 + O O + O3 \rightarrow 2O2 (slow) --------- 2O3 \Leftrightarrow 3O2 The molecularity of first step is 1 and that of second step is 2. S2 : O(g) is an intermediate and rate of reac ...

A hypothetical reaction, 2X + Y2 ------> 2XY X + X \Leftrightarrow X2 (fast) X2 + Y2 \Leftrightarrow 2XY (slow) then the order of the reaction is A. 1 B. 2 C. 3 D. undefined ...