CBSE 11th Standard Chemistry Subject Value Based Questions 2 Mark Questions With Solution 2021
By QB365 on 31 May, 2021
QB365 Provides the Value Based Questions Papers for Class 11 Chemistry, and also provide the detail solution for each and every Value Based Questions. Value Based Questions will help to get more idea about question pattern in every exams and also will help to get more marks in Exams
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CBSE 11th Standard Chemistry Subject Value Based Questions 2 Mark Questions With Solution 2021
11th Standard CBSE
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Reg.No. :
Chemistry
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What do you mean by hydrogen economy? How can it be helpful for our society?
(a) -
A student wants to verify the law of conservation of mass in laboratory. He prepared 10% aqueous solution of MgSO 4 and MgCI2. He mixed 10 ml of both in a beaker. He weighed the flask on a balance. After some time he weighed again. There was no change in mass. Answer the following questions given below:-
(i) Was the student able to verify the law of conservation of mass? What was his mistake?
(ii) What is the value associated with it?(a) -
(i) State the Heisenberg's uncertainty principle.
(ii) Write down the significance of Heisenberg principle.
(iii) Do you think it has utility in your daily life? Justify your answer(a) -
(i) What is the basis of classification to the classification of modern periodic table?
(ii) Can you apply the concept of periodic classification to the students in a class?
(iii) What is the value associated with it?(a) -
Ionic compounds have high melting and boiling points. There is strong electrostatic force of attraction between them. Answer the following:
(i) Why ionic solids are poor conductor of electricity?
(ii) What happens to the electrical conductivity when they are dissolved in water?
(iii) What is the value associated with it?(a)
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CBSE 11th Standard Chemistry Subject Value Based Questions 2 Mark Questions With Solution 2021 Answer Keys
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The basic principle of hydrogen economy is the transpiration and storage of energy in the form of liquid or gaseous dihydrogen. It can be used in fuels cells for generation of electric power. It can be used as non-polluting fuel in near future.
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(i) No, he could not verify the law of conservation of mass. No chemical reaction takes place between MgSO4 and MgCl2.
(ii) While doing the experiment one should understand the concept that reactants should react chemically. MgS04 can react with other salt. -
(i) According to Heisenberg, it is not possible to measure simultaneously the position and the momentum of a microscopic particle with absolute accuracy.
(ii) It has significance for microscopic particles. After his principle both wave and particle nature were considered and quantum mechanics was developed.
(iii) It has no impact on our daily life. It applies only to the moving microscopic particles which we cannot see with our eyes. -
(i) Atomic no. of the element is the basis of classification of modern periodic table.
(ii) Students can be divided on the basis of their grasping capacity in class.
(iii) Classification can be applied in class and special attention can be paid to the students who are weak in studies. -
(i) In solid form they are (anions & cations) closely packed, that is why they are not able to move.
(ii) In water they aquire mobility and can conduct electricity.
(iii) By this property these compounds can be applied in electroplating of all types of cells.
