List of practice Questions

Which of the following are uricotelic animals?

Alum helps in purifying water by

According to Wein's displacement law

Number of electrons transferred in each case when $KMnO_4$ acts as an oxidising agent to give $MnO_2,Mn^{2+},Mn(OH)_3$ and $MnO^{2-}_4$ are repectively

The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, $K^+, Ca^{2+}, Mg^{2+}, Be^{2+}$

Which one of the following spherical lenses does not exhibit dispersion? The radii of curvature of the surfaces of the lenses are as given in the diagrams

Which of the following is absent in polluted water:-

Which of the following species represent the example of $dsp^2$ -hybridization ?

Zn gives $H_2$ gas with $H_2SO_4$ and HCI but not with $HNO_3$ because :-

Which is most basic ?

Vessels are found in :-

Jacob and Monad studied lactose metabolism in E. coli and proposed operon concept. Operon concept is applicable for:-

IUPAC name of the following is $ CH_2=CH-CH_2CH_2-C \equiv CH $

In the following reaction, product 'P' is :-

In fluid mosaic model of plasma membrane

In borax bead test which compound is formed?

In a PN junction :-

Geometrical isomers are differ in :-

General electronic configuration of lanthanides are

Empirical formula of a hydrocarbon containing 80% carbon and 20% hydrogen is:

When one of the slits of Young's experiment is covered with a transparent sheet of thickness 4.8 mm, the central fringe shifts to a position originally occupied by the 30th bright fringe. What should be the thickness of the sheet if the central fringe has to shift to the position occupied by 20th bright fringe ?

Which of the following has smallest size ?

Which reaction is not feasible?

Three different objects $m_{1}, m_{2}$ and $m_{3}$ are allowed to fall from rest and from the same point $O$ along thrce different frictionless paths. The speeds of the three objects, on reaching the ground, will be in the ratio of

The potential barrier, in the depletion layer, is due to