List of top Chemistry Questions

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 ?

Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of:

For the following reactions, equilibrium constants are given : $S\left(s\right)+O_{2}\left(g\right) $${\rightleftharpoons}$$SO_{2}\left(g\right); K_{1} =10^{52}$ $2S\left(s\right)+3O_{2}\left(g\right) $${\rightleftharpoons}$$2SO_{3}\left(g\right); K_{2} = 10^{129}$ The eqilibrium constant for the reaction, $2SO_{2}\left(g\right)+O_{2}\left(g\right)$${\rightleftharpoons}$$2SO_{3}\left(g\right)$ is :

$ {Mn_2(CO)_{10}}$ is an organometallic compound due to the presence of :

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?

If half-life of a substance is 36 minutes. Find amount left after 2 hrs. Initial amount 10 gm?

Which cannot behave as a nucleophile for S_N2 reaction?

The magnetic moment of Ni²⁺ ion (atomic number of Ni=28) in BM unit is

Which one of the following nitro compound does not react with nitrous acid?

An element with mass number 81 contains 31.7% more neutrons as compared to

How many ions obtain after dissociation of this complex [Co(NH₃)₆]Cl₃?

\( E=^0_{cr^{3+}/cr}=-0.72 V, E^0_{fe^{2+}/fe}=-0.42\) The potential for the cell  Cr|Cr³⁺(0.1 M) || Fe²⁺(o.01 M) Fe is

The main product obtained from phenol with PCl₅ is

2KHCO₃→CO₂ + H₂O find amount of gases formed (in lit.). When amount of KHCO₃ is 33 gm.

Glucose \(\underrightarrow{HCN}\,\,\,X\,\,\,\underrightarrow{Hydrolysis}\,\,\,\, Y\underrightarrow{Red P+HI}\,\,\,\, Z\) IUPAC name of Y and Z. 

Write the IUPAC name of given structure

Most common isotopes of hydrogen (non-radioactive) is

Final product C is

Which of the following statement is correct fro isotope of carbon?