Sujeet Kumar

Chapter 1 Sets Practice Set 1.1 Question 1.Write the following sets in roster form.i. Set of even natural numbersii. Set of even prime numbers from 1 to 50iii. Set of negative integersiv. Seven basic sounds of a sargam (sur)Answer:i. A = { 2, 4, 6, 8,….}ii. 2 is the only even prime number∴ B = … Read more

Question 1.Complete the table. Answer: Question 2.Write notes.a. Disaster Management Authority.Answer:Disaster Management Authority is the body that works at the level of government from national level to village level. This work is basically about management of any disaster and tackling the problems of the affected people. At National level there is National Disaster Management Authority … Read more

Question 1.Fill in the blanks with appropriate word.a. Laughter club is a remedy to drive away …………..(a) stress(b) addictions(c) lethargy(d) epidemicsAnswer:(a) stress b. Alcohol consumption mainly affects …………. system.(a) digestive(b) respiratory(c) nervous(d) excretoryAnswer:(c) nervous c. IT Act 2000 is to control the ……….(a) housebreaking(b) cybercrimes(c) cheating(d) pickpocketingAnswer:(b) cybercrimes Question 2.Answer the following.a. Which factors affect … Read more

Question 1.Fill in the blanks and complete the statements.a. Methods like artificial insemination and embryo transplant are mainly used for ………..(a) animal husbandry(b) wild life(c) pet animals(d) for infertile womenAnswer:(a) animal husbandry b. ……….. is the revolutionary event in biotechnology after cloning.(a) Human genome project(b) DNA discovery(c) Stem cell research(d) All the aboveAnswer:(c) Stem cell … Read more

Question 1.Rewrite the following statements using correct of the options and explain the completed statements.(gluconic acid, coagulation, amino acid, 4% acetic acid, clostridium, lactobacilli) a. Process of ……. of milk proteins occurs due to lactic acid.Answer:Process of Coagulation of milk proteins occurs due to lactic acid.Explanation: The lactobacilli are the bacteria carrying out fermentation of … Read more

Question 1.a. I am diploblastic and acoelomate. Which phylum do I belong to ?Answer:I am from phylum Cnidaria or Coelenterata. b. My body is radially symmetrical. Water vascular system is present in my body. I am referred as fish though I am not. What is my name?Answer:Starfish. I am from Echinodermata phylum. c. I live … Read more

Question 1.Remake the table taking into account relation between entries in three columns. I II III Coal Potential energy Wind electricity plant Uranium Kinetic energy Hydroelectric plant Water reservoir Nuclear energy Thermal plant Wind Thermal energy Nuclear power plant Answer: I II III Coal Thermal energy Thermal plant Uranium Nuclear energy Nuclear power plant Water … Read more

Question 1.Reorganize the following food chain. Describe the ecosystem to which it belongs.Grasshopper – Snake – Paddy field – Eagle – Frog.Answer: Question 2.Explain the statement – ‘We have got this Earth planet on lease from our future generations and not as an ancestral property from our ancestors.’Answer: Question 3.Write short notes.a. Environmental conservation.Answer:Due to … Read more

Question 1.Complete the following chart. Asexual reproduction Sexual reproduction 1. Reproduction that occurs with the help of somatic cells is called asexual reproduction. 1. ______________________________________________________________________________________ 2. ______________________________________________________________________________________ 2. Male and female parent are necessary for sexual reproduction. 3. This reproduction occurs with the help of mitosis only. 3. ______________________________________________________________________________________ 4. ______________________________________________________________________________________ 4. New individual formed … Read more

Question 1.Fill in the blanks and explain the statements.a. After complete oxidation of a glucose molecules, ……….. number of ATP molecules are formed.Answer:After complete oxidation of a glucose molecules, 38 number of ATP molecules are formed. b. At the end of glycolysis, ……………… molecules are obtained.Answer:At the end of glycolysis, pyruvate molecules are obtained. c. … Read more