The correct option is (C) because$Na_2O_2 + H_2O \longrightarrow NaOH + H_2O_2$We have ions $Fe^{2+}...

A common nitrate test, known as the brown ring test can be performed by adding iron(II) sulfate to a...

Toolbox: Turn bull's blue is Ferrous-ferricyanide $Fe_3[Fe(CN)_6]_2$   Answer...

The white ppt. obtained with $H_2SO_4$ is that of $PbSO_4$. The white crystalline may be that of $Pb...

Answer: $CdS$ and $As_2S_3$   Since $CdS$ belongs to II A group and $As_2S_3$ belongs to ...

Lyophobic colloids are electrically charged, relatively unstable and tend to change into a suspensio...

Answer: Egg albumin sol in water   Egg albumin sol, if boiled, will coagulate due to den...

For dissolution of an ionic solid in water $\Delta_{sol}H^{\Theta} = \Delta_{lattice}H^{\Theta}$ +...

Answer: the solution is aqueous   If the solution is aqueous i.e. it does not contain any...

Answer:  of the oxidation of $H_2S$ gas by some acid radical   $H_2S + [O] \longrigh...

Answer: $I^-$ ion   $NaI + Cl_2 \longrightarrow 2NaCl + I_2$        ...

Answer: $Na(NH_4)HPO_4.4H_2O$   Microcosmic salt $Na(NH_4)HPO_4.4H_2O$, besides borax, is...

Answer: None of these   In $KMnO_4$ titrations, $KMnO_4$ itself acts as an indicator.

Answer: Yellow The related dye called aniline yellow is produced from the reaction of aniline...

Answer: 4-5   Coupling of Benzene diazonium chloride and aniline is done under acidic con...

Answer: $K_2SO_4.Al_2(SO_4)_3.24H_2O$ Potash Alum has the chemical formula $K_2SO_4.Al_2(SO_4)_...

Answer: $NaHCO_3$ test Phenols also turn blue litmus red just like carboxylic acids. However, pheno...

Only Ethanol gives this test since it contains the group $CH_3CO-$ Answer: Iodoform test Ethan...

Answer: Fehling's solution test Fehling's solution test is given by alliphatic aldehydes only an...

Aldehydes & ketones both contain the carbonyl group, >C=O, but in aldehydes the carbonyl grou...

Answer: None of these   Methyl salicylate is an organic ester naturally produced by many ...

In the absence of carbon in the organic compound in Lassigne's test, NaCN is not formed as a produ...

Answer: decrease in enthalpy and decrease in entropy   Adsorption is accompanied b...

Answer: cloud   Clouds are water dispersed in air.  

Answer: reduction   Oils are esters of unsaturated fatty acids whereas Dalda is es...

Toolbox: Flocculation value = $\frac{\text{1}}{\text{Coagulating Power}}$ Answer: ...

Answer: oxidation of oxalic acid by acidified $KMnO_4$   $Mn^{2+}$ ions produced i...

Answer: Mixing the sols has no effect   As the two sols are oppositely charged mix...

Toolbox: A gas which is easy to liquify, is most readily adsorbed.   Answ...

Answer: Cetyltrimethylmmonium bromide   Cetyltrimethylmmonium bromide, $C_{16}H_{3...

Answer: $NH_3>CO_2>CH_4>H_2$   A gas which is easy to liquify is most ads...

Toolbox: Non-electrolytes cannot cause coagulation.   Answer: Non-electro...

Answer: Aluminium nitrate   $As_2S_3$ is a negatively charged sol. As such $Al^{3+...

Answer: Gold   Gold colloid can be prepared by Bredig arc method as well as by red...

Answer: Glucose   Glucose does not produce any ions when dissolved in water. So ne...

Answer: Liquid is dispersed in a liquid   Milk is an (colloid) emulsion in which l...

Answer: Acid hydrolysis of methyl acetate.   In the acid hydrolysis of methyl acet...

Toolbox: CMC (Critical miscellization concentration) is the concentration at which miscell...

Answer: 25   Gold number is the weight of protective colloid in milligrams which p...

Answer: both magnitude and sign of charge   The ability of ion to bring about coag...

Answer: the formation of electrical layer between two phases   The dispersed phase in a ...

Toolbox: Electrodialysis (ED) is used to transport salt ions from one solution through ion-exchan...

Answer: positive charge   AgI colloidal particles adsorb common ion $Ag^+$ from ex...

Answer: Coagulation   Alum is a double sulphate of potash and aluminium, and in th...

Answer: $K_4[Fe(CN)_6]$   According to Hardy Schulze rule, the ion having opposite...

Answer: layer of dispersion medium on their particles   Hydrophilic colloids: Thes...

Toolbox: At high pressure adsorption is independent of pressure i.e. , $\frac{x}{m} \propt...

Toolbox: In chemiadsorption effect of pressure is not given by Freundlich adsorption isoth...

Answer: All the above are correct for different ranges of pressure.   According to...

Answer: Physical Adsorption   Physical adsorption takes place at low temperature b...