16/12/2019Atoms, Compounds and Mixtures (STUDY BY TOPICS JUNIOR CLASS) 0Comments by Gate Academy Welcome to your Atoms, Compounds and Mixtures (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. Methane has the following properties except a. one carbon four hydrogen all of the above two oxygen2. Which of the following sets of substances represents mixtures only? Brass, seawater and air Gold, carbon and air Air, blood and sodium chloride Orange juice, sodium and hydrogen3. How many neutrons does the element of atomic number 1 and mass number 1 have? 2 1 0 None of other mentioned values4. The period in which an element is located gives us the number of electron shells that the electron has. the number of electrons in its outer shell. the number of neutrons in that element. the electronic configuration of that element.5. The amount of a substance that can exist separately is called molecule atom formulae entity6. When a substance is analysed using an electron microscope, it is found to contain only one type of atom.This substance is a compound a mixture an element neither of the other three7. Which component of atom is negatively charged neutron isotron electron proton8. Water is a compound made up of two different elements. These elements are Hydrogen and oxygen Sodium and chlorine Oxygen and iro Hydrogen and nitrogen9. Which one of the following elements is used in party balloons? Nitrogen Neon Oxygen Helium10. The chemical symbol of gold is Ag Au Al Ad11. Which one of the following is the chemical symbol for nitrogen? K Nit Ne N12. The chemical symbol of zinc is Zc Zn Z Zi13. The following determine atomic no except none of the above proton electron neutron14. If a substance consists of more than one type of atom chemically combined, then it is a mixture an element a molecule a compound15. Approximately how many elements are there on earth? 1000 100 20 1016. Which one of the following represents the compound called carbon dioxide? CO CO2 C H2O17. How many different types of atom may be present in a compound? Two or more different types Exactly four different atom types Three or more different atom types Only one type of atom18. If an element has an atomic number of 9 and a mass number of 19, then, which of the following statements is INCORRECT? There are 10 neutrons in its nucleus. There are 9 electrons orbitting around its nucleus. Its got 9 protons and 9 electrons. Its got 10 electrons and 9 neutrons.19. The following are products of fractional distillation of crude oil except octane bitumen naphta kerosene20. Which of the following pairs of properties is correct for the proton? Its got a charge of +1 and normally found outside the nucleus. Its got a charge of -1 and normally found inside the nucleus of an atom. Its got no charge and normally found inside the nucleus. Its got a charge of +1 and normally found inside the nucleus.21 out of 20Time is Up!
