List of top Questions asked in WBJEE- 2008

A battery of e. m. f. $E$ and internal resistance $r$ is connected to an external resistance $R$ the condition for maximum power transfer is
When sound is produced in an aeroplane moving with a velocity of $200 \,m/s$ horizontal its echo is heard after $ 10\sqrt{5}\,s. $ If velocity of sound in air is the elevation of aircraft is
One possible condition for the three points $(a, 5), (b, a)$ and $(a^2, - b^2)$ to be collinear is
If $\,^{16}C_{r} =\, ^{16}C_{r+1}$, then the value of $\, ^{r}P_{r-3}$ is
The binary number $10111$ is equivalent to the decimal number
Dimorphism of chloroplast is found in
In which book, Bentham and Hooker proposed their classification?
An unknown element forms an oxide. What will be the equivalent weight of the element if the oxygen content is $20\%$ by weight?
$1$ mole of methyl amine on reaction with nitrous acid gives at $NTP$
To which of the following flower synandrous condition is found?
Filariasis is caused by
Oryza sativa is the binomial name of the rice plant, the sativa stands for
Royal jelly is secreted from
Two stretched strings have lengths $l$ and $2l$ while tension are $T$ and $4T$ respectively. If they are made of same material the ratio of their frequency is
Which of the following hormone helps in secretion of HCl from stomach?
Which one of the following is the infective stage of Ascaris lumbricoides?
Which one of the following pairs is obtained on heating ammonium dichromate?
Which of the following expressions gives the de-Broglie relationship?
Which of the following element is responsible for Minamata disease?
Which of the following acids has the smallest dissociation constant?
When $KI$ is added to acidified solution of sodium nitrite, then
What is the structural element of cell wall?
Water vascular system is present in which of the following phylum?
The vector of the kala- azar is
The value of $\cos \frac{\pi}{15}\, \cos \frac{2\pi}{15}\, \cos \frac{4\pi}{15}\, \cos \frac{8\pi}{15} $ is