Browse and search thousands of solved questions for your preparation.
Free questions with full explanations — locked behind signup to protect quality.
In hydrogen atom, what is the de Broglie wavelength of an electron in the second Bohr orbit? [Given that Bohr radius, $a_0 = 52.9$ pm]
When glycerol is treated with an excess of HI, it produces:
In a typical fuel cell, the reactants (R) and products (P) are:
Maximum number of electrons in a subshell with l = 3 and n = 4 is:
If the principal quantum number n=6, the correct sequence of filling of electrons will be:
The measurement of the electron position is associated with an uncertainty in momentum which is equal to $1 \times 10^{-18} \text{ g cm s}^{-1}$. The uncertainty in velocity of the electron will be: (mass of an electron is $9 \times 10^{-28} \text{ g}$)
What is the maximum number of orbitals that can be identified with the following quantum numbers? n = 3, l = 1, m = 0
The $E^\circ$ value for the $Mn^{3+}/Mn^{2+}$ couple is more positive than that of $Cr^{3+}/Cr^{2+}$ or $Fe^{3+}/Fe^{2+}$ due to change of:
Among the following, isoelectronic species are:
The cell reaction of an electrochemical cell is $Cu^{2+}(C_1) + Zn \rightarrow Cu + Zn^{2+}(C_2)$. The change in free energy will be the function of:
Among the following, the narrow spectrum antibiotic is :
Which of the following can be used as the halide component for Friedel-Crafts reaction?
The relation between $n_m$ ($n_m$ = number of permissible values of magnetic quantum number, $m_l$) for a given value of azimuthal quantum number ($l$) is:
Which of the chemical reagents can be used to distinguish between cis-cyclopenta-1,2-diol and trans-cyclopenta-1,2-diol?
Which one of the following pairs of species have the same bond order?
Which of the following is not the product of dehydration of the given alcohol?
Which one of the following ions has electronic configuration [Ar]3d⁶? (At. no: Mn = 25, Fe = 26, Co = 27, Ni = 28)
How many electrons can fit in the subshell for which n = 3 and l = 1?
In a regular octahedral molecule, $MX_{6}$, the number of $X–M–X$ bonds at 180º is:
Which is the correct order of increasing energy of the listed orbitals in the atom of titanium?