List of top Chemistry Questions asked in COMEDK UGET

The decreasing order of reactivity towards electrophilic substitution of the following compounds is
$Nylon-6,6$ is an example of a polymer formed by
The cathode reaction in the dry cell will be
Strongest reducing agent among the following is (i) $ {Na^+ + e^- ->Na_{(s)} \:\: E^{\circ} = - 2.71 \, V}$ (ii) $ {Al^{3+} + 3e^- ->Al_{(s)} \:\: E^{\circ} = - 1.66 \, V}$ (iii) $ {F_{2(g)} + 2e^- ->2F^- \:\: E^{\circ} = + 2.87 \, V}$ (iv) ${2H_2 O+ 2e^- ->H_{2(g)} + 2OH^-_{(aq)} \:\: E^{\circ} = - 0.83\, V}$
The correct increasing order of basic strength of following amines, $ {C2H5NH2, NH3, (C2H5)2NH, C6H5NH2}$ in gaseous state is
The magnetite ore is
For one mole of $ {NaCl_{(s)}}$ the lattice enthalpy is
$ {Pb_3 O_4 + 4HNO_3 -> 2Pb(NO_3)_2 + PbO_2 + 2H_2O }$ Which is true about the lead ions in $ {Pb_3O_4}$ ?
Which of the following pairs has the same size?
Which of the following chemicals does not liberate hydrogen gas on reaction with aluminium metal?
In the metallurgy of aluminium when the fused matrix is electrolyzed, the overall reduction reaction is
Hybridized state of bromine in bromine pentafluoride is
Carbon monoxide forms volatile compound with
An element belonging to chalcogen group is
Energy associated with the first orbit of $ {He^+}$ is
The radius of an atom is $300\,pm$. If it crystallizes in a face-centered cubic lattice, length of the edge of the unit cell is
Sodium dissolves in liquid $NH_3$ to give a deep blue solution. This is due to
A 150 watt bulb emits light of wavelength 6600 $?$ and only 8% of the energy is emitted as light. How many photons are emitted by the bulb per second?
Schottky defect in crystals is observed when
In the following sets of ions, which one is not isoelectronic with the rest of the species? $ { O^{2-}, F^- , Na, Mg^{2+}, Al^{3+}, Ne} $
The reaction, $ { CH_3CH_2I + KOH_{(aq)} -> CH_3CH_2OH + KI}$ is classified as
For $S_N1$ reaction, the order of reactivity of haloalkanes is
An orbital with $n = 3, l = 1$ is designated as
A crystalline solid has $A^-$ ions at the corners and face centres whereas $B^+$ ions are at the body centre and edge centres of the unit cell. The simplest formula of the compound will be
One mole of $PCl_5$ is heated in a closed 2 $dm^3$ vessel. At equilibrium 40% $PCl_5$ is dissociated. Calculate the equilibrium constant.