List of top Chemistry Questions asked in BCECE

Difference between $S$ and $ S^{2-} $ as $ S^{2-}$ has

Number of atoms of $He$ in $100\, u$ of $He$ (atomic wt of $He$ is $4$) are

$ C{{H}_{3}}C{{H}_{2}}Cl $ undergoes homolytic fission, produces

$ C-C $ bond order in benzene is

Ozone is used for purifying water because

Carbolic acid is

Which one of the following is a correct statement?

Which one of the following shows maximum value of paramagnetic behaviour?

For the reaction, $H _{2}+ I _{2} \rightleftharpoons 2 HI$, the equilibrium concentration of $H _{2}, I _{2}$ and $HI$ are $8.0, 3.0$ and $28.0 \,mol / L$ respectively. The equilibrium constant is

The solubility product of $ BaC{{l}_{2}} $ is $ 4\times {{10}^{-9}}. $ Its solubility in mol/L is

Which one of the following is a conjugated protein?

The wavelength of the first spectral line of sodium is $5896 \,??. The first excitation potential of sodium atom will be $\left(h=6.63 \times 10^{-34} \,Js \right)$

The chemical formula of plaster of Paris is

Which one of the following has square planar structure?

Zinc and cold dil. $ HNO_3$ reacts to produce

Tincture of iodine is

Methyl- $\alpha$ -D-glucoside and methyl $\beta$ -D-glucoside are

Addition of $ SnC{{l}_{2}} $ to $ HgCl_2$ gives precipitate:

In fermentation by zymase, alcohol and $ C{{O}_{2}} $ are obtained from:

Which will reduce zinc oxide to zinc?

By Wurtz reaction, a mixture of methyl iodide and ethyl iodide gives :

Some chemists at ISRO wished to prepare a saturated solution of a silver compound and they wanted it to have the highest concentration of silver ion possible. Which of the following compounds, would they use? $K_{s p}( AgCl )=1.8 \times 10^{-10} $ $K_{s p}( AgBr )=5.0 \times 10^{-13} $ $K_{s p}\left( Ag _{2} CrO _{4}\right)=2.4 \times 10^{-12}$

The stability of ferric ion is due to:

Which reagent can convert acetic acid into ethanol ?

When $ C{{H}_{3}}COOH $ reacts with $ C{{H}_{3}}-MgX: $