
How does intermolecular and intramolecular hydrogen bonding affect melting and boiling points of molecules? ...

1.12 ml of a gas is produced at S.T.P. by the action of 4.12 mg of alcohol, ROH, with methyl magnesium iodide. find the molecular mass of alcohol. ...

If electrons r considered to behave like waves in The Schrodinger Wave equation then The electron waves must encompass the entire nucleus.The the wave will be present everywhere outside the nucleus , enveloping it completely. ...

1.922 g of MeOH was burnt in a constantvolume bomb calorimeter. The temperature of water rose by 4.2oC. If the heat capacity of the calorimeter and its contents is 10.4kJoC1, calculate the molar heat of combustion of MeOH. ...

The hybridization of sulphur in sulphur dioxide is ...

All metabolic processes have +ve Gibbs free energy but they have +ve entropy change.Please justify ...

prove that,the time required for 99.9% completion of a first order reaction is almost ten times that required for half the reaction ...

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The decomposition of N2O5 according to the equation: 2N2O5(g) → 4NO2(g) + O2(g) is a first order reaction. After 30 min. from the start of the decomposition in a closed vessel, the total pressure developed is found to be 28 ...

Of the following molecule the only one which is not an exception to the octet rule is – ...

The maximum possible number of hydrogen bonds, a water molecule can form is ...

1)When burnt in air,a 12.0 g mixture of carbon and sulphur yields a mixture of CO2 and SO2,in which the number of moles of SO2 is half that of CO2.The mass of the carbon the mixture contains is (a)4.08g (b)5.14g (c)8.74g (d)1 ...

The radius of an Xe atom is 1.3X108cm. A 100cm3 container is filled with Xe at a pressure of 1.0atm ans a temp of 273K. calculate the fraction of volume that is occupied by Xe atom?? ...

The critical temperature and pressure of CO2 gas are 304.2K and 72.9atm respectively. What is the radius of CO2 molecule assuming it to behave as vander walls' gas? ...

Vander waal's constant "b: for a gas os 4.2X102 lit mol1 . How close the nuclei of the two molecules come together?? ...

4. A glass vessel weighs 40.1305g when clean dry and evacuated, 138.2410g when filled withwater at 25°C(d=0.9979 g/ml) & 40.2487g when filled with a gas at 740.4 torr and 24.1°C. What is the molecular weight of gas? ...

3. A vessel contains a mixture of 7g of N_2 & 11g of CO_2 at temp 290K. if pressure of the mixture is 1atm, calculate its density. ...

1. One litre water in a bucket is placed in a closed dry air room having dimensions 4*2*1.5 m^3 at 300K. If the vapour pressure of water at 300K is 27.0mm and density of water at 300K is 0.990 g cm^(3), calculate the amount ...

The rate of diffusion of a sample of ozonised oxygen is 0.98 times more than that of pure O2. Find the percentage (by volume) of ozone in the ozonized sample. also tell percentage by weight. ...

Which of the following has pyramidal shape – ...

Hlike atom in an excited state(x) absorbs 2.7 ev photon to excite to higher excited state(y).It emits 6 photons of different energy from this state.Find the atomic number and the quantum number of excited state. ...

Identify the least stable anion: a)Li b)Be c)B d)C ...

The density of a gas at 1.5 atm is 1.52 g/litre. Calculate its r.m.s velocity. ...

2. If chlorine gas is 70 moles percent dissociated at 2000 k and I am pressure to form atomic chlorine, calculate the density of the mixture of gas? ...

A gaseous mixture contains 4 molecules with a velocity of 6 cm {sec ^{  1}}, 5 molecules with a velocity of 2 cm and 10 molecules with a velocity of 3 cm what is the RMS velocity of the gas – ...

Correct option regarding a container 1 mol of a gas in 22.4 litre container at 273 K is ...

Electronegativity of C & O in carbonmonoxide suggests it to be polar. But in reality it is not so. Why? ...

Phosphorous can form PH3 but no PH5 . why??? ...

Find the slope of the curve plotted between P V s T for closed container of volume 2 lit having same moles of gas ...

In PCl5, the bond angles in equatorial & axial planes are ...