0% 1 votes, 5 avg 1 JMI Class-11 Science PYQs- 2021 1 / 100 Which of the following salt does not contain any water of crystallization? A) Blue vitriol B) Washing soda C) Baking soda D) Gypsum 2 / 100 HCI is an Arrhenius acid because it gives: A) H⁺ ions in aqueous solution B) Cl⁻ ions aqueous solution C) Both H⁺ and Cl⁻ ions in aqueous solution D) None of these 3 / 100 Which of the following remain unchanged on going down the group in the periodic table? A) Valence electron B) Atomic size C) Density D) Metallic character 4 / 100 The major constituent of biogas is: A) Propane B) Acetylene C) Methane D) Benzene 5 / 100 When copper powder is heated, it gets coated with: A) Black copper oxide B) Yellow copper oxide C) Red copper oxide D) None of these 6 / 100 We store silver chloride in a dark colored bottle because it is: A) A white solid B) Undergoes redox reaction C) To avoid action by sunlight D) None of these 7 / 100 Stainless steel is very useful material for our life. In stainless steel, iron is mixed with… A) Ni and Cr B) Cu and Cr C) Ni and Cu D) Cu and Au 8 / 100 Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam? A) FeO B) Fe₂O₃ C) Fe₃O₄ D) Fe₂O₃ and Fe₃O₄ 9 / 100 Which of the following is not a mineral acid? A) Hydrochloric acid B) Citric acid C) Sulphuric acid D) Nitric acid 10 / 100 What is used in fire extinguishers? A) NaHCO₃ B) HCl C) NaCl D) CaCl₂ 11 / 100 What type of oxide would eka-Aluminium form? A) EO₃ B) E₃O₂ C) E₂O₃ D) EO 12 / 100 The byproduct of soap is ………….. . A) Isoprene B) Glycerol C) Butene D) Ethylene glycol 13 / 100 Out of Mg and Al, which has higher first ionization energy? A) Mg B) Al C) Both have same D) Cannot be determined 14 / 100 Which is denatured spirit? A) Ethanol only B) Ethanol and methanol (50%) C) Ethanol and methanol (5%) D) Methanol only 15 / 100 Which of the following compounds is not a type of carbon compound? A) Lipids B) Vitamins C) Nucleic acids D) Carbohydrates 16 / 100 Who of the following was for the first time designated as the Governor of India? A) Lord Clive B) Lord Cornwallis C) Lord Warren Hastings D) Lord Wellesley 17 / 100 Shahjahan built Tajmahal in the memory of: A) Arjumand Banu B) Noor Jahan C) Jahan Ara D) Roshan Ara 18 / 100 Name the book written by Al-Biruni is: A) Rihla B) Kitab-ul-hind C) Travels in Mughal Empire D) None of the above 19 / 100 Which of the following is the correct significance of yellow revolution in India? A) Milk production B) Poultry production C) Agriculture D) Oilseeds Production 20 / 100 Which of the following country is known as the place of midnight sun? A) Canada B) Norway C) Sweden D) Greenland 21 / 100 Where is the Nathula pass located? A) Sikkim B) Arunachal Pradesh C) Jammu and Kashmir D) None 22 / 100 Who is the recipient of 2020 Rajiv Gandhi Khel Ratna Award? A) Bajrang Punia B) Deepa Malik C) Rohit Sharma D) Virat Kohli 23 / 100 Which state loses its special status under Article 370 in 2019? A) Jammu and Kashmir B) Delhi C) Arunachal Pradesh D) Assam 24 / 100 Addis Ababa is the capital of A) Albania B) Angola C) Ecuador D) Ethiopia 25 / 100 Which Covid-19 vaccine imported to India from Russia? A) Covaxin B) Covishield C) Moderna D) Sputnik V 26 / 100 The number of pair (s) of sex chromosomes in the zygote of human is: A) One B) Two C) Three D) Four 27 / 100 Respiratory quotient is: A) O₂ / CO₂ B) CO₂ / O₂ C) N₂ / CO₂ D) CO₂ / N₂ 28 / 100 Which of the following is not the function of the large intestine? A) Forming feaces B) Absorb 90% of nutrients C) Defecating D) Absorbing some water, ions, and vitamins 29 / 100 By which name is family planning currently known as? A) Reproductive and child care B) Family and child care C) Reproductive and child health D) Reproductive and child health care 30 / 100 Which vitamin helps in vision? A) Vitamin A B) Vitamin B C) Vitamin E4 D) Vitamin K 31 / 100 Thrombocytes is another name for A) Red corpuscles B) Platelets C) Plasma D) White blood corpuscles 32 / 100 Oxygenated blood reaches heart by A) Pulmonary artery B) Pulmonary vein C) Aorta D) Vena cava 33 / 100 Which of