List of practice Questions

Inverted omega shaped vascular bundles are found in :
Apogamy results in formation of :
Cuscuta is a :
Coacervates are :
What is plasmid?
An object of mass 26 kg floats in air and it is in equilibrium state. Air density is $1.3 \,kg/m^3$ . The volume of the object is :
Which of the following relation represents correct relation between standard electrode potential and equilibrium constant? ?. $\log K=\frac{n F E^{\circ}}{2.303 R T}$ II. $K=e^{\frac{n F E^{\circ}}{R T}}$ III. $\log K=\frac{-n F E^{\circ}}{2.303 R T}$ IV. $\log K=0.4342 \frac{n F E^{\circ}}{R T}$ Choose the correct statement(s).
Which of the following represents Schotten- Baumann reaction?
Which of the following compounds will give positive iodoform test ?
Which halogen has the highest value of negative electron gain enthalpy ?
Two very long, straight, parallel wires carry steady currents $ I$ and $-I$ respectively. The distance between the wires is $d$. At a certain instant of time, a point charge $q$ is at a point equidistant from the two wires, in the plane of the wires. Its instantaneous velocity $v$ perpendicular to this plane. The magnitude of the force due to the magnetic field acting on the charge at this instant is
The yellow colour of urine is due to the presence of
The number of radial nodes of $3s$ and $2p$ orbitals are respectively
The number of atoms per unit cell of $bcc$ structure is
Stronger is oxidising agent, more is
Specific conductance of o.1 \,M \,HA is $3 \cdot 75 \times 10^{-4} \,ohm ^{-1} \, cm ^{-1}$. Find the dissociation constant $K _{ a }$ of $HA$, if $\lambda_{\infty}( HA )=250 \, ohm ^{-1} \, cm ^{2} \,mol ^{-1}:$
In the formula $X=3 Y Z^{2}, X$ and $Z$ have dimensions of capacitance and magnetic induction respectively. The dimensions of $Y$ in $MKSA$ system are :
In Fraunhofer diffraction pattern, slit width is $0.2\, mm$ and screen is at $2 \,m$ away from the lens. If wavelength of light used is $5000 \, \mathring A $ then the distance between the first minimum on either side of the central maximum is ($\theta$ is small and measured in radian)
If the eccentricity of the hyperbola $x^{2}-y^{2} cos ec^{2} \alpha=25 is \sqrt{5}$ times the eccentricity of the ellipse $x^{2} cos ec^{2} \alpha+y^{2}=5, then \alpha$ is equal to :
If $\int \frac{\cos x-1}{\sin x+1} e^{x} d x$ is equal to:
The number of unpaired electrons in $\left[NiCl_{4}\right]^{2-}, Ni\left(CO\right)_{4}$ and $\left[Cu\left(NH_{3}\right)_{4}\right]^{2+}$ respectively are :
$PbCl_2$ is insoluble in cold water. Addition of $HCl$ increases its solubility due
Of the following compounds, which one is the strongest Bronsted acid in aqueous solution?
How many different nine digit numbers can be formed from the number $223355888$ by rearranging its digits so that the odd digits occupy even positions?
The shape of $XeF_{5}^{-}$ will be