Assertion : Fe3+ can be used for coagulation of As2S3 sol.
Reason : Fe3+ reacts with As2S3 to give Fe2S3.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : K2Cr2O7 is used as primary standard in volumetric analysis.
Reason : It has a good solubility in water.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false.
C.
If assertion is true but reason is false
Potassium dichromate (K2Cr2O7) is preferred over sodium dichromate in volumetric analysis, because K2Cr2O7 is hygroscopic in nature and, therefore, accurate weighing is not possible in normal atmospheric conditions. A hygroscopic substance absorbs moisture from the atmosphere and this could lead to inaccuracies in weight.
Assertion: Sb2S3 is not soluble in yellow ammonium sulphide.
Reason : The common ion effect due to S2- ions reduces the solubility of Sb2S3
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Assertion : Zinc displaces copper from copper sulphate solution.
Reason : The E of Zn is -0.76 V and that of Cu is +0.34 V.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Pure iron when heated in dry air is covered with a layer of rust.
Reason : Rust has the composition Fe3O2.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false
The reaction of a primary amine with chloroform and ethanolic solution of KOH is called
Hofmann's reaction
coupling reaction
carbylamine reaction
Curtius reaction
Benzoic acid is treated with lithium aluminium hydride. The compound obtained is
benzaldehyde
benzyl alcohol
toluene
benzene
The polymer obtained by the interaction of ethylene glycol and terephthalic acid is
nylon
dacron
teflon
bakelite