When I2 is passed through KCl , KF and KBr solutions :
Cl2 and Br2 are evolved
Cl2 is evolved
Cl2 , Br2 and F2 are evolved
none of the above
Assertion : Sb2S3 is not soluble in yellow ammonium sulphide.
Reason : The common ion effect due to S2- ions reduces the solubility of Sb2S3.
If both assertion and reason are true and reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true, but reason is false.
Both assertion and reason are false statements.
Assertion : Reaction of SO2 and H2S in the presence of Fe2O3 catalyst gives elemental sulphur.
Reason : SO2 is a reducing agent.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
The true statement for the acids of phosphorus, H3PO2, H3PO3 and H3PO4 is
the order of their acidity is H3PO4 > H3PO3 > H3PO2
all of them are reducing in nature
all of them are tribasic acids
the geometry of phosphorus is tetrahedral in all the three
The correct order of solubility in water for He, Ne, Ar, Kr, Xe is :
He > Ne > Ar > Kr > Xe
Xe > Kr > Ar > Ne > He
Ne > Ar > Kr > He > Xe
Ar > Ne > He > Kr > Xe
For electron affinity of halogens which of the following is correct?
Br > F
F > Cl
Br > Cl
F > I
D.
F > I
The low value of electron affinity of fluorine is probably due to small size of fluorine atom, i.e. electron density is high which hinders the addition of an extra electron.
F | Cl | Br | I | |
Electron affinity | -3.6 | -3.8 | -3.5 | -3.2 |
Which of the following does not have valence electron in 3d-subshell ?
Fe (III)
Cr (I)
Mn (II)
P (0)
At higher temperature, iodoform reaction is given by
CH3CO2CH3
CH3CO2C2H5
C6H5CO2CH3
CH3CO2C6H5