1. What is synthetic rubber?
Synthetic rubber made of certain kinds of hydrocarbons. Of these butadiene is the most important. These hydrocarbons are obtained from coal, crude petroleum and alcohol. By the end of the Second World War, the combined production of synthetic rubber by Synthetic rubber is more oil resistant than natural rubber. In the international market, natural rubber is facing severe competition from synthetic rubber.
2.What does the term ‘grand Slam’ mean?
Grand Slam is a sports term pertaining to a group of matches, Championships etc. in a particular sports and the winning of all these matches. The best known Grand Slams are those in Tennis [the Australian Open, the French Open, the British Open, the French Open, Wimbledon, and the US Open], Golf [the US Open, the British Open, the Masters, and the PGA], and Rugby Union [victories against all opposition in the competition between England Wales, France, Ireland and Scotland].
3. Who discovered oxygen?
Joseph Priestly discovered oxygen, the colorless, odorless, gaseous chemical element forming about 20 percent of the Earth’s atmosphere in 1774.
4. Who invented the stethoscope and when?
In 1816, the French physician Rene Theoplhie Laennec (1781-1826) introduced a perforated wooden cylinder which concentrated the sounds of air flowing in and out of the lungs, and described the sound which it revealed. The modern form of stethoscope, with flexible tubes connecting the earpieces to a circular piece placed against the chest, was developed later in the nineteenth century.
5. What is the brain death?
Brain death means the irreversible brain damage causing the end of independent.
6.Which country is the leading producer of mica?
India is the world’s leading producer of sheet mica and accounts for about 60 percent of global mica trade. Important mica bearing pegmatite occurs in Andhra Pradesh, Bihar, Gujarat, Hariyana, Karnataka, Kerala, Maharashtra, Orissa, Rajasthan, Tamil Nadu and West Bengal.
7. Why is Japan called “The Land of the Rising Sun”?
The little of “The Land of the Rising Sun” is a form of Japan’s indigenous name of Nippon, which literally means “sun origin”. The allusion is to the geographical location of Japan with regard to China. The Japanese flag shows the sun’s red on a white background.
8. Which is the largest temple in the world?
According to the Guinness Book of Records 1999, Angkor Wat (“City Temple”) in Cambodia is the largest religious structure ever built, covering an area of 402 acres. The entire temple complex has a total area of 15 by 5 miles and consists of 72 major monuments, the construction of which began in AD 900.