the following hormone plays a major role in water reabsorption? A) Somatostatin B) Relaxasin C) Oxytocin D) Vasopressin 34 / 100 What is the pH of the saliva? A) 3-5 B) 7-8 C) 5.5-6.2 D) 6.2-7.4 35 / 100 During deficiency of oxygen in tissues of humans, pyruvic acid is converted into lactic acid in A) Cytoplast B) Chloroplast C) Mitochondria D) Golgi body 36 / 100 The sex of human child depends on the sex chromosome present in A) Egg B) Sperm C) Both (A) and (B) D) None of these 37 / 100 A section of DNA providing information for one protein is called A) Nucleus B) Chromosomes C) Trait D) Gene 38 / 100 Apomixis means A) Vegetative propagation B) Asexual reproduction C) Sexual reproduction D) Binary fusion 39 / 100 In birds, nitrogenous waste is: A) Ammonia B) Urea C) Amino acids D) Uric acid 40 / 100 Which one of the following does not have a nucleus? A) WBC B) RBC C) Epidermal cells D) Guard cells 41 / 100 The temperature of a conductor is increased. The graph best showing the variation of its resistance is A) (a) B) (b) C) (c) D) (d) 42 / 100 Calculate the current flows through the 10Ω resistor in the following circuit. A) 1.2 A B) 0.6 A C) 0.2 A D) 2.0 A 43 / 100 To convert an AC generator into DC generator, ……….. . A) Split-ring type commutator must be used B) Slip rings and brushes must be used C) A stronger magnetic field has to be used D) A rectangular wire loop has to be used 44 / 100 Trophic level in an ecosystem represents A) Oxygen Level B) Water Level C) Energy Level D) Salt Level 45 / 100 Acid rain is caused by the oxides of ………… . A) Carbon B) Nitrogen only C) Sulphur only D) Sulphur and Nitrogen 46 / 100 The image fornied by a convex lens can be ………… . A) virtual and magnified B) virtual and diminished C) virtual and of same size D) virtual image is not formed 47 / 100 An object at a distance of +15 cm is slowly moved towards the pole of a convex mirror. The image will get ………… . A) shortened and real B) enlarged and real C) enlarge and virtual D) diminished and virtual 48 / 100 The higher the frequency, ………. the wavelength of a light. A) Shorter B) Longer C) Unaffected D) Variable 49 / 100 Two thin lenses of power +10D and −2D are placed in contact. The focal length of the combination is ………… . A) +800 cm B) +12.5 cm C) +16.6 cm D) +8.3 cm 50 / 100 Virtual image larger than the object can be produce by ………… . A) Concave mirror B) Convex mirror C) Plane mirror D) All of the above 51 / 100 The working of a generator is based upon ………… . A) Heating effect of current B) Electromagnetic induction C) Chemical effect of current D) Magnetic effect of current 52 / 100 Bending of partly immersed pencil in water is due to ………… . A) Reflection B) Refraction C) Scattering D) Eye defect 53 / 100 Resistivity of a given conductor depend on ………… . A) Length of conductor B) Length as well as cross section C) Material and dimensions of conductor D) Material of conductor and temperature 54 / 100 The direction of magnetic field development around a current carrying conductor can be easily found by the use of ………… . A) Right hand thumb rule B) Left hand thumb rule C) Fleming’s left hand rule D) Fleming’s right hand rule 55 / 100 Factor which does not affect electromagnetic induction is ………… . A) Magnetic field B) Area of the loop C) Orientation of coil D) Material of coil 56 / 100 If the probability of an event is P, the probability of its complementary event will be: A) P − 1 B) P C) 1 − p D) 1 57 / 100 The median of set of 9 distinct observations is 20.5. If each of the largest 4 observations of the set is increased by 2, then the median of the new set ………… . A) is increased by 2 B) is decreased by 2 C) is two times of the original number D) Remains the same as that of the original set 58 / 100 To draw a pair of tangents to a circle which are inclined to each other at an angle of 35°. It is required to draw tangents at the end points of those two radii of the circle, the angle between which is A) 105° B) 70° C) 140° D) 145° 59 / 100 lf x sin (90° θ) cot (90° − θ) = cos (90° − θ), then x is equal to ………… . A) 0 B) 