List of practice Questions

The enthalpy of the formation of $CO_2$ and $H_2O$ are - $395\, kJ$ and - $285\, kJ$ respectively and the enthalpy of combustion of acetic acid is $869\, kJ.$ The enthalpy of formation of acetic acid is:

Among the following compounds of Boron, the species which also forms $\pi $ - bond in addition to $\sigma$ - bonds is:

Give the IUPAC name for the following structure :

In terms of polar character which one of the following orders is correct?

Epinasty movement is found in :

Dinosaurs disappeared during :

Imbibtion is a :

A molecule of ATP is structurally similar to a molecule of :

Hydathodes are meant for :

Apogamy results in formation of :

Cuscuta is a :

Inverted omega shaped vascular bundles are found in :

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 $\lambda_{\infty}( HA )=250 \, ohm ^{-1} \, cm ^{2} \,mol ^{-1}:$