List of top Questions asked in KCET, WBJEE

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

The projection of $\vec{a}=3\hat{i}-\hat{j}+5\hat {k} $ on $\vec{b}=2 \hat {i}+3 \hat j+\hat k$ is

Three moles of $PCl_5$, three moles of $PCl_3$ and two moles of $Cl_2$ are taken in a closed vessel. If at equilibrium the vessel has $1.5$ moles of $PCl_5$, the number of moles of $PCl_3$ present in it is

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

The ten's digit in $1! + 4!+ 7! + 10!+12! + 13! + 15! +16! + 17!$ is divisible by

The characteristic roots of the matrix $\begin{bmatrix} {1}&{0} &{0}\\ {2}&{3}& {0} \\ {4}&{5}&{6}\\ \end{bmatrix} $ are

Oryza sativa is the binomial name of the rice plant, the sativa stands for

Royal jelly is secreted from

Mercury is a liquid metal because

Anisole can be prepared by the action of methyl iodide on sodimn phenate. The reaction is called

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?