what is meant by the following terms?

Question

dipole moment,
oscillating dipole moment,
optically active molecules,
incandescent,
aqueous,
chromophores and auxochromes,
intermolecular h2 bonding and intramolecular h2 bonding

Answer 1

Dipole Moment : In Chemistry, it is the expression of the degree of polarity of a polar molecule; it is measured by product of electrical charges and the distance of separation between the positive and negative electrical centres of a dipole. In physics (Electricity and Magnetism), it has smilar definitions.
Oscillating dipole moment : not sure.
Optically Active molecules : Optically active molecules are those which rotate the plane polarized light passing through it in certain angle either to left or right. It has to fulfill certain conditions like possessing a plane of symmetry, Centre of Symmetry etc. (see Isomerism of Organic compounds in Chemistry)
Incandescent : which emits light.
Aqueous : related to water.
Chromophores and Auxochromes : Certain groups containing multiple bonds impart intrinsic colour to a compound; these are chromophores. (The compound is called Chromogen). Example: Azo, Nitroso, Nitro, carbonyl, thio carbonyl etc.
Auxochromes are the groups which themselves are not chromophores but deepen the colour of a coloured compound. Example : hydroxy, carboxylic, etc.
Intermolecular and Intramolecular hydrogen bond : A hydrogen atom bonded to a strong electro-negative element, say X (X=F, O or N by a covalent bond X-H, when comes in contact with another strong electro-negative element Y, hydrogen atome gets bonded to Y by a weak electrostatic attarction. This is hydrogen "bond" ( it is not a normal chemical bond but a mere electrostatic attraction). When such bonding occurs between two molecules, it is called Intermolecular H bonding, like those in polymer of Hydrogen Fluoride, HFn, Alcohol, Water etc. When it occurs within one molecule, it is called Intramolecular; example sharing of one oxygen in Ortho-nitro phenol, O-Hydroxy benzoic acid etc. [I am sorry, but this could have been better explained with the help of proper diagram]

Answer 2

HD = puzzling force MB = Megabyte (128 probable reffering to the quantity of MB on the RAM - Random get entry to memory) - something under 512 MB of RAM isn't well worth getting. Pentium 4/Pentium 3 are processors, yet those particular processors are frequently put in on lots extra high priced computers. The extra much less costly ones have processors of different Intel titles. ok = kilobyte. verify the fee of the ISP (internet service service) community in the previous you purchase a router for instantaneous get entry to on line, as vendors networks/centers do not all use ADSL 2 connection. See if there are any swifter modems than 56K (one hundred some thing ok)

Answer 3

aqueous means in water

Answer 4

Don't be so lazy. . . .read your biology book and LEARN the answers so you understand. . . don't just memorize them to pass your test.