List of practice Questions

Consider the following species $(\mathrm{I}){\mathrm{S}}_4{\mathrm{O}}_6^{2-}$$(\mathrm{II}){\mathrm{S}}_3{\mathrm{O}}_9$$(\mathrm{III}){\mathrm{S}}_2{\mathrm{O}}_5^{2-}$$(\mathrm{IV}){\mathrm{P}}_3{\mathrm{O}}_9^{3-}$Which of the above species have same number of $X-0-X$ linkages? $(X=P\text{ or }S)$

Q in the above sequence of reactions is

The correct statement(s) about following sugars (X) and (Y) is/are:

Blackened oil painting can be restored into original form by the action of:

The addition of HBr to 2-pentene gives

Which one of the following observations is not true when a mixture of KCl, K2Cr2O7 and conc. H2SO4 is warmed carefully?

Consider the following diagram and mark the correct answer.

Polysaccharides are formed by _______.

Which of the following is a reason for the addition of spice oils to certain foods for the reason of preservation?

Which of the following groups of organisms does not belong to indicator species?

Whose work is to protect the land from floods, remove sediments and other pollutants and recharge groundwater?

Soil around the stem of a potato plant is constantly removed from a very young stage so that only roots remain in the soil. Potato  tubers in the plant will

By which of the following defects, thalassemia is caused?

Which one of the following is a correct option with reference to pathogenic bacteria and DDT?

Which of the following is not a process of asexual reproduction?

Which of the following is correct regarding the 'El Nino' effect?

The cranial nerves which originate from the medulla oblongata are:

Which among the following is incorrect about polysaccharides?

R.Q. for succinic acid as respiratory substrate under aerobic condition is ___________.

Which of the following is not applicable for Divergent evolution ?

Meselson and Stahl used which radio isotopes for their experiment?

${\mathrm{Na}}^{+}/{\mathrm{K}}^{+}$pump in a cell is an example of:

Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when :

In which of the following places thalassemia is not common?

Where are stomata present in submerged hydrophytes?