CBSE Class 10 Science Sample Paper Solved 2021 Set E

SECTION A   1. Why reproduction is considered to be an essential phenomenon in organisms?    2. What is Ganga action plan?    SECTION B   3. i) What is meant by water harvesting?   ii) Write two advantages of storing water in the ground.   4. Compare and contrast bio-mass and…

CBSE Class 10 Science Sample Paper Solved 2021 Set D

SECTION A   1. Name the sex hormone secreted by male and female sex organs in human beings.    2. Write any two harmful effects of ozone depletion.    SECTION B   3. “Rain water harvesting is essential”. Justify this statement giving two reasons.    4. Give two advantages and…

CBSE Class 10 Science Sample Paper Solved 2021 Set C

SECTION A   1. Name the sex hormone secreted by male and female sex organs in human beings.    2. What is Ganga action plan?    SECTION B   3. List any two measures that you suggest for better management of water.    4. Explain how electrical energy is generated in a nuclear…

CBSE Class 10 Science Sample Paper Solved 2021 Set B

SECTION A   1. The danger signals installed at the top of tall buildings are red in colour. Why?    2. Why do all elements of the same group have similar properties?    3. In the Chlor-alkali process, a gas X is formed as byproduct. The gas X reacts with lime water to give a…

CBSE Class 10 Science Sample Paper Solved 2021 Set A

SECTION A   1 What is ‘blob’ known as in Blob on a stick structures of Rhizopus?    2 Mention any one point of difference between Pepsin and Trypsin.    3 An element ‘P’ has atomic number 13. What would be its position in the modern periodic table? Write the formula of its…

CBSE Class 10 Science Sample Paper 2020 Set D

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CBSE Class 10 Science Sample Paper 2020 Set C

METALS AND NON-METALS   I. 1 mark Questions. 1.. Name two elements that are stored in kerosene.   2. What will happen when a strip of copper is kept immersed in a solution of silver nitrate?   3. State any two ways to prevent the rusting of iron.   4. What type of oxides are…

CBSE Class 10 Science Sample Paper 2020 Set B

CARBON AND ITS COMPOUNDS   1. What is the name given to the chemical bond   a) formed by sharing of electrons between two atoms?   b)formed by the transfer of electrons from one atom to another?   2. Draw the electron structure of simplest ketone.    3. Which of the following…

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…