MCQ Atoms and Molecules Chapter 3 Class 9 Science Advertisement MCQ’s For All Chapters – Science Class 9th 1. Phosphate ion has symbolPO₄³⁻PO₃²⁻PO₄²⁻P₂O₅Question 1 of 152. Valency of calcium is1234Question 2 of 153. Formula of potassium sulphate isKSO₄K₂SO₄K₃SO₄K₂S₂O₈Question 3 of 154. Quicklime is chemicallyCaOCaCO₃Ca(OH)₂CaSO₄Question 4 of 155. Baking powder containsSodium chlorideSodium bicarbonateSodium sulphateSodium carbonateQuestion 5 of 156. Hydrogen bromide contains elementsHydrogen and bromineHydrogen and oxygenHydrogen and chlorineBromine onlyQuestion 6 of 157. Molar mass of hydrochloric acid (HCl) is34 u35.5 u36.5 u38 uQuestion 7 of 158. Molar mass of nitric acid (HNO₃) is62 u63 u64 u65 uQuestion 8 of 159. Sulphur molecule (S₈) has molecular mass16 u32 u128 u256 uQuestion 9 of 1510. The concept of atomic mass was first proposed byDaltonLavoisierRutherfordThomsonQuestion 10 of 1511. The scientist who used specific symbols for elements for the first time wasDaltonProustLavoisierRutherfordQuestion 11 of 1512. The organization that approves the names and symbols of elements isUNESCOIUPACWHOISROQuestion 12 of 1513. Which one of the following is a monoatomic element?OxygenNitrogenHeliumSulphurQuestion 13 of 1514. The simplest compounds made up of two elements are calledMixturesBinary compoundsTernary compoundsPolyatomic compoundsQuestion 14 of 1515. The molecular mass of carbon dioxide (CO₂) is42 u44 u46 u48 uQuestion 15 of 15 Loading...
Super duper questions but the number of questions can be increased
2/5×2/2=4/10=0.4