List of practice Questions

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
Asexual reproductive structure of Hydra is
Hofmann's bromamide reaction is to convert
The correct order in which the first ionisation potential increases is
When conc. $H _{2} SO _{4}$ is heated with $P _{2} O _{5}$, the acid is converted into
Nitration of nitrobenzene at $125^{\circ} C$ with mixed acids gives
Ammonium ion is
Placoid scales are characteristic feature of the class
The medulla oblongata contains centres which control
Which one of the following is the high quality pearl producing species
Which cell inclusions are found in mycoplasmas, spirochaetes and rickeltsias ?
Analogous structures are
The generic name of Mango is
Analogous structures are a result of :
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