List of top Chemistry Questions asked in KEAM

The correct order of metallic character of the following elements is
Which of the following statement is incorrect about bond order?
What is the mass of the substance 'X' required to prepare 250 mL of 0.5 molar aqueous solution? (Molar mass of 'X' is \(40 \mathrm{g} \mathrm{mol}^{- 1}\))
The orbital described by the quantum numbers \(\mathrm{n} = 4\) and \(l = 2\) is
A 150 watt bulb emits monochromatic light of wavelength 662 nm. How many number of photons emitted per second by the bulb? (Planck's constant, \(\mathrm{h} = 6.62 \times 10^{- 34} \mathrm{~J} \mathrm{~s}, \mathrm{~c} = 3 \times 10^{8} \mathrm{~m} \mathrm{~s}^{- 1}\))
If 2E is the kinetic energy of a moving particle of mass \(m\), then the wavelength of the de Broglie wave associated with it is
If light waves of wavelengths \(\lambda\) and \(\lambda/3\) are incident on the surface of a material, photoelectrons are emitted with maximum kinetic energy E and 4E respectively, then the work function of the material is
If light waves of wavelengths \(\lambda\) and \(\lambda/3\) are incident on the surface of a material, photoelectrons are emitted with maximum kinetic energy \(E\) and \(4E\) respectively, then the work function of the material is
The product of uncertainty in position \((\Delta x)\) and uncertainty in velocity \((\Delta v)\) has the unit of
In the following reaction, the change in oxidation state of Magnesium is: 3Mg(s) + N2(g) → Mg3N2(s)
If the threshold wavelength of a photoelectric material lies in the green light region, then which one of the following light will not emit photoelectrons?
Which one of the following molecules is nonpolar?
If T and \(\eta\) are the surface tension and coefficient of viscosity of a liquid, then with the increase of temperature
The following amines are having same molecular masses. (i) n-C\(_4\)H\(_9\)NH\(_2\) (ii) (C\(_2\)H\(_5\))\(_2\)NH (iii) C\(_2\)H\(_5\)N(CH\(_3\))\(_2\). The correct order of boiling point of the above amines is
Aniline on treatment with NaNO\(_2\) and HCl at 278K gives compound (Y). When the compound (Y) is treated with Cu/HBr, compound 'Z' is obtained. The compound 'Z' is
Carbylamine is obtained when aniline is
Acetone can be converted into 2-methylpropan-2-ol using
Which of the following is the weakest acid?
Which of the following carboxylic acid is used in the manufacture of nylon-6,6?
Lucas reagent is
The reagent/s employed in Etard reaction is/are
Phenetole is
Which of the following compound does not exhibit aromaticity?
The ortho-, para-directing and deactivating group in aromatic electrophilic substitution reaction is
An optically active compound among the following is