Chemistry Mcqs 02
Which metal is most reactive?GoldSilverPotassiumCopperC) PotassiumPotassium is highly reactive, especially with water.
Which acid is produced in the stomach? Sulphuric acid Hydrochloric acid Nitric acidAcetic acidB) Hydrochloric acid HCl aids digestion in the stomach.
What is the lightest gas?OxygenHeliumHydrogenNitrogenC) Hydrogen Hydrogen is the lightest element and gas.
Which of the following is a halogen?Chlorine) Calcium Copper Carbon A) ChlorineChlorine is a halogen found in Group 17.
What is the formula of sulphuric acid?HCl H2SO4 HNO3CH3COOH B) H2SO4 Sulphuric acid has the formula H2SO4.
. What is the formula of ammonia? NH3 HNO3NaOHCO2A) NH3: Ammonia has the formula NH3.
Which gas is known as laughing gas? CO2 NO2N2OSO2 C) N2O Nitrous oxide (N2O) is called laughing gas.
Which metal is used to make thermometers?CopperZinc Mercury SilverC) MercuryMercury is liquid and used in thermometers.
Which metal is liquid at room temperature? Gallium Sodium Mercury Aluminum C) Mercury Mercury is a liquid metal at room temperature.
The nucleus of an atom contains:ElectronsProtons and neutronsOnly protons Only neutrons B) Protons and neutrons The nucleus is made of protons and neutrons.
Rust is chemically known as: Iron chloride Iron sulphide Iron oxide Iron nitrateC) Iron oxide Rust is iron oxide formed by iron reacting with oxygen and water.
The atomic number of oxygen is:6 7 810 C) 8 Oxygen has 8 protons.
The most abundant gas in Earth’s atmosphere is:Oxygen NitrogenCarbon dioxide ArgonB) Nitrogen Nitrogen makes up about 78% of Earth's atmosphere.
Which is the hardest natural substance?Diamond Iron QuartzGraphite A) Diamond Diamond is the hardest known natural material.
The metal used in making aircrafts is:IronCopperAluminum Zinc C) Aluminum Aluminum is lightweight and used in aircraft.