Recently Active Chemistry Questions

H-like 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. ...

Which follows octet rule? ...

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 carbon-monoxide suggests it to be polar. But in reality it is not so. Why? ...

The major product obtained in the reaction *Image* ...

Consider the first ionization energies of the elements whose electronic configurations corresponds to the following.Which of these is the highest ? (i) [He]2s22p3 (ii) [He]2s22p4 (iii) [Ne]3s23p1 (iv)[Ar]3d104s1 ...

1) What is Dielectric Constant? 2) How is solubility of a substance measured? 3) What is lattice energy? ...

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 ...

Arrange these compounds in order of increasing {S_N}2 reaction rate *Image* ...

which of the following is the correct order of ionization energy 1. Be+>Be 2. Be>Be+ 3. C>Be 4. B>Be ...

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

Addition of B{r_2} on C{H_2} = C{H_2} in presence of NaCl (aq) gives ...

An atom of one element A has four elements in its outermost shell, and that of B has six electrons in the outermost shell. The formula of the compound formed by these two will be ...

The first ionization potential of Na, Mg, Al, Si are in the order: ...

please give an example of rearrange reaction. ...

What is the geometry of XeOF3 ...

Arrange the following in order of increasing diople moment (I) Toluene (II) m-dichloro-benzene (III) o-dichlorobenzene (IV) p -dichlorobenzene ...

Arrange the following resonating structures of formic acid in order of decreasing stability mathop {mathop {H - mathop {mathop Climits^{||,} }limits^OÂ - OH}limits_{} }limits_{{ m{I}},,,}Â leftrightarrow mathop {mathop {H - m ...

Leaving tendency of the following in increasing order is : *Image* ...

rank the alkyl halides in decreasing order of reactivity in the Williamson reaction 1.( CH3)3CCH2Br 2. ClCH2CH=CH2 3.ClCH2CH2CH3 4.BrCH2CH2CH3 ...

the compound H3N:BF3 is isoelectronic with A)B2H6 B)C2H6 C)C5H12 D)C3H6 . PLEASE EXPLAIN. ...

Which of the following is most covalent – ...

25 mL of a 0.107 M H3PO4 was titrated with a 0.115 M solution of a NaOH solution to the end point identified by the colour change of the indicator,bromocrescol green.This required 23.1mL.The titration was repeated using pheno ...

if any nucleophille is given how can we say that it is weak or strong nucleophille? ...

what is the IUPAC name of Na3[Co(NO2)6 ??? ...