List of top Chemistry Questions asked in COMEDK UGET

The numbers of $ {H^+}$ ions present in 1 mL of a solution whose pH is 13

A mixture of methylamine and dimethylamine is given to you. The reagents used to separate the components of the mixture are

Pick the incorrect statement among those given below.

Which of the following compounds is responsible for depletion of ozone layer?

Sulphur sol is an example of

The decreasing order of reactivity towards electrophilic substitution of the following compounds is

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 decreasing order of stability of oxides of halogen is

Which of the following equations give ionic product of water? (i) $ { NH_{3(aq)} + H_2 O <=> NH^+_{4(aq)} + OH^{-}_{(aq)}}$ (ii) $ { NH^+_{4(aq)} + H_2 O <=> H_3O^+ + NH_{3(aq)}}$ (iii) $ { NH^{-}_{2(aq)} + H_2 O <=> NH_{3(aq)} + OH^-}$ (iv) $ { NH_{3(aq)} + OH^{-}_{(aq)} <=> NH^{-}_{2(aq)} + H_2O}$

The mass of oxygen gas which occupies $5.6$ litres at STP would be

Sodium rosinate is generally added in the soap because it

$Nylon-6,6$ is an example of a polymer formed by

The cathode reaction in the dry cell will be

The correct increasing order of basic strength of following amines, $ {C2H5NH2, NH3, (C2H5)2NH, C6H5NH2}$ in gaseous state is

The magnetite ore is

For an adiabatic change in a system, the condition which is applicable will be

An endothermic reaction is found to have $+ve$ entropy change. The reaction will be

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?