Daily Quiz: UPSC Prelims Marathon – May 3, 2018

Characteristic odour of onion and garlic is due to sulphur compound Ally1 propy1 disulphide in onion and Dially 1 disulphide in garlic

total internal reflection is an optical phenomenon that happens when a ray of light strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface. If the refractive index is lower on the other side of the boundary, no light can pass through and all light t is reflected. The critical angle is the angle of incidence above which the total internal reflection occurs. Total internal reflection takes place when light travels from optically denser medium to optically rarer medium Refractive index of diamond is very high (2.417) whereas refractive index of glass is only in between (1.5 to 1.6) whereas in rest all options there is no possibility of total internal reflection because refractive index of water (1.33) and air (1,008) is less than refractive index of glass.

SENSEX is a sensitive index belonging to Bombay stock Exchange (BSE) and is based on 30 of the most important stock available on BSE. A rise reflects positive about the growth of the Indian Economy to the investors it is only changes a price of shares of group of companies registered with BSE.

Methanol has a high toxicity in humans. If ingested, for example as little 10 ml of pure methanol can cause permanent blindness by destruction of the optic nerve , and 30mL is potentially- fatal

Vitamin A group includes retinol. Their parent carotene is a vitamin substance as b carotene

The organization under the Department of Atomic Energy are given below:-

1. Atomic Minerals directorate for research & exploration
2. Heavy water board
3.  Indian Rare Earths Limited
4. Uranium Corporation of India

The new gene inserted is BT gene or Bacillus thuringiensis.it was developed by Monsanto bacterium. The new variant is called Bollgard cotton resistant to bollworm pest.