List of top Questions asked in KEAM- 2019

A 5.2 L closed container contains some water and N$_2$(g) at 29 $^\circ$C. The total pressure of the system and water tension are 1 atm and 0.04 atm, respectively. Upon electrolysing the liquid water inside completely, the final pressure of system was at 2 atm. What is number of moles of water that was present inside the container?
A solution of methanol in water is 20 % by volume. If the solution and pure methanol have densities of \( 0.964\text{ kg L}^{-1} \) and \( 0.793\text{ kg L}^{-1} \), respectively, find the per cent of methanol by weight?
The Henry's law constant for O\(_2\) dissolved in water is \( 4.34 \times 10^4\text{ atm} \) at certain temperature. If the partial pressure of O\(_2\) in a gas mixture that is in equilibrium with water is \( 0.434\text{ atm} \), what is the mole fraction of O\(_2\) in the solution?
Acetic acid dimerizes when dissolved in benzene. As a result boiling point of the solution rises by \( 0.36^\circ \text{C} \), when 100 g of benzene is mixed with "X" g of acetic acid. In this solution, if experimentally measured molecular weight of acetic acid is 117.8 and molar elevation constant of benzene is 2.57 K kg mol\(^{-1} \), what is the weight % and degree of dissociation (in %) of acetic acid in benzene?
Consider a $fcc$ lattice made of a metal cation (M$^{6+}$) and three oxide anions per unit cell. The resultant structure would have
The edge length of a solid possessing cubic unit cell is \( 2\sqrt{2}\,r \) (structure I), based on hard sphere model, which upon subjecting to a phase transition, a new cubic structure (structure II) having an edge length of \( \frac{4r}{\sqrt{3}} \) is obtained, where \( r \) is the radius of the hard sphere. Which of the following statements is true?
Which of the following is the correct unit of angular momentum of an electron in an orbital of an atom?
Maximum number of photons emitted by a bulb capable of producing monochromatic light of wavelength 550 nm is ______, if 100 V and 1 A is supplied for one hour.
An ideal gas "A" having volume of 1 L at 27 $^\circ$C is kept in a container having movable piston and adiabatic walls in ambient condition. If 1.33 L atm of energy is supplied inside the system, find out the final temperature of the system?
Carnallite is a mineral containing
An orange solid (A) on heating gives a green residue (B), a colourless gas (C) and water vapours. The dry gas (C) upon passing over heated Mg gave a white solid (D) which upon subsequent reaction with water gave a gas (E) that gave dense white fumes with HCl. Identify
On passing silent electric discharge through oxygen in an ozonizer, 5.5 mol % of oxygen is converted to ozone. How many moles of O$_2$ and O$_3$ result when 35 moles of O$_2$ is originally present?
PCl$_3$ is stored in a well stoppered bottle since
The donor atom in EDTA are
Hard acids prefer to combine with
Among the following, which species represents a pseudohalide?
The compound(s) that does(do) not exist is(are)
Rare gases are sparingly soluble in water because of
According to the VSEPR theory, the shape of ClO$_3^-$ would be
Acetic acid in liquid ammonia behaves as
An example of a non-stoichiometric oxide when heated is
The carbon atoms in calcium carbide are held by
Which of the following sets has Lewis acid behaviour for all the components?
Consider two parallel current carrying conductors separated by a distance. Which one of the following statements is true?
Consider a circular loop of radius R on the $xy$-plane carrying a steady current anticlockwise. The magnetic field at the center of the loop is given by