GENERAL SCIENCE (CHEMISTRY) QUESTIONS 2018
1) The atomic radius is measured in ________
a) Millimetre
b) Metre
c) Picometre
d) Nanometre
e) Mass
2) The amount of a substance whose mass in grams is numerically equal to its _______is called gram atomic mass.
a) Atomic mass
b) Molecular mass
c) Both a and b
d) Molar mass
e) None of these
3) Chemical formula is also known as________
a) Atomic formula
b) Molecular formula
c) Basic formula
d) both b and c
e) None of these
4) Mass of one molecule of substance to the 1/12 th mass of one atom of C-12 is known as______
a) Intramolecular mass
b) Molecular mass
c) Atomic mass
d) Intermolecular mass
e) None of these
5) A positively charged ion is known as______
a) Cations
b) Anions
c) Ions
d) Atoms
e) None of these
6) A negatively charged ion is known as _______
a) Ions
b) Cations
c) Anions
d) Atoms
e) None of these
7) The combining power of an element is known as its ______
a) Valency
b) Ions
c) latency
d) both a and c
e) None of these
8) ______ is a link between the mass of atoms and the number of atoms.
a) Molar
b) Molecule
c) Mole
d) Latency
e) None of these
9) One mole of atoms is equal to_______ atoms
a) 6.022 x 10^30
b) 6.022 x 10^25
c) 6.022 x 10^20
d) 6.022 x 10^21
e) 6.022 x 10^23
10) Atoms are made up of three subatomic particles. They are_____
a) Electron
b) Proton
c) Neutron
d) All of the above
e) None of these
Answer Keys
- 1) d) Nanometre
- 2) a) Atomic mass
- 3) b) Molecular formula
- 4) b) Molecular mass
- 5) a) Cations
- 6) c) Anions
- 7) a) Valency
- 8) c) Mole
- 9) e) 6.022 x 10^23
- 10) d) All of the above
