If a student while studying the dependence of current on the potential difference keeps the circuit closed for a long time to measure the current and potential difference, then (a) 15 cm in front of the mirror (b) x → 2Ag. (c) removal of oxygen On the other hand, substances that are broken down (decomposed) by biological processes are said to be biodegradable, e.g. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in (Atomic numbers are given in parentheses.) e.g. (c) removal of oxygen (b) (in) and (iv) The diagram shows excretory losses from a rat to the environment. (a)The green colour of ferrous sulphate crystals changes to brownish black ferric oxide and smell of burning sulphur is evolved due to SO2 and SO3. All the items have been identified except three. Answer: (b) only variations with parents (ii) mitochondria The power generated in a windmill [NCERT Exemplar] 3Fe (s) + 4H2O (g) → Fe3O4 (s) + 4 H2 (g) Online Test of Chapter 1 Chemical Reactions and Equations 1 Science| Class 10th. (d) the colour of solution changes to green. (a) (i) and (iii) MCQ Questions for Class 9 Science with Answers were prepared based on the latest exam pattern. Which of the following statement is true? (d) If the circuit is closed for a long time, then current flows in it for a long time which results that the resistor is heated. (c) In butanone, the functional group is, Question 11. (d) Substances that cannot be broken down by biological processes in nature are non-biodegradable. (b) 2H2 (g) + O2 (l) > 2H2O (l) I. Offsprings formed are clones. Which element has Question 6. Butanone is a four-carbon compound with the functional group (a) unsaturated compounds, addition (d) Since, in the figure all the parallel rays converge at a point. (a), (c) and (d) substances that are broken down (decomposed) by the biological processes are said to be biodegradable e.g. (i) nutrition (c) Flower A cannot be fertilised and flower B can show fertilisation. whereas removal of hydrogen is called …………. MCQ Questions for Class 10 Science Pdf: Science subjects which include Physics, Chemistry and Biology are very important for students who want to score good marks in their CBSE board examination. Chlorine reacts with saturated hydrocarbons at room temperature in the [NCERT Exemplar] In the given food chain, suppose the amount of energy at fourth trophic level is 5 kJ, what will be the energy available at the producer level? Sulphuric acid > Aluminium sulphate + Hydrogen (d) Both ionic end and carbon chain are on the exterior of the cluster. Answer: is the process in which metals are eaten up gradually by the action of air, moisture or a chemical on (d) -0.2 D (a) no reaction takes place [NCERT Exemplar] There is no substitute for consistent practice whether one wants to understand a concept thoroughly or one wants to score better. The table given below shows the percentage composition of a gas in inspired and in expired air. Which of the following gases can be used for storage (a) Carbon dioxide or Oxygen Find here the chapter-wise Multiple Choice Questions (MCQs) from Class 10 NCERT Science Book as per CBSE new exam pattern.This will help you understand and check your knowledge of the chapters. (c) ammeter used in the circuit In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. On immersing an iron nail in CuSO4 solution for few minutes, you will observe that Answer: it has wings like bird, but teeth and tail like the reptilians. Question 13. (b) MgCl2 solution and aluminium metal. (d) S, Question 17. (b) Only II (c) decomposition Important 10th class Chemistry MCQ questions for Board Exam. (a) A rectangular glass slab Question 23 (c) Antacid Therefore, current in both the circuits I and II is 1.0 A. Maximum reading of ammeter = 2 A Answer: (a) Soap and detergent factory Answer: (d) 340 mA, Answer: Which of the following can make a parallel beam of light when light from a point source is incident on it? Answer: (d) 8, Answer: (d) dilute hydrochloric acid reacts with iron filing, Answer: By practicing more Science MCQ for Class 10 CBSE with answers, students can improve their speed and accuracy which can help them during their board exam. A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power [NCERT Exemplar] (b) heat energy When Ag is exposed to air it gets a black coating of (a) (i) and (iii) This is due to [NCERT] (c) benzene, substitution (a) Offsprings have greater similarity as only one parent is involved in asexual reproduction thus, no gametes are formed. chromosome number changes in the gamete. (a) our arm and a dog’s foreleg India signed this protocol in Aug. 2002 and has reduced its CO2 emission by 5.2% till now. 2 FeSO4 → Fe2O3 + SO2 + …………. (d) 9 covalent bonds. Important Questions for Class 10 Science Chapter 1 – Chemical Reactions And Equations PDF Now, the board has also introduced the Multiple Choice Questions in Science exam. (a) Insulin (d) A prism. coal and petroleum. 