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Q. What is chlorophyll?
A magnesium complex of porphyrin is called chlotophyll. the green colouring material in plants and which is essential for photosynthesis.
Hemoglobin, plays the role of oxygen carrier in mammalian blood. In hemoglobin Fe2+ ion is not only surrounded by four nitrogens of porphyrin but the fifth position is occupied by nitrogen of the protein as shown in Fig.
Explain objectives of annealing? Discuss the various annealing processes? Is spheroidising different from annealing? Illustrate. A slow cooling rate from eutectoid tempe
Which of the following ions is not having the configuration of neon: (1) F - (2) Mg +2 (3) Na + (4
Although cholrine is electoon withdrawing group.yet it is ortho nd para directing in electrophilic aromatic substitution reactants.why? Ans) Halogens are an exception of the dea
Chemistry in action - Antiseptics The chemical substances that are utilized to kill or avoid the growth of micro-organisms are known as antiseptics. These are not harmful to li
what is ionisation energy
In the following which substance will have highest boiling point: (1) He (2) CsF (3) NH 3 (4) CHCl 3 Ans: CsF
Q. Write short note on "Electrically conducting polymers". Ans. electrically conducting polymers: Many synthetic organic polymers have been found to possess high electrical c
Why alcoholic acidity of maids is expressed as H2SO4?
Define the following observations: (i) Most of the known noble gas compounds are those of xenon. (ii) CIF3 exists but FCI 3 does not. (iii) Between the hydrides of elemen
how we synthesis picric acid why it required 1 hour for the reaction with HNO3,H2SO4 and show the mechanism of picric acid and uses of picric acid. and what is the role of HNO3,H2S
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