Chemistry Test - 25

Barium gives grassy green colour in flame.

Sulphur burns with a blue flame concomitant with formation of sulphur dioxide, which is gaseous at room temperature.

In this complex copper is in +2 oxidation state. Cu²⁺ has electronic configuration is [Ar] 3d⁹ 4s⁰. So in this compound copper undergo dsp² hybridization to give square planar structure. Since Cu²⁺ has only one unpaired electron so using, √[n(n+2)] the dipole moment comes out to be 1.73 BM.

The configuration for Mn is [Ar] 4s²3d⁵. In the excited state, the distribution of electrons in d orbitals is shown as t₂g³eg².

Medicines are more effective in colloidal state because colloids have a larger surface area. Thus, they get easily assimilated, absorbed and digested.

Vanadium (III) oxide acts as a strong reducing agent in many type of reactions due to strong reducing nature of V³⁺ ions.

Liquids which decompose below their normal boiling point can be distilled at a lower temperature by decreasing the pressure.

1 mole of phenol (mol. mass = 94) requires 3 moles of Br₂ (mol. mass = 160)

Pentacetyl formation of glucose indicates that the latter contain 5–OH groups, indicating the open chain structure of glucose.

Chlorine is only a slightly stronger oxidising agent than bromine. Therefore, chlorine cannot oxidise bromine to +7 oxidation state. So, BrCl₇ cannot be formed.