List of top Questions asked in Tripura Joint Entrance Examination

In HF molecule, internuclear distance is 0.92 Å and dipole moment approximates 2 D. Estimate the percentage ionic character of HF molecule.
First ionisation potential energy of Li(m) is 520 kJ/mol$^{-1}$, hence calculate the energy required to convert Li-atoms present in 70 mg Li(m) into Li$^+$ ion.
How would you differentiate between $ \text{O}_3 $ and $ \text{H}_2\text{O}_2 $ (chemically)?

Identify the product(s) of the following two reactions (i) and (ii):

Write the end product of the following reaction:

Analyzing the following reaction, ascertain the final product:

In solid state, nitrogen exists in two different allotropic forms ($\alpha$ and $\beta$). Give an idea regarding their shapes and stability.

Ascertain the products $B_1$ and $C_1$ of the following reaction:

Upon addition of phenolphthalein to the aqueous solution of borax, pink colour generates i.e. solution becomes pink. At this stage, if glycerol is being added to the pink coloured solution, it turns colourless. Highlight the phenomenon.
In aqueous medium, cations like $ \text{H}^+ $ and $ \text{Li}^+ $ undergo hydration and exist in the hydrated form. Predict the numbers of water molecules surrounded with $ \text{H}^+ $ and $ \text{Li}^+ $ ions to form stable complex structure respectively.
1 mole gas at standard pressure and at 27°C temperature is heated such that its volume and pressure both become doubled. The final temperature will be
Two plane mirrors kept at some angle with each other produce 5 images of any object kept between them. If the angle is decreased by 30°, then the number of images will be
Both sides of a convex lens have radius of curvature 40 cm and the refractive index of its glass is 1.5. The focal length of the lens is
The radius of curvature of a convex mirror is 40 cm and the object size is double that of image size. The image distance will be
If the refractive index of the material of an equilateral prism is $ \sqrt{3} $, the minimum angle of deviation will be


An ideal monatomic gas follows the ABCDA path in the adjoining P-V diagram. The work done by the gas will be

Two springs of spring constants $ k_1 $ and $ k_2 $ are joined together in series combination. The spring constant of the combination is
A uniform meter-scale is bent at the middle to form a perfect rectangle. Now the distance of the centre of gravity of this rectangle from middle of the scale will be
The weights of a hollow metallic sphere in air and when submerged in water are 264 gm-wt and 221 gm-wt respectively. If specific gravity of the metal is 8.8, then volume of the hollow portion is
Material in earth and moon is same but radius of earth is 10 times that of moon and acceleration due to gravity in earth is 6.4 times that in moon. Then the ratio of escape velocity in earth and in moon will be
Two projectiles are thrown at angles $ \theta $ and $ (90^\circ - \theta) $ with same initial velocity and range $ R $. If maximum height attained by them are $ H_1 $ and $ H_2 $ respectively, then
100 N horizontal force is applied on a body of mass 10 kg kept on a rough horizontal surface. If coefficient of friction between the surface and the body is 0.5, then the acceleration produced in the body will be


In the adjoining figure, if the pulley and the inclined plane are frictionless, then upward acceleration of the mass $ m $ will be

The position of a particle at time $ t $ is given by $ \vec{r} = \vec{r_0}(1 + at) $, where $ \vec{r_0} $ and $ a $ are two constants. When will the particle come back to its starting position?
If the dimensional unit of magnetic permeability ($ \mu $) is given by $ [MLT^{-2}I^{-2}] $, then the dimensional unit of electric permittivity ($ \epsilon $) will be