CBSE ADDA

 Metals and Non Metals Question answer of Science Mission Book Class 8 science mission class 8 solutions chapter 4 A. Multiple choice questions 1. Which one of the following is a non-metal? (a) Sodium (b) Potassium (c) Sulphur (d) Platinum                                                           Ans . Sulphur 2. Property of metal to be drawn into wire is known as (a) Malleability (b) Ductility (c) Lustrous (d) Tensile strength                                              Ans. Ductility 3. Property of metal to be beaten into thin sheet is known as (a) Malleability (b) Ductility (c) Lustre (d) Tensile strength                                                Ans. Malleability 4. Metal used in galvanising iron is  (a) Zinc (b) Nickel (c) Tin (d) Aluminium                                                                          Ans. Zinc 5. Which one of the following is a metal? (a) Graphite (b) Iodine (c) Phosphorus (d) Magnesium                                         

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CBSE Class 7 Solved Objective Questions Chapter - Acids, Bases and Salts MCQs 1. The word acid comes from the Latin word ------ which means sour.( acere) 2. The substances used to test whether a substance is acidic or basic are known as ----(indicators) 3. The most commonly used natural indicator is litmus paper . It is extracted from ----(lichens) 4. In acidic solution, litmus paper turns into ------(red) 5. In basic solution, litmus paper turns into ------(blue) 6. In distilled water , litmus paper turns into ------(purple) 7. China rose indicator turns acidic solutions ------and basic solutions to ------ [dark pink (magenta) , green] 8. The reaction between an acid and a base is known as ----- [neutralization] 9. Salt and water are produced in neutralization process with the evolution of heat.[ water] 10. HCl + NaOH ----> ------- +   H 2 O   [NaCl] 11. Our stomach contains -------. It helps us to digest food[hydrochloric acid] 12. indigesti

Force and Pressure Class 8 Living Science Solution Read and Download 8th Reflection of sound_living science answer Download File 8th chemical effect of current living science solution Download File 8th Refraction and dispersion living science solution Download File Class8 Natural phenomena (living Science) answer Download File 8th Our universe living science solution Download File 8th Synthetic Fiber_plastic (Living science answer) Download File 8th Metals and Non metals solution(living science) Download File 8th combustion and flame living science solution Download File 8th Coal and Petroleum solution(living science) Download File 8th Pollution of water and air living science solution Download File For more chapter solution visit :  class-8-biology(living science)

A. MULTIPLE-CHOICE QUESTIONS: Choose the most appropriate answer. 1. Which of these is multicellular? a. Paramecium b. Amoeba c. bacteria d. mushroom 2. The egg of a hen is a a. cell. b. tissue c. organ d. organ system 3. Which of these is not present in an animal cell? a. mitochondria b. nucleus c. cell membrane d chloroplasts 4. Which of these is the control centre of the cell? a. nucleus b. cytoplasm c. mitochondria d. protoplasm 5. Which organelles are responsible for energy production in a cell? a. vacuoles b. chloroplasts c. mitochondria d. Golgi bodies 6. Which of these is not stated by the cell theory? a. Cells are the ba

Class 8 light and vision (reflection and eye) leanwell science/Basic science Q. Why are multiple images are formed when two mirror are placed at an angle to each other ? Ans: This happen because image formed by first mirror act as an object for 2nd mirror. No of image = (360/ q ) -1[0 degree or Parallel to each other --> Infinite number] Q. What do you mean by persistence of vision? Ans : Image of an object retain on retina for 1/16 th of a sec even after removed is called persistence of vision. This form the basis of the principle of cinematography. Q. How persistence of vision form basis of the principle of cinematography? Ans: in moving cinema, we take still pictures. The sequence of still pictures are projected on screen at rate of 24 images per second (persistence of vision is 1/16th of sec.)The successive images merge smoothly and give us feeling of movie. Q. A person whose retina is damaged cannot see why? Ans: This happens because retina acts as seen o

