Tuesday, 13 January 2015


Most of the light ray inside a tube-light is in the form of ?
Ultra-Violet ray.

Which is the alkaloid that contains in  cola drinks?

Which colour indicate highest temperature?
Dull red

The disease "bronchitis" is associated with ?

Person setting in an artificial satellite of the earth have?
Zero weight

The device used for detecting even feeble current ?
Galvanoscope(An instrument used to detect the presence and determine the direction of electric currents by the deflection of a magnetic needle)

Fraction of volume of ice seen outside when immersed in water?

The pollution which move downward with percolating ground water are ?
Leachates(Lawn and garden chemicals, such as fertilizers and pesticides enter groundwater in two ways. First, they can be carried by rainwater into a stream as runoff. The contaminants can eventually reach groundwater supplies if the stream loses water to the ground. The most common method of groundwater contamination is leaching. Leaching is the downward movement of a dissolved substance through the soil. Residual fertilizers in the soil that plants cannot use, leach through the soil along with rain or irrigation water. Pesticides too, can leach into groundwater, or they may vaporize into the atmosphere, or be broken down by microbial and chemical means into harmless substances)

Which vitamin helps in the absorption of calcium?
Vitamin D(Vitamin D is the most significant nutrient for the proper absorption of calcium.Vitamin D is essential in helping the body absorb and use calcium; in fact, the body cannot absorb calcium at all without some vitamin D)

Who discovered RF(Rhesus Factor)  ?
Karl Landsteiner(He discovered ABO blood group system in 1900 and Rh blood group system including the Rh Factor in 1937,thus enabling Physicians to transfuse blood without endangering patient's life.Rh blood group system is the most important blood group after ABO. At present, the Rh blood group system consists of 50 defined blood-group antigens, among which the five antigens D, C, c, E, and e are the most important. The commonly used terms Rh factor, Rh positive and Rh negative refer to the D antigen only. Besides its role in blood transfusion, the Rh blood group system—specifically, the D antigen—is used to determine the risk of hemolytic disease of the newborn.
 A mother who is Rh-negative may develop antibodies to an Rh-positive baby. If a small amount of the baby’s blood mixes with the mother's blood, which often happens in such situations, the mother's body may respond as if it were allergic to the baby. The mother's body may make antibodies to the Rh antigens in the baby’s blood. This means the mother has become sensitized and her antibodies may cross the placenta and attack the baby’s blood. Such an attack breaks down the fetus’s red blood cells, creating anemia (a low number of red blood cells). This condition is called hemolytic disease or hemolytic anemia. It can become severe enough to cause serious illness, brain damage, or even death in the fetus or newborn. Sensitization can occur any time the fetus’s blood mixes with the mother’s blood. It can occur if an Rh-negative woman has had a spontaneous or undetected miscarriage of a Rh positive fetus.) source- Wikipedia

The image formed on the retina of the human eye is ?
Real and inverted

Poise is the unit of ?
Viscosity of fluid

Colour of sodium vapour lamp is?
Yellow(A sodium-vapor lamp is a gas-discharge lamp(Gas-discharge lamps are a family of artificial light sources that generate light by sending an electrical discharge through an ionized gas, a plasma) that uses sodium in an excited state to produce light.)

Colour of hydrogen vapour lamp is?

Colour of Mercury vapour lamp is ?

Colour of Neon vapour lamp is ?

Colour of Chlorine vapour lamp is ?

Which disease is also known as Hansen's disease?
Leprosy(Leprosy, also known as Hansen's disease (HD), is a chronic infection caused by the bacteria Mycobacterium leprae)

Which substance is also known philosopher's wool ?
Zinc oxide(The compound zinc oxide (ZnO) is called philosopher's wool. Alchemists, as part of their rituals, would burn zinc in air and collect the residue, which formed into white woolly tufts)

Which is positively charged particle emitted by a radioactive element?
Alpha ray(Alpha "rays" are actually high speed particles. An alpha particle is made up of two protons and two neutrons, all held together by the same strong nuclear force that binds the nucleus of any atom. In fact, an alpha particle really is a nucleus - it's the same as the nucleus of a common atom of helium - but it doesn't have any electrons around it, and it's traveling very fast.Because they are identical to helium nuclei, they are also sometimes written as He2+ or 4
 indicating a Helium ion with a +2 charge (missing its two electrons). If the ion gains electrons from its environment, the alpha particle can be written as a normal (electrically neutral) Helium atom 4

Atoms are composed of ?
Electrons and Nuclei

Isotopes are separated by ?

The wavelenght of X-ray is of the order of ?
1 angstrom(1 angstorm = 10−10 m or 10−8 cm)

Mesons are found in ?
Cosmic ray

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