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
C.
hydration energies of cations
c)
Solubilities of carbonates decrease down the group because their lattice energy remains almost constant while hydration energy decreases sharply on moving downwards.
Thus, the difference of hydrogen energy and lattice energy decreases and hence, solubility decreases.
The least energetic conformation of cyclohexane is:
Boat form
Half chair form
Chair form
Twisted form
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.