Identify the correct order of the size of the following:
Ca2+ < K+<Ar < S2- < Cl-
Ca2+ < K+ < Ar < Cl-< S2-
Ar < Ca2+ <K+ <Cl- <S2-
Ar < Ca2+ <K+ <Cl- <S2-
In which of the following pairs, the two species are isostructural?
SF4 and XeF4
SO32- and NO3-
BF3 and NF3
BF3 and NF3
The correct order of increasing thermal stability of K2CO3, MgCO3, CaCO3 and BeCO3 is:
BeCO3 < MgCO3 < K2CO3 <CaCO3
BeCO3 < MgCO3 < CaCO3 <K2CO3
MgCO3 < BeCO3 < CaCO3 < K2CO3
MgCO3 < BeCO3 < CaCO3 < K2CO3
B.
BeCO3 < MgCO3 < CaCO3 <K2CO3
Thermal stability of carbonates increases in a group as we move from top to bottom and decreases in a period as we move from left to right. so, the correct order of thermal stability of given carbonates is:
BeCO3 < MgCO3 < CaCO3 < K2CO3
Be, Mg and Ca present in second group and K present in the first group.
In which of the following the hydration energy is higher than the lattice energy?
BaSO4
MgSO4
RaSO4
RaSO4
Which of the following will give a pair of enantiomorphs?
(en = NH2CH2CH2NH2)
[Co(NH3)Cl2]NO2
[Cr(NH3)6]Co(CN)6]
[Co(en)2Cl2]Cl
[Co(en)2Cl2]Cl
The Number of moles of KMnO4 that will be needed to react with one mole of sulphite ion in acidic solution is:
3/5
4/5
2/5
1
Identify the incorrect statement among the following:
There is a decrease in the radii of the atoms or ions as one proceeds from La to Lu.
Lanthanoid contraction is the accumulation of successive shrinkages
As a result of lanthanoid contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of elements
As a result of lanthanoid contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of elements
If there is no rotation of plane polarises light by a compound in a specific solvent, thought to by chiral, it may mean that:
the compound is certainly a chiral
the compound is certainly meso
there is no compound in the solvent
there is no compound in the solvent
Concentrated aqueous sulphuric acid is 98% H2SO4by mass and has a density of 1.80 g mL-1.Volume of acid required to make one litre of 0.1 M H2SO4 solution is:
11.10 mL
16.65 mL
22.20 mL
22.20 mL