Daily Quiz: UPSC Prelims Marathon – May 17, 2018

In nuclear reactors electricity is generated by controlled chain reaction, while in atomic bombs it is uncontrolled chain reaction which gives explosion.

Malnutrition defines a condition that occurs when the body is not getting enough nutrients. Whether resulting from an independent or unbalanced diet, digestive or absorption problem or other medical conditions. Overnutrition , under nutrition and imbalanced nutrition are three forms of malnutrition. Protein energy malnutrition PEM leads to two type of disease viz., marasmus and kwashiorkor ‘marasmus’ is a type of pem caused by simultaneous deficiency of protein and total food calories; whereas ‘ kwashiorkor’ is caused by serve protein deficiency.

The hardness of steel is proportional to percentage of chromium present. Chromium is alloyed with iron to produce steel which can resist high temperature and also have high temperature and also have high hardness and abrasion resistance. It is called stainless steel.

Stars do not appear twinkling in the space because of absence of atmosphere, wind and air currents which changes the position of images of stars to make them appear twinkle

Sky appears jet black because of absence of scattering of light due to gas molecules in the space. Temperature will be higher as we get closer to the Sun.

Barium in a suitable from is administered to patient before an X-ray examination of the stomach, because Barium is good absorber of X-rays and this helps the stomach to appear clearly in contrast with the other region in the picture.

The human malaria parasite plasmodium vivax is responsible for 25-40% of the 515 million annual case of malaria worldwide. Sequencing of entire genome of plasmodium vivax was completed in 1996

Micro nutrients or trace elements are essential mineral elements required in small quantities for plant growth and development. They are Fe, Mn, B, Cu, Zn Mo, Ni and CL, Sodium (Na) is required only for halophytes and not for all plants.