A. Solid in solid B. Solid in liquid C. Solid in gas D. Gas in gas Smoke is a colloidal solution of suspended dust particles in the air. So, in the smoke dispersed phase is solid dust particles, and the dispersed medium is air which is a mixture of gases. Hence, Smoke is a solid … Read more
A. mmHg B. mg/deciliter C. PPM D. Gram/Liter
A. Lens B. Prism C. Mirror D. Slabs In optics, a prism is a transparent optical element with flat, polished surfaces that refract light. In a rainbow, raindrops in the air act as tiny prisms. Light enters the raindrop, reflects off of the side of the drop and exits. In the process, it is broken … Read more
A. Gases B. Ice C. Molten lava D. Cosmic rays The ‘Solar Corona’ mainly consists of molten lava. A corona (Latin, ‘crown’) is an aura of plasma that surrounds the Sun and other stars. The Sun’s corona extends millions of kilometres into outer space and is most easily seen during a total solar eclipse, but … Read more
A. 1766 B. 1896 C. 1935 D. 2001
A. fear of dogs B. fear of helicopters C. fear of touch D. fear of houses
A. Kidney B. Brain C. Spleen D. Liver
A. Nitrogen B. Hydrogen C. Carbon Dioxide D. Argon When you inhale (breathe in), air enters your lungs, and oxygen from that air moves to your blood. At the same time, carbon dioxide, a waste gas, moves from your blood to the lungs and is exhaled (breathed out). This process, called gas exchange, is essential … Read more
A. dry skin B. dry mouth C. dry nose D. dry head Xerostomia refers to the sensation of oral dryness, which can result from diminished saliva production. Dry mouth. It occurs when the body is not able to make enough saliva.
A. Ladybird B. Bee C. Cockroach D. Termite Cockroaches are infamous for their tenacity, and are often cited as the most likely survivors of a nuclear war. Some even claim that they can live without their heads. It turns out that these armchair exterminators (and their professional brethren) are right. Headless roaches are capable of … Read more