We are providing you scanned copy of exercise so that you can check your study chapters are: 1. Food production     2.The cell  3. Micro organism   4. Reproduction  5. Synthetic Material 6. Metal and non metals  7.Combustion and Flame  8.Force and Pressure Some of them are here Basic Science Question Answer Class 8 Bharati Bhawan Publication  Class 8 Metal and Non Metal                             Download File Class 8 Combustion and Fuel                             Download File Class 8 Electricity and Lighting                         Download File Class 8 Microorganisms Friend and Foe            Download File Click on Link Searches related to basic science for class 8 simple science experiments for class 8 basic science for class 7 basic science for class 6 basic 8th grade science Class VIII Mathematics  [Click on links given below] VIII Algebra VIII Commercial Maths VIII Geometry & Mensuration   CBSE Class VIII Science Physics

CBSE/NCERT_Metals and Non Metal Questions answer class 8 Very short answer questions 1. What is malleability? Ans: Metal can be beaten into thin sheet. this properties oh metal is called malleability. Gold is the most malleable metal. 2. Name a metal exist in liquid state Ans: Mercury is a metal that exist in liquid state at room temperature. 3. Which metal is the best conductor of electricity? Ans: Silver 4. Name the metals ha highest melting pint. Ans: Tungsten 5. Name the lightest metal Ans: Lithium 6. Which is the only non metal that can conduct electricity? Ans: Graphite 7. Name the two non metals that are lustrous Ans : Graphite and iodine 8. What are allotropes? Ans: Two or more form of same element which differ in properties. Diamond and graphite are two allotropes of carbon Write true and false 1. Metals react with oxygen to form oxide: False Metals react with oxygen to form metallic oxide 2. Magnesium and aluminium react quickly

Q. Viruses are considered as being on the border line between living and non-living organisms,Why? Ans: Viruses is nonliving out side living cells but grows and multiplies inside living cell so,viruses are considered as being on the border line between living and non-living organisms.The study of viruses is called Virology. Questions: What does Sargasso Sea woe its name to? Ans: Sargasso Sea woe its name to Sargassum, a particular sea weeds that grow abundantly in sea. Sailor avoids this sea as their boat stuck in the tangled mass of seaweeds. Questions: What are the difference between the cell of bacteria and the cell of other living body? Ans: The difference between the cell of bacteria and the cell of other living body are (i) Cell wall is not made up of cell wall (ii) Do not have nucleus (iii)Does not have membrane bound organelles Questions: Do red and brown algae have chlorophyll? Ans: Yes, red and brown algae have pigment of colour which cover the colour of ch

High order thinking skill [HOTS Questions] Learnwell science class 8 1. Why are women advised not to wear high heeled shoes? Ans: High heeled shoes do not distribute weight of body over the surface of and therefore women may fall on the ground due to less grips on ground. This is why women are advised not to wear high heeled shoes. 2. It is more difficult to pull boat on the beach than on the water? Ans: Liquid and gases exert lesser friction as compared to solid surfaces. Therefore, boat on the beach experience more friction than on the water. Thus, it is more difficult to pull boat on the beach than on the water. 3. How are you able to drink juice using a straw? Ans: When we suck air from straw the air pressure in the straw decreases that is enough to pull the juice. Air pressure pull the juice to move up inside the straw into our mouth . 4. Why is the tip of sewing needle sharp? Ans: The sharp tip of sewing needle sharp distributes force over less are so tha

Trend Setter Basic Science Publication - Bharati Bhawan Solutions Very Short Answer type Questions A1.Is light year a unit of time or distance? Define `1 light year? Ans: Light year is a unit of distance .one light year is a distance covered by light in 1 year. A2.What is the source of stars energy? Ans: The source of stars energy is nuclear fusion in which hydrogen atoms split up into helium atoms and large amount of energy is librated. A3.What gives galaxies different shapes? Name a few common shapes of galaxies. Ans: The  arrangement  of stars gives galaxies different shapes of galaxies. About 100 billians galaxies in the universe some of them are in shape of spiral, ring like or elliptical. A4.What is the big Dipper? Ans: The seven brightest stars in between the month of February and may form a shape of dipper in northern sky. This constellation  is called Big deeper or Saptarshi. A5. Why are Mercury venues, and Mars called terrestrial planets? Ans: This is because t