Question

SECTION – B (CHEMISTRY) Q. (1)          Assertion reason type question.                                                                                                                                                                                                                                                                                                                                      (2½)  Direction-These questions consist of two statements, each printed as assertion and reason, while answering questions, you are required to choose any one of the following five responses. (a)    If both assertion and reason are correct and the reason is a correct explanation of the Assertion. (b)    If both assertion and reason are correct but reason is not correct explanation of the assertion (c) If the assertion is correct but reason is incorrect. (d) If the assertion is incorrect but reason is correct (e) If both the assertion and reason are incorrect.   (1)     Assertion-Oxygen is an element                                                                                                                                 Reason- It cannot be decomposed by physical and chemical process. (2)     Assertion- Water and acetone are immiscible liquids.                                                                                                    Reason-It can be separated by using separation funnel. (3)     Assertion- Mixture of sugar and water is an example of solution.                                                                         Reason- It can be separated by filtration method. (4)     Assertion- A mixture does not have a fixed boiling point.                                                                           Reason-The properties of constituent particle are retained in mixture. (5)     Assertion- Melting of a ice is a physical change.                                                                                                     Reason- In a physical change new substance is formed. Q. (2)  Choose the correct option.                                                                                                                                                                                                                                                                                                                                                                          (1½) 1)         When a liquid is spun rapidly than denser particles are forced to the bottom and the lighter particle stay at the top. This principle is used in.                                                                          (a)    Centrifugation         (b) Fractional distillation         (c) Evaporation          (d) Tunneling.                                                                                              OR If we put camphor in an open container its amount keeps on decreasing due to the phenomenon of  (a) Evaporation  (b) precipitation   (c) Condensation  (d) Sublimation. 2)         Tincture of iodine find the solute and solvent                                                                      (a)    alcohol is the solute and iodine is solvent                (b) iodine is the solute and alcohol is the solvent (c) any component is considered as solute and solvent. (d) tincture of iodide is not a solution.      3)  The amount of solute present per unit volume or per unit mass of the solution is known as  (a) composition of solute                                                       (b) concentration of solvent. (c) concentration of a solute                                                 (d) concentration of a solution.     Q.(3)  Why is air considered as a mixture and not compound ?                                                                                                      OR   Why is crystalline better than evaporation. ?     ​

Answer 1

Answer:

toooo big but also I will tell

Explanation:

1 c

2 b

3a

Answer 2

Answer:

very big question

Explanation:

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