[6] 8. Match the following substances with type os substances: Substance Sodium hydroxide Water Lemon juice Type of Substance Neutral Acid Alkali [3] 9. Write ‘True’ for the statements you consider as true and ‘False’ for the incorrect statement: (a) Universal Indicator changes colour and shows the pH of a substance ……..…………….. (b) A pH …
Materials Iron Chlorine Plastics Carbon rubber metal Conductors shiny Glass electricity transparent Cooking pans Use the given words to fill the blanks: Multiple Options: True and False Statements: Short Answers:
(a) Which one of these diagrams shows the electronic structure of Aluminium (Al): (b) How many electrons are there in Aluminium? (c) How many protons and neutrons are there in Aluminum, if the mass number of Aluminium is approximately 27? 10. Periodic table shows the elements in order of their ……………………………………number. 11. Hydrogen forms positive …
A. Single Displacement ReactionB. Double Displacement ReactionC. Synthesis ReactionD. Decomposition Reaction A. Decomposition ReactionB. Single Displacement ReactionC. Double Displacement ReactionD. Synthesis Reaction A. Single Displacement ReactionB. Double Displacement ReactionC. Synthesis ReactionD. Decomposition Reaction A. Single Displacement ReactionB. Double Displacement ReactionC. Synthesis ReactionD. Decomposition Reaction A. CH4 and CO2B. CH4 and O2C. CO2 and H2OD. O2 …
Also prepare a table of Elements with symbols that have different their Greek/Latin/German name.
1. The property of elements showing similar properties at a regular interval is called ………………………………. 2. Periodic table shows elements in order of their ……………………… number. 3. How much percentage of elements in a Periodic table are non-metals? (a) More than 80% (b) Less than 20% (c) 50% (d) 60% 4. Element that form + …
(a) The protons (b) The nucleus (c) The electrons 2. What is the charge on an electron? (a) One positive (b) No charge (c) One negative 3. Which of the three sub-atomic particles is the lightest? (a) The proton (b) The neutron (c) The electron 4. If atoms contain charged particles, why do they not …
1. What does corrosive mean? 2. How would you test a substance, to see if it is an acid? 3. Write down the formula for: sulfuric acid, nitric acid, calcium hydroxide, and ammonia solution 4. Phenolpthalein is an indicator. What does that mean? 5. What does this pH value tell you about the solution? a …