ABU Chemistry 2016/2017 Past Questions

Practice each question, then open it to see the full details.

Which of the following in a molar solution would be the product conductor of electricity?

A.Ammonia
B.Sodium chloride
C.hydrochloric acid
D.zinc tetraoxosulphte(vi)

How many moles of oxygen atoms are presented in 4.0g of the gas.(O = 16)

A.0.25
B.0.50
C.1.00
D.4.00

In the periodic table, the entire element within the same group has the same

A.atomic number
B.number of electrons in the nuclei of their atoms
C.number of electron available for bonding
D.number of isotopes

How many atoms are there in 0.3 mole of an element?[Avogadro's constant = 6.0 × 10²³]

A.2.0 × 10²⁴
B.1.6 × 10²⁴
C.1.8 × 10²³
D.3.0 × 10²⁴

Milk exposed to air for a few days tastes sour due to the presence of

A.Ethanoic acid
B.Citric acid
C.lactc acid
D.tartanc acid

A substance which produces the hydroxonium ion as the only positive ion when dissloved in water is

A.An acid
B.an acid salt
C.a normal salt
D.a base

Petrol can be obtained from fuel oil by

A.hydrolysis
B.hydrogenation
C.dehydration
D.cracking

Which of the following is not true of metals?

A.they are good conductors of heat and electricity
B.they are ductile and malleable
C.their oxides are basic
D.they can be used as insulators

Which of the following is not a property of chlorine?

A.It is greenish yellow and has a choking smell
B.it bleaches litmus paper
C.it is a liquid at room temperature and pressure
D.it has a higher density than air

If calcium has atomic number 20 and mass number 40. the constituent of the atom is

A.20 protons, 10 neutrons and 10 electrons
B.20 protons, 20 neutrons and 20 electrons
C.20 protons, 20 neutrons and no electrons
D.10 protons, 10 neutrons and 20 electrons