Home
News
Colleges
Courses
Admission
Lectures
Online Test
Past Papers
Date Sheets
Results
Study Abroad
Jobs
Tutors
More
Apps
Online Short Questions For Chapter 12 "12th Class Chemistry Chapter 12 Short Questions Preparation "
Try The Short Questions For 12th Class Chemistry Chapter 12 Short Questions Preparation
-
Total Questions10
-
Available Sets3
Chemistry - 12th Class Chemistry Chapter 12 Short Questions Preparation
Question # 1
Explain one method of formation of formaldehyde form methyl alchohol.
- Ans 1: Formaldehyde is prepared in laboratory by passing a mixture of methyl alcohol vaporous and air over plantinized asbestos or copper or silver catalyst at 300 C.Acetaldehyde is prepared in laboratory by the oxidation of ethyl alchohol with acidified sodium dichromate solution.
12th Class Chemistry Chapter 12 Short Questions Preparation - Set 1
Question # 1
Explain one method of formation of formaldehyde form methyl alchohol.
- Ans 1: Formaldehyde is prepared in laboratory by passing a mixture of methyl alcohol vaporous and air over plantinized asbestos or copper or silver catalyst at 300 C.Acetaldehyde is prepared in laboratory by the oxidation of ethyl alchohol with acidified sodium dichromate solution.
12th Class Chemistry Chapter 12 Short Questions Preparation - Set 2
Question # 1
What is Tollen's Test?
- Ans 1: Aldehydes form silver mirror with Tollen's reagent (ammonical silver nitrate solution).Add tollen's reagent to an aldehyde solution in a test tube and warm,A silver mirror is formed on the inside of the test tube.
12th Class Chemistry Chapter 12 Short Questions Preparation - Set 3
Question # 1
How acetals are formed?
- Ans 1: Acetaldehyde combine with alcohols in the presence of hydrogen chloride gas to form acetyl,The hydrogen chloride gas acts a catalyst .Both the alcohol and the hydrogen chloride gas must be dry.
12th Class Chemistry Chapter 12 Preparation
Here you can prepare 12th Class Chemistry Chapter 12 (Aldehydes and Ketones). Click the button for 100% free full practice Preparation.
