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1.sheilding & de-sheilding 2.magnetic anisotropy 3.hydrogen bonding
What is the effect of more electronegative atom on the strength of ionic bond: (1) Decreases (2) Increase (3) Decreases slowly (4) Remains the same Ans: Increase
Electron enters the sub-shell for which (n+l) value is minimum. This is enunciated as: (1) Hund's rule (2) Aufbau principle (3) Heisenberg uncertainty principle (4) P
If you have 250 mL of 2 M sodium sulfate diluted to make 0.500 M of sodium sulfate, how would you figure out the volume?
The transition metal complexes are known to be paramagnetic in character. CFT helps us to understand the magnetic properties in terms of magnetic susceptibility measurements. The m
From the following which group of elements easily forms cation: (1) F, CL, Br (2) Li, Na, K (3) O, S, Se, (4)
Paired Comparison (Preference) Test In this test the assessor is presented with two coded products and asked to indicate whether there is a preference between them. The test
Which one of the following is not the characteristic of Planck's quantum theory of radiation: (1)The energy is not absorbed or emitted in whole number or multiple of quantum
A) Explain the purposes of equalization basins, grit chambers, primary sedimentation tanks, and waste stabilization ponds in wastewater treatment. B) Would you consider a biolog
A 4.00-g sample of iodine was reacted completely with excess bromine. The mass of the compound formed was 11.56-g. Determine the empirical formula.
Colloids are classified as two types which are the lyophilic / reversible and lyophobic / irreversible. If water is the dispersion medium, then the term used are hydrophilic and hydrophobic.Lyophilic colloids: A colloidal system which may be constructed readily by simple warming or shaking the substance in a suitable solvent is called as lyophilic colloid. Substances that form lyophilic colloids involves gelatin, starch, and rubber, proteins, gum. Lyophilic colloids are also named as reversible colloids as on evaporating the dispersion medium such as water, the substance or the residue may be again reconverted into colloidal state simply by addition of the liquid i.e. water. These solutions are reasonably stable and usually cannot be easily precipitated.Lyophobic colloids: colloids constructed with difficulty are termed as lyophobic colloids. These colloids are constructed by substances such as As2S3 , Fe(OH)3, gold and other metals that are sparingly soluble and thus their molecules do not pass readily into colloidal state. Lyophobic colloids are called as irreversible colloids since the residue cannot readily be reconverted into sol by ordinary means. These solutions are quite readily precipitated and hence they are not stable.
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