- How many structural isomers can you draw for pentane?
- What are the two unique properties of carbon?
- Draw the structure of butanone?
- Why is the conversion of ethanol to ethanoic acid an oxidation reaction?
- What are oxidizing agent?
- What are the limitations of Dobereiner’s classification?
- Name three elements with filled outermost shells?
- In the modern periodic table, which are the metals among the first ten elements?
- Which element has a total of three shells, with three electrons in its valence shell?
- How would the tendency to gain electron change on moving from left to right in a period of the periodic table?
- How does the chemical reactivity of alkali metals vary on going down in group 1 of the periodic table?
- Draw the electron dot structure of nitrogen molecule?
- Name the gas which is major component of biogas?
- Hoe is glacier acetic acid different from acetic acid provided to you in laboratory?
- Give any two test of carboxylic acid?
- Write the chemical equation for oxidation of ethanoic acid?
- Why do soaps form scum with hard water?
- Name the process used for preparation of soap? Wrote the chemical equation involved in this process?
- An element ‘X’ forms a chloride with formula XCl3? The element ‘X’ would be likely be in the same group of the periodic table is Na, Mg, Al or Ca?
- Write the limitation of newland’s octave classification?
- What was the Mendeleev’s basis for classification of elements?
- Why is variation beneficial to the species but not necessarily for the individual?
- How will an organism be benefited if it reproduce by spores?
- Why is vegetative propagation practiced for growing some types of plants?
- How does the embryo get nourishment inside the mother’s body?
- Name an STD which damages the immune system of human body and caused by bateria?
- Define genetics? Who is the fader of genetics?
- give the scientific term for the increase in the amount of non-biodegradable substances in the successive trophic levels of a food chain?
- Which chemical is used in fire extinguisher? How it is harmful?
- What is mean by sustainable development?
- Write two advantage of water shed management?
- ‘sun is the ultimate source of energy fpr fossil fuels’ justify this statement?
- Suggest two methods by which consumption of coal and petroleum can be reduced?
- What is meant by DNA copying/ mention its importance?
- What is the main purpose of rain water harvesting?
- Write two traditional water harvesting system in India?
- What are the function performed by testis in human beings?
- If a trait A exist in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait likely to have arisen earlier?
- What are a different ways in which individuals with a particular trait may increase in a population?
- Give an example of characteristaic being used to determine how close two species are in evolutionary terms?
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Class 10 Maths
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