Cobalt(III) chloride forms several octahedral complexes with ammonia. which of the following will not give test of chloride ions with silver nitrate at 25⁰C
Options
(a) CoCl₃.4NH₃ (b) CoCl₃.5NH₃ (c) CoCl₃.6NH₃ (d) CoCl₃.3NH₃
The angular momentum of electron in ‘d’ orbital is equal to
Options
(a) √2 h (b) 2√3 h (c) 0h (d) √6 h
Correct Answer:
√6 h
Explanation:
No explanation available. Be the […]
Because of lanthanoid contraction,which of the following pairs of elements have nearly same atomic radii?(Numbers in the parenthesis are atomic numbers)
Options
(a) Zr(40)andNb(41) (b) Zr(40) and Hf(72) (c) Zr(40) and Ta(73) (d) […]
Which of the following processes does not involve oxidation of iron
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(a) Decolourization of blue CuSO₄ solution by iron (b) Formation of Fe(CO)₅ from Fe (c) Lineration of H₂ from steam by […]
The number of d-electrons in Fe²⁺(Z=26) is not equal to the number of electrons in which one of the following
Options
(a) p-electrons in Cl(Z=17) (b) d-electrons in Fe(Z=26) (c) p-electrons in Ne(Z=10) […]
Nitrogen dioxide and sulphur dioxide have some properties in common.Which property is shown by one of these compounds, but not by the other
Options
(a) is a reducing agent (b) is soluble in […]
‘Metals are usually not found as nitrates in their ores”. Out of the following two (i) and (ii) reasons which is true for the above observation.(i)Metal nitrates are highly unstable.(ii)Metal nitrates are highly soluble in […]
When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected.The order of the reaction is
Options
(a) First (b) Second (c) More than zero but less […]
The activation energy of a reaction can be determined from the slope of which of the following graphs
Options
(a) lnK/T vs.T (b) ln K vs.1/T (c) T/ln K vs.1/T (d) ln K […]
A device that converts energy of combustion of fules like hydrogen and methane,directly into electrical energy is known as:
Options
(a) Electrolytic cell (b) Dynamo (c) Ni-Cd cell (d) Fuel Cell
Correct Answer:
Fuel […]
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