Write the structural difference of anions present in
`MgCaSi_2 O_6`

Write the structural difference of anions present in Be_3 Al_2 Si_6 O_(18)

Silicon is the second most abundant element (~27.2%) in the earth's after oxygen (45.5 %) Carbon. Silicon, germanium, tin and lead constitute the group 14 of the periodic table. Chemistry of silicon is distinctly different from that of carbon. For example, under standard conditions CO_(2) is a gas whereas SiO_(2) is a covalent solid. Draw the structure of the anion present in pyroxene (MgCaSi_(2)O_(6)) . Silicones are important synthetic polymers which find extensive applications due to their chemical inertness and water repelling nature. Thet are produced via the following reactions. 2 C_(6)H_(5)Cl +Si underset("370 K")overset("Cu")to A A underset(-HCl)overset(H_(2)O)to B

Write down the structure of sugar present in DNA.

Write the main structural difference between DNA and RNA. Of the two bases, thymine and uracil, which one is present in DNA ?

Write structure of different chain isomers of alkanes corresponding to the molecular formula C_(6)H_(14) Also write IUPAC names.

(a) Mention any two components of blood. (b) Trace the movement of oxygenated blood in the body. (c ) Write the function of valves present in between atria and ventricles. (d ) Write one structural difference between the composition of artery and veins.

Enumerate the structural differences between DNA and RNA. Write down the structure of a nucleoside, which is present only in RNA.

What of the following anions are present in clay ?

Write the cations and anions present (if any) in the following compounds? a) CH_(3)COONa b) NaCl c) H_(2) d) NH_(4)NO_(3)

Write the structural formula for seven compounds with the formula C_(3) H_(6) O and identify the funcitonal groups.