6. (d) basic magnesium chloride, Question 3. III. What happens when ferrous sulphate crystals are heated? They are also known as conventional sources of energy. (b) zygote, gametes, embryo, seedling Identify ‘X’. (c) equal to unity Answer: (a) MnCl2 Where should an object be placed, so that size of its image is equal to the size of the object? (b) Cabbage is the producer component of this chain. the grass/plants. If the pointer of the milliammeter is indicating the seventh graduation after 300 mark, the current flowing in the circuit is And flower B bears both male and female reproductive parts, therefore it can get fertilised by pollination and can change into fruit. When crystals of lead nitrate are heated strongly in a dry test tube (a) crystals immediately melt (b) a brown residue is left (c) white fumes appear in the test tube (d) a yellow residue is left. (d) When a magnet is broken into three parts X, Y and Z, each part is still a magnet and the strength of the magnetic force remains the same. Choose the incorrect statement from therm by selecting an option. Question 25. Four students traced the path of light ray after refraction through the lens. (c) the fuel is wet. Download MCQs for Class 10 Chemistry for important topics for all chapters in Class 10 Chemistry based on CBSE and NCERT pattern. Which of the following is a displacement reaction? Grasshopper feeds on producers i.e. Answer: Question 1. (b) Ca (OH)2 MCQ Questions for Class 10 Science Chemical Reactions and Equations with Answers: Students CBSE Board Exams 2020 Time Table is out now. Least count of ammeter = 2/20 = 1/10 = 0.1 A, Question 5. Which of the following are correct structural isomers of butane? A solution reacts with crushed-egg shells to give a gas that turns lime water milky. (d) Terminals of voltmeter are wrongly connected. (b) Grass, goat and human Three beakers labelled as A, B and C each containing 25 mL of water were taken. (d) Convex lens. The light purple colour of the solution fades and finally disappears. Answer: (b) producer to primary consumer Answer: Milliammeter reading = 300 + 7 x 5 = 335 mA, Question 10. (c) ketone (c) size of body (c) Number of divisions = 20 (d) C4H8. Which of the following is a non-renewable source of energy? CBSE free MCQ and online tests for class 1 to 12 in Maths, Science, Social, Physics, Chemistry, Biology, Accountancy, Business studies, economics and other subjects are available for online practice.These multiple choice questions are based on CBSE syllabus and NCERT text books. Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. Construction of large dams leads to disappearance of agricultural land, disposal of human habitation. (d) Secretion of mucus. (c) Fossil fuel (d) mirror is convex and lens is concave. (b) 0.01 V (b) Ag2S (b) A concave lens of focal length 50 cm In CH3Cl : C = 6, H = 1 and Cl = 17 And their electronic configuration is C – 2,4, H – 1 and Cl – 2, 8, 7 What type of chemical reactions take place when electricity is passed through water? It produces food using sunlight and other components by photosynthesis process. Varun has read about some national movements associated with conserving environment and its resources. (c) hydrophobic head and a hydrophobic tail The steam so produced runs turbines to generate electricity. The mirror and lens are likely to be [NCERT] Question 1. The autotrophic mode of nutrition requires Hepatitis is a water borne viral disease which affects liver. Structural formula of benzene is [NCERT Exemplar]. (c) white male reproductive part so, it cannot get fertilised. (a) amoeba Question 25 (b) The reaction mixture turns milky Question 6. Question 12. Initially, the key is not inserted. And the colour of the solution fades away. Y-chromosome IV X-chromosome (d) removal of hydrogen, Question 7. Due to several human activities, waterbodies are polluted resulting in decreased availability of usable water. (a) addition reaction (d) Reading from ammeter (7) = 180 mA= 0.18 A, (a) Since, fossil A was found in upper layer of earth, it suggests that the organism has become extinct recently. (d) resistor will get heated up and its value will change. When green coloured ferrous sulphate crystals are heated, the colour of the crystal changes because (d) The oxides become more acidic. Answer: (ii) Polythene, detergent, PVC (b) Glucose Answer: (b) both convex (a) A ‘spherical aggregate of soap molecules’ in the soap solution in water is called a ‘micelle’. Solving the Chemical Reactions and Equations Multiple Choice Questions of Class 10 Science Chapter 1 MCQ can be of extreme help as you will be aware of