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Give correct reason for the following:
→- BF3 has a zero dipole moment although the $\text{B}-\text{F}$ bonds are polar.
- All carbon to oxygen bonds in $\text{CO}^{2-}_3$ are equivalent.
Which method can be used to find out strength of reductant/ oxidant in a solution?
What would be IUPAC names and symbols for elements with atomic numbers 122, 127, 135, 149 and 150?
What do you understand by bond pairs and lone pairs of electrons? Illustrate by giving one example of each type.
Find the value of n in:
$4\text{MnO}^-_4+8\text{H}^++\text{ne}^-\xrightarrow{\ \ \ \ \ \ }\text{Mn}^{2+}+4\text{H}_2\text{O}$
→$4\text{MnO}^-_4+8\text{H}^++\text{ne}^-\xrightarrow{\ \ \ \ \ \ }\text{Mn}^{2+}+4\text{H}_2\text{O}$
What do you understand by stoichiometric coefficients in a chemical equation?
In a container of 5 L volume, in a vessel at 1250 K temperature following reaction takes place :
$
CO(g)+H_2 O(g) \rightleftharpoons CO_2(g)+H_2(g)
$
Initially one-one mole of CO and $H _2 O$ is taken and at equilibrium 0.4 mole $H _2 O$ remains then calculate equilibrium constant.
→$
CO(g)+H_2 O(g) \rightleftharpoons CO_2(g)+H_2(g)
$
Initially one-one mole of CO and $H _2 O$ is taken and at equilibrium 0.4 mole $H _2 O$ remains then calculate equilibrium constant.
Why does the first ionisation energy increase as we go from left to right along a given period of periodic table? Which group has highest ionisation enthalpy?
Explain why?
→- Reaction of $\text{FeSO}_4+\text{Cu}\xrightarrow{ \ \ \ \ \ }\text{CuSO}_4\text{(aq)}+\text{Fe}$ does not occur.
- Zinc can displace Cu from aqueous CuSo4 solution but Ag cannot.
- Solution of AgNO3 turns blue when Cu rod dipped in it.
- Balance $\text{MnO}_4^-+\text{Fe}^{2+}\xrightarrow{ \ \ \ \ \ \ \ \ }\text{Fe}^{3+}+\text{Mn}^{2+}$ in acidic medium by ion electron method.
- Given the standard electrode potentials:
$\frac{\text{K}_+}{\text{K}}=-2.93\text{V},$
$\frac{\text{Ag}^+}{\text{Ag}}=+0.80\text{V},$
$\frac{\text{Mg}^{2+}}{\text{Mg}}=-2.37\text{V}$
Arrange these metals in order of increasing reducing power.