Consider the following reversible reaction at equilibrium:
The maximum decomposition of H2O(g) will occur by which of the following change in conditions.
Increasing temperature and decreasing pressure
Decrease temperature and increasing pressure
Increasing both temperature and pressure
Increasing temperature at constant pressure
Presence of phosphoric acid or glycerine or acetanilide retards the decomposition of H2O2 .This is an example of:
Positive catalysis.
Negative catalysis.
Auto catalysis.
Induced catalysis.
Photochemical smog is due to the presence of:
Oxides of sulphur.
Oxides of nitrogen.
Oxides of carbon.
Chlorofluoro carbons.
For binary hydrides of formula M x n the value of n can be fractional for:
salt like hydrides
interstitial hydrides
covalent hydrides
polymeric hydrides
The solubility of carbonates decreases below the magnesium group due to decrease in:
Lattice energies of solids
inter-ionic attraction
hydration energies of cations
entropy of solution formation
The least energetic conformation of cyclohexane is:
Boat form
Half chair form
Chair form
Twisted form
Which of the following is the electron deficient molecule?
PH3
SiH4
D.
In each B-atom used sp3 -hybrid orbitals for bonding. Out of four sp3 -hybrid orbitals, one orbital is empty. Here, one half-filled orbital of other B-atom overlaps with one empty orbital of other B-atom and half-filled orbitals of hydrogen atom resulting in 3 centred two electron bridge bonds.
Thus, these bonds are electron deficient.
The correct statement(s) about the compound is/are
The total number of stereoisomes possible for X is 6
The total number of diastereomers possible for X is 3
If the stereo chemistry about the double bond is X is trans, the number of enantiomers
If the stereo chemistry about the double bond in x is, the numberof enantiomers possible to X is 3.