No products in the cart.

. (i) Give two industrial applications …

CBSE, JEE, NEET, CUET

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

. (i) Give two industrial applications of distillation under reduced pressure. (ii) Why is it necessary to use acetic acid and not hydrochloric acid for acidification of sodium extract for testing sulphur by lead acetate test?

Posted by Slr Teja 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Naveen Sharma 7 years, 2 months ago

Ans. (i)Distillation Under Reduced Pressure is used for purifying or separating thermally unstable liquid compounds.

Uses :

In Petroleum Refining
in food processing

(ii) For testing of sulphur present in the organic compound, the Lassaigne’s extract is acidified with acetic acid (CH₃COOH) and not sulphuric acid because lead acetate is soluble and does not interfere with the test. If sulphuric acid (H₂SO₄ ) is used, lead acetate will react with H₂SO4 itself to form white ppt. PbSO_4.

ANSWER

http://mycbseguide.com/examin8/

Related Questions

If the value of n+l is more than 3 and less than 6, what will be the possible number of orbitals

Posted by Neeraj Pandey 3 weeks ago

CBSE > Class 11 > Chemistry

0 answers

If all the oxygen atoms from a mixture of 2 moles of H2P2O7, 54 gm H2O and 98 gm H2SO4 are taken and converted into O3 then the number of Ozone gas formed will be

Posted by Videet Shelar 1 week, 6 days ago

CBSE > Class 11 > Chemistry

0 answers

Convert 2.5 km/M to m/s

Posted by Pari 123 6 days, 3 hours ago

CBSE > Class 11 > Chemistry

1 answers

The density of 3 M solution of NaCl is 1.25 g mL^-1. Calculate molality of the solution

Posted by Mandeep Kaur 1 week, 4 days ago

CBSE > Class 11 > Chemistry

1 answers

How were cathode rays discovered Class 11(a) cathode ray travel in straight line (b) cathode rays consist of material particle (c) cathode rays consist of negative charge particle

Posted by Vivek Prajapat 1 month, 1 week ago

CBSE > Class 11 > Chemistry

1 answers

Consider the element Cs,Ne,I and F (A) identify the element that exhibits only negative oxidation state (B)identify the element that exhibits only postive oxidation state (C)identify the element that exhibits only postive and negative oxidation state (D)identify the element which exhibits neither the negative nor does the positive oxidation

Posted by Govind Jat 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Given that abundance of isotopes of Fe54 ,Fe 56, Fe 57 are 5%, 90%, 5% respectively. Find the avarage atomic number of Fe

Posted by Sohan Reddy 2 weeks, 2 days ago

CBSE > Class 11 > Chemistry

0 answers

Numerical of chapter 2 NCRT

Posted by Tulsi Sahu 1 month, 2 weeks ago

CBSE > Class 11 > Chemistry

0 answers

What do you understand by exothermic reaction and endothermic reaction? Give one example of each type. 19- Calculate: Number of gram atoms in 1.4 grams of nitrogen. (Atomic mass, N = 14) 20- Draw the structure of the following compounds all showing C and H atoms. (a) 2-methyl -3-isopropyl heptane (b) Dicyclopropyl methane.

Posted by Madhav Namdev 1 month, 2 weeks ago

CBSE > Class 11 > Chemistry

2 answers

What are major differences between metals and non-metals

Posted by Aastha Tiwari 3 weeks, 5 days ago

CBSE > Class 11 > Chemistry

2 answers

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

Test Generator

Test Generator

Create papers online. It's FREE.

CUET Mock Tests

CUET Mock Tests

75,000+ questions to practice only on myCBSEguide app

Google Play

Download myCBSEguide App