Board Paper of Class 12-Science 2019 Chemistry Delhi(Set 2) - Solutions
General Instructions:
(i) All questions are compulsory
(ii) Section A : Q. no. 1 to 5 are very short-answer questions and carry 1 mark each.
(iii) Section B : Q. no. 6 to 12 are short-answer questions and carry 2 marks each.
(iv) Section C : Q. no. 13 to 24 are also short-answer questions and carry 3 marks each.
(v) Section D : Q. no. 25 to 27 are long-answer questions and carry 5 marks each.
(vi) There is no overall choice. However, an internal choice has been provided in two questions of one mark, two questions of two marks, four questions of three marks and all the three questions of five marks weightage. You have to attempt only one of the choices in such questions.
(vii) Use log tables if necessary. Use of calculators is not allowed.
- Question 1
Why are medicines more effective in colloidal state?
ORWhat is difference between an emulsion and a gel?
VIEW SOLUTION
- Question 2
Arrange the following in increasing order of base strength in gas phase:
(C2H5)3N, C2H5NH2, (C2H5)2NH
VIEW SOLUTION
- Question 3
Why conductivity of silicon increases on doping with phosphorus? VIEW SOLUTION
- Question 4
What is the basic structural difference between glucose and fructose?
OR
Write the products obtained after hydrolysis of lactose. VIEW SOLUTION
- Question 5
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