Benzene and toluene form nearly ideal solutions. At 20°C, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at 20°C for a solution containing 78 g of benzene and 46 g of toluene in torr is

Anonymous User Chemistry Solutions 15 Mar, 2020 1 Answer 54 views

An organic liquid with sweet smell and 78°C contains C, H and O. On heating with conc. H2SO4 gives a gaseous product (B) of empirical formula (CH2)n. Compound (B) decolourises bromine water and alk. KMnO4. (B) also reacts with one mole of H2 in presence of Ni. What are (A) and (B)?

Anonymous User Chemistry Alcohols Phenols and Ethers 15 Mar, 2020 0 Answer 63 views

Although both polymers are prepared by free radical processes, poly (vinyl chloride) is amorphous and poly (vinylidene chloride) (saran) is highly crystallilne. How do you account for the different? (vinylidene chloride is 1,1- dichloroethene).

Anonymous User Chemistry Polymers 15 Mar, 2020 1 Answer 54 views

Crystals of Bt toxin produced by some bacteria do not kill the bacteria themselves because −
(a) bacteria are resistant to the toxin
(b) toxin is immature:
(c) toxin is inactive:
(d) bacteria encloses toxin in a special sac.

Anonymous User Biology Biotechnology and its Applications 15 Mar, 2020 1 Answer 62 views

Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled A, B and C; but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20mg/L, 8mg/L and 400mg/L, respectively. Which sample of the water is most polluted? Can you assign the correct label to each assuming the river water is relatively clean?

Anonymous User Biology Microbes in Human Welfare 14 Mar, 2020 1 Answer 63 views