Rainbow is produced by tiny rain drops suspended in front of sun rays as a result of _____.

1. 1. Reflection and interference
   2. Refraction and dispersion
   3. Interference
   4. Reflection, refraction and dispersion

The hormone that increases the rate of heart beat and blood pressure after shock in a person is _____.

1. 1. Throxin
   2. Pancreatin
   3. Adrenalin
   4. Gastrin

The newly discovered high-temperature superconductors are _____.

1. 1. Ceramic oxides
   2. Metal alloys
   3. Pure rare-earth metals
   4. Inorganic polymers

Of the following, which provides the maximum amount of energy in the present day world?

1. 1. Coal
   2. Liquid fuels
   3. Atomic energy
   4. Hydroelectric power resources

Pasteurised Milk is _____.

1. 1. Milk mixed with protein rich powder
   2. Specially treated milk in order to kill bacteria
   3. Milk rich in fats
   4. Medicated milk for children

When water boils, its temperature _____.

1. 1. fluctuates around a value
   2. begins to decrease
   3. begins to increase
   4. remains constant

Bagasse, a by-product of sugar manufacturing industry, is used for the production of _____.

1. 1. Paper
   2. Alcohol
   3. Glass
   4. Confectioneries

The antibiotic penicillin is obtained from _____.

1. 1. Sea weeds
   2. Plants
   3. Bacteria
   4. Fungus

Which of the following has been found useful in keeping the cholesterol level down?

1. 1. Garlic
   2. Tulsi
   3. Turmeric
   4. Serpentina

Which of the following scales was devised by Celsius?

1. 1. Absolute
   2. Romer
   3. Centigrade
   4. Fahrenheit