List of top Chemistry Questions

Oxygen molecule is

The solubility of $ AgCl $ is $ 1 \times 10^{-5}\, mol/L $ . Its solubility in $ 0.1 $ molar sodium chloride solution is

The $ pH $ of a $ 10^{-8} $ molar solution of $ HCl $ in water is

Freundlich adsorption isotherm is

Peptization denotes

Consider the following compounds: (i) $C_6H_5COCl$ The correct decreasing order of their reactivity towards hydrolysis is:

Which of the following will give a pair of enantiomers? (en $= NH_2CH_2CH_2NH_2$)

If $60\%$ of a first order reaction was completed in $60\, min$, $50\%$ of the same reaction would be completed in approximately ($log\, 4 = 0.60 \,log\, 5 = 0.69$)

The reaction of hydrogen an iodine monochloride is given as $H _{2( g )}+2 ICl _{( g )} \rightarrow 2 HCl _{( g )}+ I _{2( g )}$ This reaction is of first order with respect to $H _{2( g )}$ and $ICl _{( g )}$, following mechanisms were proposed Mechanism $A$: $H _{2( g )}+2 ICl _{( g )} \rightarrow 2 HCl _{( g )}+ I _{2( g )}$ Mechanism $B$ : $H _{2( g )}+ ICl _{( g )} \rightarrow HCl _{( g )}+ HI _{( g )} ;$ Slow $HI _{( g )}+ ICl _{( g )} \rightarrow HCl _{( g )}+ I _{2( g )} ;$ Fast Which of the above mechanism $(s)$ can be consistent with the given information about the reaction:

If there is no rotation of plane polarised light by a compound in a specific solvent, though to be chiral, it may mean that

An element, $X$ has the following isotopic composition; ${ }^{200} X : 90 \%$ ${ }^{199} X : 8.0 \%$ ${ }^{202} X : 2.0 \%$ The weighted average atomic mass of the naturally-occurring element $X$ is closest to:

With which of the following electronic configuration of an atom has the lowest ionisation enthalpy?

What will be the bond angle C-0-H in alcohol if hybridisation of C and O atom possess sp$^3$hybridisation?

Identify the correct order of the size of the following.

The colour of transition metal ions is due to presence of unpaired electron transitions in available empty electron in

Number of lone pair (s) in $ XeO{{F}_{4}} $ is/are

Which one of the following compounds has $ s{{p}^{2}} $- hybridisation?

Which of the following has the smallest number of molecules?

The decomposition of hydrogen peroxide can be slowed by the addition of acetamide. The latter acts as a

The starting material used in Solvas process are

In ${TeCl4}$ the central atom tellurium involves

Carbylamine reaction is given by aliph

The number of gram molecules of chlorine in $6.02 \times 10^{25}$ hydrogen chloride molecules is -