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MALT constitutes about _______ percent of the lymphoid tissue in the human body.
Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections?
Which one of the following acts as a physiological barrier to the entry of microorganisms in a human body?
Damage to the thymus in a child may lead to:
In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels?
At which stage of HIV infection does one usually show symptoms of AIDS?
Which part of poppy plant is used to obtain the drug Smack?
HIV that causes AIDS first starts destroying:
For a certain reaction, the rate $= k[A]^2[B]$, when the initial concentration of A is tripled keeping concentration of B constant, the initial rate would
Match List-I with List-II : List-I (Oxoacids of Sulphur) A. Peroxodisulphuric acid B. Sulphuric acid C. Pyrosulphuric acid D. Sulphurous acid List-II (Bonds) I. Two S-OH, Four S=O, One S-O-S II. Two S-OH, One S=O III. Two S-OH, Four S=O, One S-O-O-S IV. Two S-OH, Two S=O Choose the correct answer from the options given below.
The right option for the mass of $CO_2$ produced by heating $20\text{ g}$ of $20\%$ pure limestone is (Atomic mass of $Ca = 40$) $[CaCO_3 \xrightarrow{1200\text{ K}} CaO + CO_2]$
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : In equation $\Delta_r G = -nFE_{cell}$ value of $\Delta_r G$ depends on n. Reasons R : $E_{cell}$ is an intensive property and $\Delta_r G$ is an extensive property. In the light of the above statements, choose the correct answer from the options given below
Which of the following statements are INCORRECT? A. All the transition metals except scandium form MO oxides which are ionic. B. The highest oxidation number corresponding to the group number in transition metal oxides is attained in $Sc_2O_3$ to $Mn_2O_7$. C. Basic character increases from $V_2O_3$ to $V_2O_4$ to $V_2O_5$. D. $V_2O_4$ dissolves in acids to give $VO_4^{3-}$ salts. E. $CrO$ is basic but $Cr_2O_3$ is amphoteric. Choose the correct answer from the options given below:
What fraction of one edge centred octahedral void lies in one unit cell of fcc?
Which complex compound is most stable?
Complete the following reaction: [A] $\xrightarrow{HCN}$ [B] $\xrightarrow[\Delta]{conc. H_2SO_4}$ [C]. [C] is
Consider the following compounds/species: i. Naphthalene, ii. Cyclopentadienyl anion, iii. Cyclobutadiene, iv. Cyclopropenyl cation, v. Cyclopropenyl cation (with positive charge), vi. Cyclooctatetraene, vii. Anthracene. The number of compounds/species which obey Huckel's rule is ________.
Which amongst the following options are correct graphical representation of Boyle's law?
A certain patient, X, is suspected to be suffering from acquired immune deficiency syndrome. Which diagnostic technique will you recommend for its detection?
Coca alkaloid or cocaine is obtained from: