List of practice Questions

The relative Lewis acid character of boron trihalides is in the order:

Which of the following compounds is the strongest acid?

The mass of a photon with wavelength $ 3.6\,??$ is:

An electron with values $4, 2, -2$ and $+1/2$ for the set of four quantum numbers $ n,\,\,l,\,\,{{m}_{l}} $ and $ s $ respectively, belongs to:

Which of the following compounds has the highest boiling point?

Which of the following acts as pickling agent?

Which is chemically most active non-metal?

Which is correct to saprophytic angiosperm ?

Which is function of pseudopodia besides locomotion in Amoeba ?

Which does not react with Fehling solution?

What is common between chloroplasts, chromoplasts and leucoplasts ?

Water in plants is transported by:

Variable valency is a general feature of

Which is used to obtain salicylic acid from phenol?

Urea is produced in

Urine is expelled from body through

Two rigid boxes containing different ideal gases are placed on a table. Box $A$ contains one mole of nitrogen at temperature $T_0$, while box $B$ contains one mole of helium at temperature $(7/3)\, T_0$. The boxes are then put into thermal contact with each other, and heat flows between them until the gases reach a common final temperature (Ignore the heat capacity of boxes). Then, the final temperature of the gases, $T_f$, in terms of/$T_0$ is :

Two concentric circular coils of ten turns each are situated in the same plane. Their radii are $20\, cm$ and $40\, cm$ and they carry respectively $0.2\, A$ and $0.3\, A$ currents in opposite direction. The magnetic field in tesla at the centre is

Trochophore is the larva of:

Transition elements form a large number of coordination compounds because they have

To a fish under water, viewing obliquely a fisherman standing on the bank of a lake, the man looks

Time period of a spring mass system is $T$. If this spring is cut into two parts whose lengths are in the ratio $ 1:3 $ and the same mass is attached to the longer part, the new time period will be

The top of the atmosphere is at about $400\, kV$ with respect to the surface of the earth, corresponding to an electric field that decreases with altitude. Near the surface of the earth, the field is about $100 \,Vm^{-1}$. Still, we do not get an electric shock as we step out of our house into the open because (assume the house to be a steel cage so that there is no field inside)

What is the cell reaction occurring in Daniel cell (Galvanic cell)?

The potential energy of a 1 kg particle free to move along the $x$-axis is given by $V\left(x\right)=\left(\frac{x^{4}}{4}-\frac{x^{2}}{2}\right)\,J.$ The total mechanical energy of the particle is 2 J. Then , the maximum speed (in m/s) is :