Sujeet Kumar

Textbook Questions and Answers 1. Complete the following by using the correct option: Question a.Air, water, minerals, soil are ………….. factors of an ecosystem. (physical, organic, inorganic)Answer:Air, water, minerals, soil are physical factors of an ecosystem. Question b.River, ponds, ocean are …………. ecosystems, (land, aquatic, synthetic)Answer:River, ponds, ocean are aquatic ecosystems. Question c.Man is ………….. in an ecosystem. (producer, … Read more

Textbook Questions and Answers 1. Try to find it: Question a.Plastic shows …………. property, hence it can be moulded to any shape.Answer:Plastic shows plasticity property, hence it can be moulded to any shape. Question b.Motor cars are coated with ……… .Answer:Motor cars are coated with Teflon. Question c.Thermocol melts at ………… °C.Answer:Thermocol melts at more than 100 °C (it is … Read more

Textbook Questions and Answers 1. Fill in the blanks: Question i.The perpendicular to the mirror at the point of incidence is called …………. .Answer:The perpendicular to the mirror at the point of incidence is called the normal. Question ii.The reflection of light from a wooden surface is ……….. reflection.Answer:The reflection of light from a wooden surface … Read more

Textbook Questions and Answers 1. Fill in the blank with appropriate word: Question a.The region in a sound wave, with higher pressure and density is called ………….. and that with low pressure and density is called ……….. .Answer:The region in a sound wave, with higher pressure and density is called compression and that with low pressure and … Read more

Textbook Questions and Answers 1. A. Whom should I pair with? Question a. Group ‘A’ Group ‘B’ 1. Temperature of a healthy human body a. 296 K 2. Boiling point of water b. 98.6 °F 3. Room temperature c. 0°C 4. Freezing point of water d. 212 °F Answer: Group ‘A’ Group ‘B’ 1. Temperature … Read more

Textbook Questions and Answers 1. Complete the statement by filling the gaps using appropriate term from the terms given in the brackets:(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign) Question a.An ……….. is drawn in between the reactants and products while writing the equation for … Read more

Textbook Questions and Answers 1. Identify the following solutions, whether they are acid or base. Question a. Answer: 2. Write chemical names from given formulae.H2SO4, Ca(OH)2, HCl, NaOH, KOH, NH4OH Question a.Write the chemical names from given formulae: H2SO4, Ca(OH)2, HCl, NaOH, KOH, NH4OHAnswer: 3. Sulphuric acid has highest importance in chemical Industry. Why? Question … Read more

Textbook Questions and Answers 1. Find out my partner. Question a. Group ‘A’ Group ‘B’ 1. Heartbeats a. 350 ml 2. RBC b. 7.4 3. WBC c. 37° C 4. Blood donation d. 72 per min 5. Normal body temperature e. 50 – 60 lakh/mm3 6. pH of oxygenated blood f. 5000 – 6000 per … Read more

Textbook Questions and Answers 1. Who am I? Question a.I am ATP producing factory.Answer:Mitochondria Question b.I am single-layered but maintain cellular osmotic pressure.Answer:Vacuole Question c.I support the cell, but I am not cell wall. I have a body resembling net.Answer:Endoplasmic reticulum Question d.I am chemical factory of the cell.Answer:Chloroplasts in case of plant cells can … Read more

Textbook Questions and Answers 1. Answer the following in your own words. Question a.Explain the relation between continuous rains and landslide. Give reasons.Answer:Before the actual landslide, many changes occur in the surrounding hilly ground. The hard rocks develop cracks and crevices. These are natural changes but due to man-made activities, the cracks are widened due … Read more