List of practice Questions

Radial symmetry is, usually, exhibited in animals which
Which of the following is an example of platyhelminthes?
Brown ring test is used to detect
Which of the following species does not have the ability to fix atmospheric nitrogen?
Ray optics is valid, when characteristic dimensions are
The dominant second trophic level, in a lake ecosystem, is
The pace setter in the heart is called
The extra embryonic membranes of mammalian embryo are derived from
Phylogenetic classification is one which is based on
A certain compound X when treated with copper sulphate solution yields a brown precipitate. On adding hypo solution, the precipitate turns white. The compoundXis
Lassaigne's test for the detection of nitrogen fails in

The O-O-H bond angle in \(H_2O_2\) is

The weakest among the following types of bond is
The blue colour of the sky is due to the phenomenon of
A wave of frequency 100 Hz travels along a string towards its fixed end. When this wave travels back, after reflection, a node is formed at a distance of 10 cm from the fixed end. The speed of the wave (incident and reflected) is
The protists have
Earliest fossil form in phylogeny of horse is
Schotten-Baumann reaction is a reaction of phenols with
The temperature of the gas is raised from $27^\circ C\, to\, 927^\circ C$ the root mean square velocity is
The displacement-time graph of a moving particle is shown below. The instantaneous velocity of the particle is negative at the point
The distance between two adjacent carbon atoms is largest in
50 mL of hydrogen diffuses out through a small hole of a vessel, in 20 minutes. The time taken by 40 mL of oxygen to diffuse out is
Phosphorus has the oxidation state of + 3 in
The common oxidation states of Ti are
Peptide bond is a key feature in