List of top Chemistry Questions

The outer electronic configuration of \(\text{Pd}^{2+}\) is
The correct statements with respect to dialysis of colloidal solution are:
I. Colloidal particles can pass through the membrane
II. Animal bladder can be used as membrane
III. Cellophane is not used as membrane
IV. Ions and small molecules can diffuse through membrane into water
1.8 g of glucose (molar mass 180 g/mol) is dissolved in 0.1 kg of water. The freezing point of the solution (in °C) is
(K$_f$ for water = 1.86 K kg mol$^{-1}$)
Assertion (A): Finely divided charcoal can act as an adsorbent
Reason (R): Finely divided material has small surface area
The molality and molarity of a solution of glucose in water which is labeled as 10% (w/w) are respectively (density of solution = 1.2 g/mL)
The ratio of effective number of atoms in a unit cell of fcc and bcc lattices is
If the rate of disappearance of N$_2$O$_5$ in the following reaction is 1.2 $\times$ 10$^{-5}$ mol L$^{-1}$ s$^{-1}$, the rate of production of NO$_2$ (in mol L$^{-1}$ s$^{-1}$) is
2N$_2$O$_5$ (g) $\rightarrow$ 4NO$_2$ (g) + O$_2$ (g)
A cubic lattice has A atoms at the body center, B atoms at the corners, C atoms at half of the face centers. The formula of the lattice is
The energy conversion involved in a galvanic cell is
The two stable isotopes of carbon present in the naturally occurring carbon are
In long form of periodic table, the d-block element which forms interstitial hydride is
The conjugate base of NH$_4^+$ is
Observe the following statements:
Statement A: In general, the ionization potential value decreases on moving down in the group.
Statement B: The 1\textsuperscript{st} ionization potential of sodium is greater than that of potassium.
Correct answer is
The bond order values of anions of sodium peroxide and potassium super oxide are respectively
The percentage of abundance of three elements X, Y and Z in the earth’s crust are about 27.7, 8.3 and 46.0 by mass respectively. X, Y and Z are
The major product ‘B’ of the following reaction sequence is
major product ‘B’ of the following reaction sequence is
Which of the following compounds do not have sp$^3$ carbon atom(s)?
I. Acetone\quad II. Acetic acid\quad III. Buta-1,3-diene\quad IV. Propyne\quad V. Naphthalene
Among the ions O$^{2-}$, Na$^+$, F$^-$, N$^{3-}$, Mg$^{2+}$ the ions with smallest and largest radii are respectively
Which of the following conditions are not suitable for a spontaneous reaction?
For the formation of NH$_3$(g) from its constituent elements, which of the relation between the reaction quotient (Q) and equilibrium constant (K$_c$) is correct for the backward reaction?
Which of the following does not show disproportionation reaction?
The ratio of rate of diffusion of SO$_2$ to CH$_4$ is
The frequency band for uplink satellite communication in the following is
The ratio of radii of second orbit of hydrogen atom to fourth orbit of He$^+$ ion is
The velocity of the electron in Bohr’s first orbit is \( x \times 10^6 \, \text{ms}^{-1} \). The deBroglie wavelength associated with it (in nm) is (Given: \( m_e = 9 \times 10^{-31} \, \text{kg}, \, h = 6.6 \times 10^{-34} \, \text{Js} \))