Question : Which element precedes carbon in the modern periodic table?

Option 1: Boron

Option 2: Lithium

Option 3: Beryllium

Option 4: Magnesium

Question : What is the chemical name of table salt?

Option 1: Potassium bromide

Option 2: Potassium chloride

Option 3: Sodium chloride

Option 4: Sodium bromide

Question : Which chemical element from group 18 of the modern periodic table, whose atomic number is 10, contains a mixture of three stable isotopes commonly used to make signal and gas lasers and as refrigerators?

Option 1: Neon

Option 2: Oganesson

Option 3: Helium

Option 4: Radon

Question : Which of the following elements is the densest naturally occurring element?

Option 1: Palladium

Option 2: Iridium

Option 3: Ruthenium

Option 4: Osmium

Question : Which among the following is the primary constituent of pearls?

Option 1: Calcium sulphate

Option 2: Calcium carbonate

Option 3: Sodium bicarbonate

Option 4: Magnesium peroxide