List of top Questions asked in AIIMS- 2011

Magnification of a convex mirror is always positive, but that of a concave mirror may be both positive or negative. It depends on the sign convention chosen.
$KE$ is conserved at every instant of elastic collision. No deformation of matter occurs in elastic collision.
In the transmission of long distance radio signals, short wave band is used. In shorter wavelength, attenuation is very less.
Helium is used in diving apparatus. Solubility of helium is less in blood.
$H_2S$ is less acidic than $H_2$ Te Te has larger radius than S.
Fructose is a reducing sugar. It has a ketonic group.
Blood in cockroach is colourless haemolymph with no respiratory pigment. Respiration in cockroach occurs through diffusion in haemolymph.
: As a lead storage battery gets discharged, density of electrolyte, present in it, decreases. : Lead and lead dioxide both react with sulphuric acid to form lead sulphate.
Algal blooms are formed in nutrientless water. Algal blooms in water turn it unfit for human consumption, but cause enormous growth of fish.
A mangrove tree growing in marshy place has pneumatophores. Pneumatophores help in better anchorage to marshy soil.
An organic compound $'X'$ on treatment with pyridinium chlorochromate in dichloromethane gives compound $'Y'$ Compound $'Y'$ reacts with $I_{2}$ and alkali to form triiodomethane. The compound $'X'$ is
$CH _{3} COOH \xrightarrow{ LiAlH _{4}}A + CH _{3} COOH \xrightarrow{ H _{3} O ^{+}} B + H _{2} O$ In the above reactions ' $A$ ' and ' $B$ ' respectively are
Which one of the following noble gases is used in miners cap lamps?
The following are some statements related to $VA $ group hydrides, I. Reducing property increases from $NH_{3}$ to $BiH_{3}$ II. Tendency to donate lone pair decreases from $NH_{3}$ to $BiH_{3}$ III. Thermal stability of hydrides decreases from $NH_{3}$ to $BiH_{3}$ IV. Bond angle of hydrides decreases from $NH_{3}$ to $BiH_{3}$ The correct statements are
Which of the following is not tetrahedral?
$138\, g$ of ethyl alcohol is mixed with $72\, g$ of water. The ratio of mole fraction of alcohol to water is
In which of the following groups are seeds present?
One of these protozoans is threat to apiculture and sericulture
Ergotamine tartarate extracted from Claviceps, is used for cure of
What type of sorus is present in Nephrolepis?
Pappus helps in dispersal of pollen in
After glycolysis, fate of glucose in mitochondrial matrix is
The animal group which does not exist in Galapagos island is
Protists obtain their food as
Photosynthetic bacteria have