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This is based on Sample paper issued by CBSE 2015 for SA- II Session 2015 Very short answers -VSA (1 mark) [Total 8 questions] 1. Name the book published by Natesa Sastri? 2. Which act had resulted in the formation of the „United kingdom of great Britain‟ ? 3. In which class of mail do cards and envelopes fall into ? 4. What does Kittiko –Hachchiko mean ? 5. What is the most distinctive feature of democracy ? 6. About how much percentage of loan of the poor households in urban area comes from the formal sector ? 7. Manufacturer should not use aggressive selling techniques to sell a particular product without giving the consumer a chance to select from alternative products available. Which right is referred here ? 8. When was India’s Foreign trade liberalised ? Short answers -VSA (3 mark) [To

Download New CBSE Class IX Mathematics and Science Solved Question Paper for exam 2015 Mathematics and Science Solved Question Paper for exam 2015 9th Maths SA2 Solved Sample paper [JST201501] 9th Maths SA2 Solved Sample paper [JST201502] 9th Maths SA2 Solved Sample paper [JST201503] 9th Maths SA2 Solved Sample paper [JST201504] 9th Maths SA2 Solved Sample paper [JST201505] 9th Maths SA2 Solved Sample paper [JST201506]     Download File Science Solved Question Paper for exam 2015 9th science SA 2 Sample Paper Solved [JST201501] 9th science SA 2 Sample Paper Solved [JST201502] 9th science SA 2 Sample Paper Solved [JST201503] 9th science SA 2 Sample Paper Solved [JST201504] Download File Science Solved Question Paper for exam 2014 9th science SA 2 Sample Paper Solved [JST201401] 9th science SA 2 Sample Paper Solved [JST201402] 9th science SA 2 Sample Paper Solved [JST201403] 9th science SA 2 Sample Paper Solved [JST201404] 9th science SA 2 Sample Paper

1. Q. The description of atomic particles of two elements X and Y is given below Protons neutrons electrons X 8 8 8 Y 8 9 8 (i) What is the atomic number of Y? (ii) What is the mass number of X? (iii) What is the relation between X and Y? (iv) Which element/elements do they represent? (v) Write the electronic configuration of X? (vi) Write the cation/anion formed by the element Ans: (i) Atomic number of y =  8             (ii) Mass number of x – 16           (iii) x and y are isotopes   (iv) x and y represent – oxygen               (v) 2, 6                                       (vi) It will form an anion – O -2 2. Q. Which of the following are isotopes and which are isobars? Argon,  Protium, Calcium, Deuterium. Explain why the isotopes have similar chemical properties but they differ in physical properties? Ans: Isotopes – Protiu

CBSE NCERT Questions with solutions Q. State the role of the atmosphere in climate control? Ans: Atmosphere prevents sudden increase in temperature during the day light hours. It slows down the escape of heat into outer space during the night. Q. How is acid rain caused ? Ans: The fossil fuels like coal and petroleum/contain small amounts of nitrogen and sulphur/When the fossil fuels are burnt,/nitrogen and sulphur are burnt/and produces different oxides of nitrogen and sulphur/When these oxides dissolve in rain it gives rise to acid rain. Q. What are the different ways in which water gets polluted ? How does it affect the life forms ? Ans: (a) The addition of undesirable substances like fertilizers and pesticides, mercury salts in water/can cause cholera produced by the bacteria. (b) The removable of desired substances like oxygen from the water/adversely affect the aquatic organisms. (c) A sudden change in temperature in water bodies/would be dangerous and effect the

CBSE Class 10 Mathematics Solved Sample Papers 10th Mathematics - SA2-Solved Sample Paper-K151 10th Mathematics - SA2-Solved Sample Paper-K152 10th Mathematics - SA2-Solved Sample Paper-K153 10th Mathematics - SA2-Solved Sample Paper-K154 10th Mathematics - SA2-Solved Sample Paper-K155 Download File CBSE Mathematics Sample Papers March 2015 10th Maths SA2 Sample paper 2015[JST101501] 10th Maths SA2 Sample paper 2015[JST101502] 10th Maths SA2 Sample paper 2015[JST101503] 10th Maths SA2 Sample paper 2015[JST101504] 10th Maths SA2 Sample paper 2015[JST101505]            Download File

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Question: Why plants do not utilize nitrogen directly from atmosphere? Ans. Most of the plants cannot utilise nitrogen directly from the atmosphere. They use nitrogen only when it is converted into nitrates and nitrites by the process nitrogen fixation. Question: Name the substance that reduces the amount of dissolved oxygen in water. Ans. Excessive growth of phytoplanktons reduces dissolved oxygen level in water Question: Name the organisms found to be very sensitive to the levels of contaminants like sulphur dioxide in the air. Ans. Lichens Question: What do you understand by the term ‘Natural resources’? Ans. Natural resources are the variety of substances that human beings get from the nature to meet their basic needs. Question: What is strip-cropping? Ans. Strip-cropping is the planting of crops in rows or strips to check flow of water. It is practiced in the sloping areas of hills to check soil erosion Question: What is greenhouse effect? How is it caused? Ans. Greenho