List of top Chemistry Questions

The molar solubility of CaF$_2$ (K$_{sp}$ = 5.3 × 10$^{-11}$) in 0.1 M solution of NaF will be
The non-essential amino acid among the following is:
The pH of 0.01 M NaOH (aq) solution will be
A compound is formed by cation C and anion A. The anions form hexagonal close packed (hep) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is :
Propene when treated with cold conc. $H_{2}SO_{4}$ forms a compound which on heating with water gives
The artificial sweetner stable at cooking temperature and does not provide calories is :
Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for:
The alkane that gives only one mono-chloro product on chlorination with $Cl_2$ in presence of diffused sunlight is :
For a reaction, activation energy E$_a$=0 and the rate constant at 200K is 1.6×10$^6$s$^{-1}$. The rate constant at 400K will be- [Given that gas constant] R= 8.314 J K$^{-1}$ mol$^{-1}$
Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant externalpressureof2bar Theworkdonebythe gas i s : [Given that 1Lbar= 100J)
If the rate constant for a first order reaction is k, the time(t) required for the completion of 99% of the reaction is given by :
In which case change in entropy is negative ?
Saccharin an artificial sweetener is manufactured from
During nitration of benzene, the attacking electrophile is
Mole of N2=0.4 and moles of O2=0.1. Find PN2. (Partial pressure) N2 =? At atmospheric pressure
What is hybridization of O in H2O?
Which of the following will not be formed when calcium formate?
Which cannot behave as a nucleophile for SN2 reaction?
If half-life of a substance is 36 minutes. Find amount left after 2 hrs. Initial amount 10 gm?
An element with mass number 81 contains 31.7% more neutrons as compared to
Which one of the following nitro compound does not react with nitrous acid?
How many ions obtain after dissociation of this complex [Co(NH3)6]Cl3?
The main product obtained from phenol with PCl5 is
The magnetic moment of Ni2+ ion (atomic number of Ni=28) in BM unit is
\( E=^0_{cr^{3+}/cr}=-0.72 V, E^0_{fe^{2+}/fe}=-0.42\) The potential for the cell  Cr|Cr3+(0.1 M) || Fe2+(o.01 M) Fe is