1 C) −1 D) 2 60 / 100 △АВС and △BDE are two equilateral triangles such that D is the mid point of BC. Ratio of the areas of triangle △АВС and △BDE is ………… . A) 2 : 1 B) 1 : 2 C) 4 : 1 D) 1 : 4 61 / 100 If the zeroes of the quadratic polynomial x² + (a + 1)x + b are 2 and −3, then A) a = −7, b = −1 B) a = 5, b = −1 C) a = 2, b = −6 D) a = 0, b = −6 62 / 100 The decimal form of \(\frac{129}{2²5⁷7⁵}\) is ………… . A) terminating B) non-terminating C) non-terminating repeating D) none of the above 63 / 100 The value of cos θ⁰ cos 1⁰ cos2⁰ ………… cos 89⁰ cos 90⁰ is ………… . A) 1 B) −1 C) 1/√2 D) 0 64 / 100 A circle drawn with origin as the centre passes through (13/2, 0). The point which does not lie in the interior of the circle is ………… . (a) \(\left( \frac{−3}{4},1 \right)\) (b) \(\left(2, \frac{7}{3} \right)\) (c) \(\left(5, \frac{−1}{2} \right)\) (d) \(\left(−6, \frac{5}{2} \right)\) A) (a) B) (b) C) (c) D) (d) 65 / 100 (x² +1)² − x² −0 has ………… . A) Four real roots B) Two real roots C) No real roots D) One real roots 66 / 100 The father’s age is six times his son’s age. Four years hence, the age of the father will be four times his son’s age. The present ages of the son and the father, in years, are respectively ………… . A) 4 and 24 B) 5 and 30 C) 6 and 36 D) 3 and 24 67 / 100 If the LCM and HCF of two numbers are 182 and 13 respectively. If one of the numbers is 26, then the other number is ………… . A) 52 B) 78 C) 91 D) 104 68 / 100 (−1)ⁿ +(−1)ᴿⁿ =0, then n is ………… . A) Any positive integer B) Any odd natural number C) Any natural number D) Any negative integer 69 / 100 A card is drawn at random from a pack of 52 cards. The probability that the drawn card is not an is ………… . (a) \(\frac{1}{13}\) (b) \(\frac{9}{13}\) (c) \(\frac{4}{13}\) (d) \(\frac{12}{13}\) A) (a) B) (b) C) (c) D) (d) 70 / 100 A piece of wire 20 cm long is bent into the form of an arc of a circle subtending an angle of 60° at its centre then the radius of the circle is ………… . (a) \(\frac{40}{π}\) (b) \(\frac{60}{π}\) (c) \(\frac{30}{π}\) (d) \(\frac{20}{π}\) A) (a) B) (b) C) (c) D) (d) 71 / 100 11ᵗʰ term of the AP −3, \(\frac{−1}{2}\), 2, ……. is ………… . A) 28 B) 22 C) −38 D) −97/2 72 / 100 If 1 is a root of quadratic equation ax² − 5 (a − 1)x – 1 = 0, then the value of a is ………… . A) −1 B) 1 C) ½ D) −1/2 73 / 100 If 2x – 3 y = 5 and 3x − 2 y =10, then the value of x − y is ………… . A) 3 B) 5 C) −3 D) 2 74 / 100 If one zero of the quadratic polynomial 3x² − 10x − m is \(\frac{5}{3}\), then the other zero is ………… . (a) \(\frac{2}{3}\) (b) \(\frac{5}{3}\) (c) \(\frac{−5}{3}\) (d) \(\frac{−15}{2}\) A) (a) B) (b) C) (c) D) (d) 75 / 100 is ………… . A) An integer B) A rational number C) An irrational number D) None 76 / 100 Read the passage below and tick the correct options : (for questions no 76 to 80) Language is a wonderful gift given to Man. No animal possesses this gift but they have their own ways of expressing themselves. When a rabbit sees an enemy it runs away into its hole. Its tail, which is white, bobs up and down as it runs. The other rabbits see it and they run too. They know that there is a danger. When a Cobra is angry, its raises its hood and makes itself looks fierce. This warns other animals. When a bee has found some food it goes back to the hive. It can’t tell the other bees where the food is by speaking to them, but it does a kind of dance in the air. Some animals say things by making sounds. A dog barks when a stranger comes near. A Cobra raises its hood when it is: A) Happy B) Angry C) Fearful D) Sad 77 / 100 When a rabbit sees an enemy: A) It makes sound B) It rubs its skin C) It laughs loudly D) It runs away into its hole 78 / 100 A rabbit’s white tail bobs up and down : A) As it dances B) As its runs C) As it hides underground D) As it laughs 79 / 100 Language is a wonderful gift from God : A) Given to man B) Given to animal C) Given to bird D) Given to lions 80 / 100 The word possesses means : A) It is B) Ones C) Owns D) Ready 81 / 100 Identify the tense used in the given sentence. “You are always working on our laptop.” A) Present