Please select a subject first
Advertisements
Advertisements
Why does fluorine not show disporportionation reaction?
Concept: undefined >> undefined
Write redox couples involved in the reactions given.
\[\ce{Cu + Zn^{2+} ->Cu^{2+} + Zn}\]
Concept: undefined >> undefined
Advertisements
Write redox couples involved in the reactions given.
\[\ce{Mg + Fe^{2+} -> Mg^{2+} + Fe}\]
Concept: undefined >> undefined
Write redox couples involved in the reactions given.
\[\ce{Br2 + 2Cl- -> Cl2 + 2Br-}\]
Concept: undefined >> undefined
Write redox couples involved in the reactions given.
\[\ce{Fe + Cd^{2+} -> Cd + Fe^{2+}}\]
Concept: undefined >> undefined
Find out the oxidation number of chlorine in the following compounds and arrange them in increasing order of oxidation number of chlorine.
\[\ce{NaClO4, NaClO3, NaClO, KClO2, Cl2O7, ClO3, Cl2O, NaCl, Cl2 , ClO2}\].
Which oxidation state is not present in any of the above compounds?
Concept: undefined >> undefined
Which of the following hydrides is electron-precise hydride?
Concept: undefined >> undefined
Which of the following statements about hydrogen are correct?
(i) Hydrogen has three isotopes of which protium is the most common.
(ii) Hydrogen never acts as cation in ionic salts.
(iii) Hydrogen ion, \[\ce{H+}\], exists freely in solution.
(iv) Dihydrogen does not act as a reducing agent.
Concept: undefined >> undefined
Which of the following statements is correct?
(i) Elements of group 15 form electron deficient hydrides.
(ii) All elements of group 14 form electron precise hydrides.
(iii) Electron precise hydrides have tetrahedral geometries.
(iv) Electron rich hydrides can act as Lewis acids.
Concept: undefined >> undefined
Explain the following:
Gallium has higher ionisation enthalpy than aluminium.
Concept: undefined >> undefined
Explain the following:
Aluminium forms [AlF6]3– ion but boron does not form [BF6]3– ion.
Concept: undefined >> undefined
Assertion (A): If aluminium atoms replace a few silicon atoms in three-dimensional network of silicon dioxide, the overall structure acquires a negative charge.
Reason (R): Aluminium is trivalent while silicon is tetravalent.
Concept: undefined >> undefined
Account for the following observations:
AlCl3 is a Lewis acid
Concept: undefined >> undefined
Express the following in the scientific notation:
0.0048
Concept: undefined >> undefined
Express the following in the scientific notation:
234,000
Concept: undefined >> undefined
Express the following in the scientific notation:
8008
Concept: undefined >> undefined
Express the following in the scientific notation:
500.0
Concept: undefined >> undefined
Express the following in the scientific notation:
6.0012
Concept: undefined >> undefined
If the speed of light is 3.0 ×108 m s-1, calculate the distance covered by light in 2.00 ns.
Concept: undefined >> undefined
Write the general outer electronic configuration of s- block elements.
Concept: undefined >> undefined
