CBSE Class 10 Science Question Paper Solved 2021 Set C

SECTION A   1. What is the nature and size of the image formed by a concave mirror if the magnification produced by the mirror is +3?   2. Which gas is evolved when sodium hydrogen carbonate is treated with dil.hydrochloric acid?    3. What change in colour is observed when…

CBSE Class 10 Science Question Paper Solved 2021 Set B

SECTION A   1 Which is the cell organelle present in guard cell is absent in epidermal cell?    2 Why regeneration is not considered as same as reproduction in most organisms?    3 Two elements X and Y have electronic configuration 2,8,1 and 2,8,7 respectively. Name the family…

CBSE Class 10 Science Question Paper Solved 2021 Set A

SECTION A   1 Name the cells that surround a stoma in leaf.    2 How does Spirogyra reproduce?    3 The atomic numbers of three elements X,Y& Z are 7,15 and 17 respectively. Which two of these elements will show similar chemical properties? Why?   4 Write any two methods…

CBSE Class 10 Science Question Paper Solved 2020 Set D

SECTION A   1 What is saliva? State its role in the digestion of food?    2 Name the ‘blob’ that develops at the tip of the sporagiophore in Rhizopus    3 a) What do you mean by redox reaction.   b) Identify the substance oxidized and substance reduced in the given chemical…

CBSE Class 10 Science Question Paper Solved 2020 Set C

SECTION A   1 Name the ‘blob’ that develops at the tip of the sporagiophore in Rhizopus.    2 Why the inner wall of stomach is not digested although the digestive enzyme can digest it?    3 State what happens when zinc granules are heated with sodium hydroxide. Write balanced…

CBSE Class 10 Science Question Paper Solved 2020 Set B

CHEMICAL REACTIONS AND EQUATIONS   One mark questions   1. What change in color is observed when white silver chloride is left exposed to sunlight? State the type of chemical reaction in this change.   2. Why do gold and platinum not corrode in moist air ?   3. A magnesium…

CBSE Class 10 Science Question Paper Solved 2020 Set A

SECTION A   1. Wing of a bird and wing of a bat are examples of analogous organ. Justify the answer giving a suitable reason.   2. All information for our environment is detected by specialized tips of some nerve cells. Mention the name given to such tips and mention where…

CBSE Class 10 Science Compartment Question Paper Solved 2020 Set B

SECTION A 1. How many pairs of chromosomes are present in human beings ?    2. Define pole of a spherical mirror.    3. Answer question numbers 3(a) - 3(d) on the basis of your understanding of the following paragraph and the related studied concepts :   Matter around us is…

CBSE Class 10 Science Compartment Question Paper Solved 2020 Set A

SECTION A 1. Name two infections which can be sexually transmitted in human beings.    2. Define pole of a spherical mirror.   3. Answer question numbers 3(a) - 3(d) on the basis of your understanding of the following paragraph and the related studied concepts :   Matter…

CBSE Class 10 Science Boards 2020 Question Paper Solved Set E

SECTION A 1. Covalent compounds are generally poor conductors of electricity. Why ?    2. State the common characteristic of the following elements :    Boron, Silicon, Germanium and Arsenic OR State the Periodic Law on which the Modern Periodic Table is based.   3. Answer…

CBSE Class 10 Science Boards 2020 Question Paper Solved Set D

SECTION A 1. Which oils should be chosen for cooking to remain healthy ?    2. Define the term induced electric current.    3. Answer question numbers 3(a) - 3(d) on the basis of your understanding of the following paragraph and the related studied concepts :   Around the year…

CBSE Class 10 Science Boards 2020 Question Paper Solved Set C

Section – A 1. How are covalent bonds formed ?   2. Define electropositivity.   The atomic radii of first group elements are given below :   Group-I element     Atomic Radii (pm)         Na                           86          K                           231         Rb…

CBSE Class 10 Science Boards 2020 Question Paper Solved Set B

Section – A 1. Covalent compounds have low melting and boiling point. Why ?   2. How many metals are present in second period of periodic table ?   3. Answer question numbers 3(a) to 3(d) on the basis of your understanding of the following paragraph and the related studied…

CBSE Class 10 Science Boards 2020 Question Paper Solved Set A

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CBSE Class 10 Science Question Paper 2020 Set A

CBSE Class 10 Science Question Paper 2020 Set A SUBJECT – SCIENCE Time: 3Hrs. M.M. :80 General Instructions: 1. All questions are compulsory. 2. Question no. 1 to 4 in section A are one mark questions. 3. Question no. 5 to 13 are two marks questions. 4. Question no. 14 to 22…