indefinite tense B) Present perfect tense C) Present continuous tense D) Present perfect continuous tense 82 / 100 Fill in the blanks with future perfect tense form of the verb given in the bracket. “Marry …….. seats for us.” (saves) A) Ought to save B) Should have save C) Would have saved D) Would save 83 / 100 Identify the tense used in the underline phrase. “She has decided to distribute the duties after everyone completes their work.” A) Past perfect tense B) Present perfect tense C) Present indefinite tense D) Past indefinite tense 84 / 100 The whole family ………… for the ceremony. A) has been invited B) have been invited C) invites D) invited 85 / 100 Fill in the blank with the past perfect tense form of the verb given in the bracket. “Vikram ……… his job.” (do) A) Did B) Was doing C) Had done D) Had been doing 86 / 100 In the following questions, a sentence has been given in Direct Speech. Out of the four alternatives suggested, select the one which best expresses the same sentence in Indirect Speech. (Question 86 to 90) I reiterated. “I don’t care about the job.” A) I reiterated that I did not care about the job. B) I repeatedly said that I cared about the job. C) I said again and again I didn’t care about the job. D) I reiterated I don’t care about the job. 87 / 100 The young man promised her that he would be there the next day. A) The young man said, “I will be there the next day” B) The young man said, “I promise to be here tomorrow.” C) The young man said, “I will try to be there the next day.” D) The young man said, “I would be here the next day.” 88 / 100 He explained that he knew the place well because he used to live there. A) “I know the place well because I used to live here,” he explained. B) “I knew the place because I used to live here,” he explained. C) “I have known the place well because I used to live here,” he explained. D) “I know the place well because I used to live here,” he explained. 89 / 100 The old lady declared that she was going to walk where she pleased. They had the liberty. A) The old lady said, “I was going to walk where I pleased. They have the liberty”. B) The old lady said, “I am going to walk where I pleased. They had the liberty”. C) The old lady said, “I am going to walk where I please. We have the liberty.” D) The old lady said that “I was going to walk where I pleased. They have the liberty”. 90 / 100 I wondered how many discoveries went unheeded. A) I said “Do discoveries go unheeded?” B) I said “How many discoveries go unheeded? C) I said “How many discoveries went unheeded?” D) I said “How many discoveries have gone unheeded?” 91 / 100 Which punctuation mark should you use for an exclamatory? A) . B) ! C) ? D) “ 92 / 100 Transform the given sentence in assertive : How gorgeous the sunset is! A) How is the sunset so gorgeous? B) The sunset is gorgeous, isn’t? C) The sunset is very gorgeous. D) How gorgeous the sunset is 93 / 100 Transform the sentences into negative: Human is mortal. A) Human is immortal. B) Human is not immortal. C) Not all humans are mortal. D) Not all humans are immortal. 94 / 100 Jack and John ..………. helpful. A) Be B) Have been C) Was D) Had been 95 / 100 Choose the correct sentence: A) I did not accompanied them. B) I do not accompanied them. C) I do not accompany them. D) I do not accompany them. 96 / 100 What type of sentence is the following? It is cold outside today. A) Declarative B) Interrogative C) Exclamatory D) Imperative 97 / 100 What type of sentence is the following? Clean your room. A) Declarative B) Interrogative C) Exclamatory D) Imperative 98 / 100 Tick the correct option : – An exclamatory sentence ………… . A) makes a statement B) Ask a question C) Shows excitement D) Gives a command 99 / 100 Would you use a or for words beginning with consonant sound? A) . B) ! C) ? D) “ 100 / 100 Transform the given sentence into optative : You are very intelligent. A) How are you so intelligent? B) You are very intelligent. Aren’t? C) You are extremely intelligent. D) How intelligent you are! 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