Chemistry Quiz

A substance is said to be hygroscopic if it absorbs

• moisture from the atmosphere without dissolving in it

• heat from the surrounding

• carbon (IV) oxide from the atmosphere

• water from the atmosphere to form solution

Which of the following movements can be described as random motion?

• A wheelbarrow being pushed around

• A car travelling in a straight line

• Gas molecule colliding in a flask

• Planets going round the sun

A major factor considered in selecting a suitable method for preparing a simple salt is its _______.

• crystalline form

• melting point

• reactivity with dilute acids

• solubility in water

 Carbon dioxide is an acidic oxide that reacts with aqueous calcium hydroxide. Which type of reaction takes place?

• Decomposition

• Fermentation

• Neutralization

• Oxidation

Four elements P, Q, R and S have 1, 2, 3 and 7 electrons in their outermost shells respectively. The element which is unlikely to be a metal is?

• P

• Q

• R

• S

What happens to the kinetic energy of the particles in a sample of gas as the temperature of the sample increases?

• It increases, then decreases

• It does not change

• It increases

• It decreases

The temperature at which the motion of particles theoretically ceases is __________

• 273 K

• -273 K

• 0 K

The number of hydroxonium ions produced by one molecule of an acid in aqueous solution is its _________.

• basicity

• acid strength

• pH

• concentration

The chromatographic separation of ink is based on the ability of the components to

• dissolve in each other in the column

• move at different speeds in the column

• react with the solvent

• react with each other

Which of the following acids CANNOT form acidic salt?

• tetraoxosulphate (IV) acid

• trioxonitrate (V)

• trioxocarbonate (IV)

• trioxosulphate (IV)