Jagranjos brings CBSE Class 10 Chemistry (Science) Practice Paper 2017-2018 to help students prepare for the periodic tests as well as for the Board Examinations 2018. Questions asked in this practice paper will not only help students get an idea of the important topics to be prepared, but will also help them in understanding the depth with which these topics should be studied.
This year as per the CBSE’s remodeled assessment structure which has made the CBSE Class 10 Board exams mandatory, the assessment scheme will have an 80 marks component for class 10 Board examination in all scholastic subjects along with a 20 marks component of Internal Assessment (IA).
To do well in the changed exam structure students must have a good hold over the important topics and questions for which solving more and more practice papres is the best way.
Few sample questions from the Question Paper are given below:
Q. How does the metallic character of the elements of group I changes as we if we move downwards.
Q. What is the reason that carbon atom forms only covalent compounds?
Q. Discuss the variance of valency and metallic character of elements when moving from left to right in a period?
Q. What do you mean by the functional group present in an organic compound. Write the formula of the functional group present the following compounds:
(d) Carboxylic acid.
Q. A carboxylic acid (molecular formula C2H4O) reacts with an alcohol in the presence of an acid catalyst to form a compound 'X'. The alcohol on oxidation with alkaline KMnO4 followed by acidification gives the same carboxylic acid C2H4O2. Identify the carboxylic acid, alcohol and the compound 'X' and write the structure of each.
Q. A carboxylic acid (molecular formula C2H4O) reacts with an alcohol in the presence of an acid catalyst to form a compound ‘X’. The alcohol on oxidation with alkaline KMnO4 followed by acidification gives the same carboxylic acid C2H4O2. Identify the carboxylic acid, alcohol and the compound ‘X’ and write the structure of each.
Q. State the properties of carbon which enable it to form a large number of compounds. Also state the type of bonding found in most of its compounds.
Give reason why the carbon compounds
(i) Generally have low melting and boiling points.
(ii) Do not conduct electricity in molten state.
Q. while studying saponification reaction for the preparation of soap, the teacher suggested to a student to add a small quantity of common salt to the reaction mixture. The function of comnnon salt in this reaction is to:
(a) Reduce the alkalinity of the soap
(b) Reduce the acidity of the soap
(c) Enhance the cleansing capacity of soap
(d) Favour precipitation of soap.
|Click Here, To Get the Complete Practice Paper|
DISCLAIMER: JPL and its affiliates shall have no liability for any views, thoughts and comments expressed on this article.