Sets
Chemistry Set 12
30 questions 1. Consider the following statements:
(I) In a mixture of iron filings and sulfur powder, the iron is attracted by a magnet.
(II) Iron sulfide is attracted by a magnet.
(III) Iron and sulfur can no longer be separated in iron sulfide.
Which of the above is/are correct?
2. Milk of magnesia, a mild base used as an antacid, is chemically:
3. The regular, repeating three-dimensional arrangement of ions in an ionic compound is called its:
4. According to Dalton, during a chemical reaction atoms are merely:
5. The maximum amount of solute that dissolves in a fixed quantity of solvent at a particular temperature is called its:
6. Consider the following statements:
(I) Mendeleev and Lothar Meyer, working independently, proposed in 1869 that similarities in properties appear at regular intervals when elements are arranged in increasing atomic weights.
(II) Lothar Meyer's work was published before the work of Mendeleev.
(III) Mendeleev is generally credited with the development of the Modern Periodic Table.
Which of the above is/are correct?
7. The molar mass of sodium chloride is:
8. Baking powder is a mixture of baking soda and:
9. The difference in molecular mass between ethane (C₂H₆) and propane (C₃H₈), taking atomic masses of C = 12 u and H = 1 u, is:
10. The Davy Medal was awarded in 1887 by the Royal Society, London, to:
11. A gross consists of:
12. Water vapour rises in the atmosphere because it is:
13. Materials having a lustrous appearance are usually:
14. The unique ability of carbon to form bonds with other carbon atoms, giving large molecules, is called:
15. Blood is classified as a:
16. Magnesium burns in air with a:
17. In a solution formed by dissolving a solid in a liquid, the solid component is called the:
18. Metals in the middle of the reactivity series, such as zinc, iron and lead, are found in the earth's crust mainly as:
19. Home-made ORS is prepared by mixing common salt and sugar in one litre of boiled and cooled water. The amount of sugar used is:
20. In churning of curd, butter separates at the top because it is: