List of practice Questions

A bubble of air is underwater at temperature $15^{\circ}C$ and the pressure $1.5 \,bar$. If the bubble rises to the surface where the temperature is $25^{\circ}C$ and the pressure is $1.0\, bar$, what will happen to the volume of the bubble?
Of the following which one is classified as polyester polymer?
The unit of rate constant for a zero order reaction is -
An electromagnetic wave going through vacuum is described by $E=E_{0}\,\sin \left(kx-\omega t\right)$ Which of the following is/are independent of the wavelength?
"Jaya" and "Ratna" developed for green revolution in India are varieties of
Large woody vines are more commonly found in
For the four successive transition elements $(Cr, Mn, Fe$ and $Co)$ , the stability of $+ 2$ oxidation state will be there in which of the following order? (At. no. $Cr = 24, Mn = 25, Fe = 26,Co = 27$ )
In eubacteria, a cellular component that resembles eukaryotic cell is
A planoconvex lens has a maximum thickness of $6\,cm$. When placed on a horizontal table with the curved surface in contact with the table surface, the apparent depth of the bottommost point of the lens is found to be $4 \,cm$. If the lens is inverted such that the plane face of the lens is in contact with the surface of the table, the apparent depth of the center of the plane face is found to be $\left(\frac{17}{4}\right)\, cm$ .The radius of curvature of the lens is
A ball of mass $ 0.25\, kg $ attached to the end of a string of length $ 1.96\, m $ is moving in a horizontal circle. The string will break if the tension is more than $ 25 \,N $ . What is the maximum speed with which ball can be moved?
Two cells with the same e.m.f. $E$ and different internal resistances $r_1$ and $r_2$ are connected in series to an external resistance $R$. The value of $R$ so that the potential difference across the first cell be zero is
$^{15}C_{3} +\,^{15}C_{5} + .. ...+\,^{15}C_{15} $ will be equal to
Flowers are Zygomorphic in
A prokaryotic autotrophic nitrogen fixing symbiont is found in
Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?
What is common between vegetative reproduction and apomixis?
A drupe develops in
Whorled, simple leaves with reticulate venation are present in
Archegoniophore is present in
The correct floral formula of chilli is :
The value of $ \sum\limits_{n=0}^{\infty }{\frac{{{n}^{2}}+4}{n\,!}} $ is equal to
The equation of the plane perpendicular to the $z$-axis and passing through $ (2,-3,5) $ is
If $ {{4}^{x}}={{16}^{y}}={{64}^{z}}, $ then
If $A$ is a square matrix of order $3$ and a is a real number, then determinant $ |\alpha \,\,\,A| $ is equal to
The ratio in which ZX-plane divides the line segment AB joining the points $ A(4,2,3) $ and $ B(-2,4,5) $ is equal to