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 …
Month: January 2023
I have been using technology in my teaching for many years now. I began by using laptops, projectors, cpu’s and tablets in my classroom to facilitate learning. This allowed my students to access online resources such as videos, audio, and other electronic media. I also found that the use of technology in the classroom allowed …
I was struggling to decide whether I should use gardening or agriculture for the title. I came up with the word “farming”, it looks suitable for me which I will share. During the lockdowns and situation of job loss, a large number of people moved to learn gardening. They created a beautiful small garden in …
Metals are not available naturally in the form that we use. They are extracted from their ores. Metals and their ores are shown in the table below: S.No Metal Ores 1 Sodium(Na) Chile saltpetreTronaBoraxCommon salt 2 Aluminium(Al) BauxiteCorundumFeldsparCryoliteAluniteKaolin 3 Potassium(K) Nitrate(saltpetre)Carnalite 4 Magnesium(Mg) MagnesiteDolomiteEpsom saltKieseriteCarnalite 5 Calcium(Ca) DolomiteCalciteGypsumFluorsparAsbestos 6 Strontium(Sr) StrontianiteSilestone 7 Copper(Cu) CupriteCopper glanceCopper …
1. Calcium Carbonate Formula: CaCO3 Uses: Non-prescription drug for relief from acid indigestion and heartburn. It is also considered as a calcium supplement. 2. Sodium Chloride Formula: NaCl Uses: Used to season food (during food preparation and at the table), also used in the past as a method of food preservation. 3. Methane Formula: CH4 Uses: natural gas, fuel (also called …
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Which of the following is an element? (A) Diamond (B) Emerald (C) Sapphire (D) Ruby Answer: A (Graphite and Diamond are allotropes of Carbon) The catalyst used in the production of ammonia by the Haber’s process is (A) Platinum (B) Molybdenum (C) Iron (D) Nickel Answer: B Which of the following is to be found …