IITB sci tech2013 Finals funda round

IITB Open SciTech Quiz—8th January 2013 Funda Round

Question

The ouzo effect occurs when a strongly hydrophobic essential is dissolved
in a water-miscible solvent, such as ethanol, and the concentration of
ethanol is lowered by addition of water.
What common phenomenon can be ascribed to the Ouzo effect?

Quizmaster: Antariksh Bothale


Question

Cloudiness in water on addition of dettol/phenyl/absinthe/etc.



Question

Subcutaneous fat absorbs low-frequency light, permitting only the highly-
energetic blue wavelengths to penetrate through, and reflect off.
This causes a particular phenomenon which misleads people into believing
something false about the human body.



Question

Blue veins



Question

Simply breaking open will solve the problem. The deep interior should be
OK. If you abhor such violence, just slice away one strip of the green
toward the stem and stop about one inch from the stem, as the
concentration is likely to be there.
Wash off the knife blade, then repeat peeling from flower end to stem end
until it is peeled. Rinse the knife again and cut up as needed. The
offending chemical should have disappeared.



Question

Cucumber



Question

The molecule responsible for the action is lawsone, otherwise known as
henotannic acid (2-hydroxy-1,4-naphthoquinone).

The acidic functionality of lemon juice serves to destabilize the plant’s
cellulose while allowing the lawsone molecules to remain intact. The lemon
juice attacks the lawsone directly to create a unified acidic substance.
Lawsone, a relatively small molecule, migrates to the site of action and
undergoes a Michaels’ reaction. This reaction happens quite quickly.



Question

Henna (Mehandi)



Question

Scientists originally believed that digestion was a process controlled
entirely by the nervous system. In a 1902 experiment, the small intestine of
a dog whose intestinal nerves were severed were simulated.
It was found that pancreas continued to secrete digestive juices suggesting
that there was some sort of signaling in play.
The Greek words for “to set in motion” were used for this mechanism.



Question

Hormones



Question

The moon’s orbit intersects the Earth’s orbit at two points which are called
as the ascending node and descending node depending on whether the
moon is ascending (moving from South to North) at that point or
descending (moving from North to South.
An eclipse takes place when the three bodies lie in the same plane, which
brings the ascending and descending nodes on the Earth-Sun line.
This is the logic behind what myth in Indian astrology?



Question

Rahu and Ketu are the demons that devour the Sun and the Moon.


IITB sci tech2013 Finals funda round

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IITB sci tech2013 Finals funda round