Hydrocarbons – Old Year Questions
1. Which one of the following is the correct sequential order in which these appeared under simulated primitive earth conditions? […]...
Acid, Base and Salt – Old Year Questions
1. Antacids are – (a) Base (b) Acid (c) Salt (d) Buffer (e) None of these [Chhattisgarh P.C.S. (Pre) 2016] […]...
Sulphur, Nitrogen, Halogen, Inert Gases – Old Year Questions
1. Which gas is known as ‘noble gas’? (a) Hydrogen (b) Oxygen (c) Helium (d) Carbon dioxide [M.P. P.C.S. (Pre) […]...
Hydrogen and its Compounds – Old Year Questions
1. An element X has four electrons in its outermost orbit. What will be the formula of its compounds with […]...
Carbon and its Various Forms – Old Year Questions
1. Which one of the following elements forms the maximum number of compounds? (a) Hydrogen (b) Carbon (c) Nitrogen (d) […]...
Alloys – Old Year Questions
List of alloys, their compositions, and uses Steel Composition: Iron (Fe) + Carbon (C) + other elements like Manganese (Mn), […]...
Metals, Minerals, Ores : Properties, Uses – Old Year Questions
1. Which of the following is the electron configuration of a metallic element? (a) 2, 8 (b) 2, 8, 7 […]...
Inorganic Chemistry – Old Year Questions
1. UNESCO inaugurated the celebration of 2019 as the International Year of the Periodic Table of Chemical Elements to celebrate […]...
Science Prelims Old Year Questions and Answers
हिंदी में पढ़ें Biology Biology: Branches & Terminologies Evolution of Life on Earth Taxonomy: Classification of Organism Cytology: Study of […]...
Physical and Chemical Changes, Solution – Old Year Questions
1. An example of physical change – (a) Blackening of silverware (b) Burning of Candle (c) Making of curd from […]...