31.

Extraction of gold and silver involves leaching with CN– ion. Silver is later recovered by

• Liquation

• Distillation

• Zone refining

• Zone refining

Extraction of gold and silver involves leaching with CN^– ion. Silver is later recovered by

• Liquation

• Distillation

• Zone refining

• Zone refining

Pick out the correct statement with respect
[Mn(CN)_6]^3–

• It is sp³d² hybridised and octahedral

• It is sp³d² hybridised and tetrahedral

• It is d²sp³ hybridised and octahedral

• It is d²sp³ hybridised and octahedral

Mixture of chloroxylenol and terpineol acts as

• Analgesic 

• Antiseptic

• Antipyretic

• Antipyretic

Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

Which one is the most acidic compound?

Which of the following statements is not correct?

• Insulin maintains sugar level in the blood of ahuman body

• Ovalbumin is a simple food reserve in egg-white

• Blood proteins thrombin and fibrinogen are involved in blood clotting

• Blood proteins thrombin and fibrinogen are involved in blood clotting

Predict the correct intermediate and product in the following reaction

Consider the reactions :

• A-Methoxymethane, X-Ethanoic acid, Y-Acetate ion, Z-hydrazine

• A-Methoxymethane, X-Ethanol, Y-Ethanoic acid, Z-Semicarbazide

• A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone

• A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone

Which one is the correct order of acidity?

• CH₂= CH₂> CH₃– CH = CH₂> CH₃– C ≡ CH > CH ≡ CH

• CH ≡  CH > CH₃– C ≡  CH > CH₂= CH₂> CH₃– CH₃

• CH ≡ CH > CH₂= CH₂> CH₃– C ≡  CH >CH₃– CH₃

• CH ≡ CH > CH₂= CH₂> CH₃– C ≡  CH >CH₃– CH₃