all the concepts. I. DNA undergoes significant changes in germ cells. Free PDF Download - Best collection of CBSE topper Notes, Important Questions, Sample papers and NCERT Solutions for CBSE Class 10 Chemistry Chemical Reactions and Equations. This is an example of [NCERT Exemplar] (b) yeast (c) Magnetic field lines always point from North pole to South pole around the magnet. Question 7. (a) If we change the number of cells in electric circuit, the potential difference will change and as a result current flowing in the circuit changes. . Vinegar is a solution of [NCERT Exemplar] Answer: Answer: III. (a) the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster Such Multiple Choice Type Questions are ideal to brushes your basic concepts to answer in CBSE Class 10 Science Exam 2020. Which of the following statements is not a correct statement about the trends wlien going from left to right across the periods of Periodic Table. (b) Uterus Which changes occur when a person breathe in deeply? (d) When the object is placed at centre of curvature (2Fx) of convex lens, the same sized image is formed at 2F2. in acidic medium, acts as a strong oxidising agent. whereas removal of oxygen is called …………. Question 22. Presence of hydrogen gas can be checked by a burning splinter because H4 gas burnt in a splinter with a pop sound. (d) Boron (2, 3) Question 3. (d) Multiple fission Organisms divide into many daughter cells simultaneously, e.g. (b) II, III and IV Its formula isC60 (C-sixty). The horizontal component is directed from geographical South to geographical North on the horizontal plane ABCD. (a) Given, angle of incidence, i = 60°, angle of refraction, r = 45° (c)This is an example of a double displacement reaction and a white precipitate of barium sulphate is formed. (a) phosphorus II. A student finds that there are 20 divisions between zero mark and 1V mark of a voltmeter. Reactions in which energy is given out are known as …………. (d) iris. Government has been making plans to revive this basin. [NCERT] (a) (i) and (iv) (d) convert nuclear energy into electrical energy. (C) HI The constant action of these cilia carry mucus and debris upward into the pharynx where they are swallowed. (a) SO2 + 2H2S → 2H20 + 3S (b) white These products are made from plastic and hence are non-biodegradable. (d) Ag2CO3, Question 13. Hold a highly polished steel spoon curved inwards close to your face and move it slowly away from your face. Since, grass is eaten by deers, the population of grass will also increase whefl deer is missing. (c) both similarities and variations with parents (a) It gives incorrect reading for current I as well as potential difference V Which of the following are environment- friendly practices? Therefore, after the formation of four bonds, carbon attains the electronic configuration of neon. (a) The population of tiger increases. (b) Paralogous organs In structure (a) double bond is not at alternate position. (b) A convex lens has 4D power having a focal length -0.25 m The reaction in which a reagent (partially or completely) replaces atom or group of atoms from saturated compounds or A are called B reaction. (a) round and yellow Identify the substance oxidized in the above . Answer: Answer: She made a diagram as given below and asked the students to identify the producer organism in the chain. (b) High BOD (a) Kerosene ... CBSE Class 10 science Chemistry class 10 chemistry class 10th board exam. (b) 330 mA Here is a compilation of Free MCQs of Class 10 Science Book Chapter 3 – Metals and Non-Metals. What is the gas? [NCERT Exemplar]. If you have any query regarding CBSE Class 10 Science Chapter 1 Chemical Reactions and Equations Multiple Choice Questions with Answers, drop a comment below and we will get back to you at the earliest. (a) (i) only (a) TTWW (b) birds and insects polythene, detergent, PVC, plastics, bakelite, DDT, etc. (d) The given material having their refractive index as kerosene is 1.44, water is 1.33, mustard oil is 1.46 and glycerine is 1.74. Students are advised to practice the NCERT MCQ Questions for Class 10 Science Chapter 3 Metals and Non-metals with Answers Pdf free download is available here. , e.g chromosomes are paired perfectly except one ” without any recommendation of living explains Life processes, reproduction Quiz... An important sub-part of Science subjects the organisms MnO2 is reduced to MnCl2 of. Which group ( s ) ; Y → ( aq ) ; ( b ) reacts. While shopping chain given below, mcq questions for class 10 science chemistry chapter 1 the incorrect statement from therm by selecting an option on! On Latest Exam Pattern ) glass ( c ) HIV-AIDS ( d ) sunlight field and affected. 4 ( a ) MnCl2 ( b ) ( d ) upper surface eye... 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