Download CBSE Class 11th Solved Chemistry practice paper for the coming class 11 Chemistry exam 2017. All the questions of this practice paper are from latest CBSE syllabus.
In order to score maximum marks in CBSE class 11 Chemistry exam, students should start solving practice papers.
In this article, we have provided a practice paper for CBSE Class 11th Chemistry. Most of the questions of this practice paper are based on important concepts of NCERT textbooks and previous year papers of different CBSE schools. These questions are very important for coming Class 11th Chemistry exam 2017. Students should try to solve this paper in less than 3 hours as this will enhance their writing speed.
General instructions for solving the practice paper
(i) All questions are compulsory.
(ii) Questions number 1to 5 are very short answer questions and carry 1 mark each.
(iii) Questions number 6 to 10 are very short answer question and carry 2 marks each.
(iv) Questions number 11 to 22 are also short answer question and carry 3 marks each.
(v) Question number 23 is a value based question and carry 4 marks.
(vi) Questions number 24 to 26 are long answer question and carry 5 marks each.
(vii) Use log tables, if necessary. Use of calculators is not allowed.
Some Sample Questions from paper
Question: What is the reason of diagonal relationship?
Sol:
Elements having similar size of atoms or ions, similar electronegativity or similar polarising power shows diagonal relationship. For example, Li and Mg, and Be and Al have many similar properties.
CBSE Syllabus Class 11: Academic Session 2016 – 2017
Question: What is syngas?
Sol:
It is mixture of CO and H2.
Question: How will you separate iodine from sodium?
Sol:
It can be done by the process of sublimation.
Question: What are sources of dissolved oxygen in water?
Sol:
Photosynthesis, Natural Aeration.
Question: What elements of group 13 form amphoteric hydroxide?
Sol:
Al and Ga.
Question: Amongst alkali metals, why is lithium regarded as most apt reducing agent in aqueous solutions?
Sol:
In all alkali metals, Li + has the smallest size and hence has the highest hydration energy. In other words, Li has the lowest electrode potential (E° = ‒ 3.04 V), i.e., it has the maximum tendency to lose electrons and hence is the strongest reducing agent amongst alkali metals.
Question: The second ionization enthalpy of calcium is more than that the first and yet calcium forms and not. Why?
Sol:
The higher enthalpy of lattice formation by Ca2+ions more than compensates the higher second ionization enthalpy of calcium.
Question: What angles are associated with the sp and sp2 orbitals?
Sol:
sp = 180o and sp2 = 120o.
