List of top Questions asked in NEET (UG)- 2008

An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be
Bacterial leaf blight of rice is caused by a species
Bond dissociation enthalpy of ${H_2, Cl_2}$ and $HCl$ are $434, 242$ and ${431 \, kJmol^{- 1}}$ respectively. Enthalpy of formation of $HCl $ is
Consider the following four statements (1-4) about certain desert animals such as kangaroo rat (1) they have dark colour and high rate of reproduction and excrete solid urine (2) they do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs (3) they feed on dry seeds and do not require drinking water (4) they excrete very concentrated urine and do not use water to regulate body temperature. Which two of the above statements for such animals are true?
Darwin's finches are a good example of
Dry indehiscent single-seeded fruits formed from bicarpellary syncarpous inferior ovary is
Endosperm is consumed by developing embryo in the seed of ....
Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the $ H^+ $ ion concentration in the mixture?
For the gas phase reaction, ${PCl_{5} (g) <=> PCl_{3} (g) + Cl_{2} (g)}$ which of the following conditions are correct ?
How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
How many stereoisomers does this molecule have? $CH_3CH = CHCH_2CHBrCH_3$
In humans blood passes from post caval to the diastolic right atrium of heart due to
Polysome is formed by
Standard free energies of formation (in kj/mol) at 298 K are -237.2, -394.4 and -8.2 for $H_2O(l),CO_2(g) $ and pentane (g), respectively. The value of $E^0_{cell} $ for the pentane-oxygen fuel cell is
The blood calcium level is lowered by the deficiency of
The dissociation equilibrium of a gas $ AB_2 $ can be represented as $2 A B_2(g) \rightleftharpoons 2 A B (g) + B_2 (g) $ The degree of dissociation is $x$ and is small compared to $1$. The expression relating the degree of dissociation (x) with equilibrium constant $K_p$ and total pressure $p$ is
The distance travelled by a particle starting from rest and moving with an acceleration $\frac{4}{3}ms^{-2},$ in the third second is
The most active phagocytic white blood cells are
Two radioactive materials $X_1$, and $X_2$ have decay constants 5$\lambda$ and $\lambda$ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X$_1$ to that X$_2$ will be 1/e after a time
Unisexuality of flowers prevents
Volume occupied by one molecule of water $(density\, = 1 g\, cm^{-3} )$ is
What volume of oxygen gas $(O_2)$ measured at $0^\circ C$ and 1 atm, is needed to bum completely 1L of propane gas $(C_3H_8)$ measured under the same conditions?
Which one of the following is not a characteristic of phylum Annelida?
Which of the following are not state functions? (I) q + W (II) q (III) w (IV) H-TS
World Summit on Sustainable Development (2002) was held in