Hello Aspirants. Welcome to Online General Knowledge section in Affairs cloud, which is important for all the competitive exams. We have created Some questions related to General Science(Chemistry) !!!
- Which one of the following is the largest composition of Coal gas ?
1.Nitrogen
2.Hydrogen
3.Methane
4.Oxygen
5.None of theseAnswer – 3.Methane
Explanation :
Methane, Carbon Monoxide and Hydrogen are the major constituent in coal gas - …………………….. is/ are an allotrope of carbon
1.Graphene
2.Diamond
3.Graphite
4.Fullerenes
5.All of theseAnswer – 5.All of these
Explanation :
The allotropes of carbon include diamond (where the carbon atoms are bonded together in a tetrahedral lattice arrangement),graphite (where the carbon atoms are bonded together in sheets of a hexagonal lattice),graphene (single sheets of graphite), and fullerenes (where the carbon atoms are bonded - The yellow colour of Topaz crystal is due to the presence of …………………….
1.Ferrous Oxide
2.Nitrogen Oxide
3.Calcium Oxide
4.Aluminum fluorosilicate
5.None of theseAnswer – 4. Aluminum fluorosilicate
Explanation :
The yellow colour of Topaz crystal is due to the presence of Aluminum fluorosilicate - A mixture of ……………. % of Oxygen and ………% of Carbon-di-oxide is called carbogen
1.80,20
2.5,90
3.95,5
4.35,65
5.None of theseAnswer – 3.95,5
Explanation :
Carbogen, also called Meduna’s Mixture after its inventor Ladislas Meduna, is a mixture of carbon dioxide and oxygen gas. A carbogen mixture of 95% oxygen and 5% carbon dioxide used - Which inert gas is present in the atmospheric air in negligible quantity?
1.Argon
2.Helium
3.Neon
4.Radon
5.None of theseAnswer – 4.Radon
Explanation :
Radon is a chemical element with symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas, occurring naturally as a decay product of radium - Limestone added as …………………. in the extraction of iron
1.Flux
2.Slag
3.Gangue
4.Catalyst
5.None of theseAnswer – 1.Flux
Explanation :
Limestone used as a flux which is used to remove impurities (such as silica (SiO2)) in the ore to forms a slag which melts and collects above the iron at the bottom of the furnace. - Starch Iodide paper is used for the test of ………………..
1.Reducing agent
2.Oxidizing agent
3.Chlorine
4.Nitrogenoxides
5.None of theseAnswer – 2.Oxidizing agent
Explanation :
Starch iodide paper is an indicator for strong oxidising agents - …………….. was the first organic compound to be synthesized in laboratory from non-living sources
1.Etahne
2.Alcohol
3.Ether
4.Urea
5.None of theseAnswer – 4.Urea
Explanation :
Urea was the first organic compound to be prepared in lab - Solder is an alloy of ………………..
1.Copper and Tin
2.Copper and Zinc
3.Lead and Tin
4.Copper and Zinc
5.None of theseAnswer – 3.Lead and Tin
Explanation :
Electrical solder is an alloy of tin and lead. Solder can be made by heating together the metals lead and tin - Calorific Value of wood is ………………….
1.17 kJ/g
2.27 kJ/g
3.42 kJ/g
4.35 kJ/g
5.None of theseAnswer –1.17 kJ/g
Explanation :
Calorific Value of wood is 17-18 kJ/g
AffairsCloud Recommends Oliveboard Mock Test
AffairsCloud Ebook - Support Us to Grow
Govt Jobs by Category
Bank Jobs Notification