List of top Chemistry Questions

Heating of carbonate ore in absence of air is called

Which of the following metals is least reactive?

Match the following

a	Haematite	i	\(HgS\)
b	Cinnabar	ii	\(Fe_3O_4\)
c	Hornsilver	iii	\(Fe_2O_3\)
d	Magnetite	iv	\(AgCl\)

The bond angle in H₂O molecule is HO

The shape of molecule with 4 bond pairs and zero lone pair is 4

'Sigma bond' is formed by

Element 'A' forms tripositive ion and element 'B' forms dinegative ion. The chemical formula of the compound formed with A and B will be

Total number of elements in Newland's periodic table is

The orbital with highest penetration power is

Mendeleeff's periodic table is based on

According to Linus Pauling, the electronegativity values are based on

Relative lowering of vapour pressure of a dilute solution of glucose dissolved in 1 kg of water is 0.002. The molality of the solution is

Addition of excess of AgNO3 to an aqueous solution of 1 mole of PdCl2. 4NH3 gives 2 moles of AgCl. The conductivity of this solution corresponds to

$3.6$ gram of oxygen is adsorbed on $1.2\, g$ of metal powder. What volume of oxygen adsorbed per gram of the adsorbent at $1\,atm$ and $273 \,K$ ?

$50\, mL$ of $0.02\, M \,NaOH$ solution is mixed $50\, mL$ of $0.06 \,M$ acetic acid solution, the $pH$ of resulting solution is $\left( p K_{a}\right.$ of acetic acid is $4.76, \log 5=0.70$ )

The number of species of the following that can act both as Bronsted acids and bases is $HCl , ClO _{4}^{-},{ }^{-} OH , H ^{+}, H _{2} O , HSO _{4}^{-}, SO _{4}^{2-}$, $H _{2} SO _{4}, Cl ^{-}$

\({A->[K_2Cr_2O_7][dil.H_2SO_4]B->[CH_3MgI][H_2O]CH3}\) the reactant A is

Which of the following carbohydrates are branched polymer of glucose

The volume strength of $1 \,M H _{2} O _{2}$ is (Molar mass of $\left. H _{2} O _{2}=34 \,g\, mol ^{-1}\right)$

What is the value of γ for a monoatomic gas (ideal gas):

$aK _{2} Cr _{2} O _{7}+ bKCl + cH _{2} SO _{4} \longrightarrow xCrO _{2} Cl _{2}+ yKHSO _{4}+ zH _{2} O$ The above equation balances when

The electronic configuration of $Eu$ (Atomic $No. 63$), $Gd$ (Atomic $No. 64$) and $Tb$ (Atomic $No. 65$) are :

Which of the following element has the highest ionisation enthalpy?

General formula of solid in zinc blende structure is: