Chemistry Quiz - 2, General Knowledge - Current Affairs MCQ

The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is

The most malleable metal is

The oil used in the froth floatation process is

The number of waves in n x 10^th Bohr's orbit are

The mass of one Avogadro number of helium atom is

The items amenable to detection by soft x-rays are

The material which can be deformed permanently by heat and pressure is called a

The mass number of a nucleus is

The inexpensive and commonly used variety of glass is called soda glass. It is called so because

The gas used in the manufacture of vanaspati from vegetable oil is

The ionic radii of N^3-, O^2-, F^- and Na⁺ follows the order

The graphite rods in the nuclear reactor

The first metal used by man was

The hydronium ion is

The most electropositive elements among the following is

The method that cannot be used for removing permanent hardness of water is

The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

The gas used for artificial ripening of green fruit is

Zone refining is used for the purification of

The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is

The molecule which has the highest percentage of ionic character among the following is

The molecular formula of phosphorous is