Entry Test MCQs OF Chemistry Chapter 1st

Here is your first test Chemistry Chapter 1 MCQs Test. Keep in touch with our MCQs  Tests released periodically.

1- isotopes are sister atoms of same element with similar chemical properties but different
(a) atomic number
(b)atomic volume
(c)atomic mass
(d)atomic structure

2-cadmium has isotopes
a-3
b-6

c-9
d-12

3-atomic masses of elements were determined by
a-john Dalton
b-Berzelius
c-Avogadro
d-Democritus

4-what is the mass of one mole of Iodine molecule.

a-53
b-74
c-250
d-254

5-in combustion analysis CO2 is absorbed in
a-mg(ClO4)2
b-lime water
c-concentrated H2SO
d-50%KOH

6-the collection of Avogadro no of [articles represent
a-molecule
b-empirical formula
c-formula unit
d-mole

7-CO+ is an example of

a-free radical
b-cationic molecular ion
c-stable molecule
d-anionic molecular ion

8-which of the following has the max num of moles
a-1g of H2O
B-40g of H2O
C-36g of H2O
d- none

9-%of O2 in H2O is
a-80%
b-88.8%
c-70%
d-none

10-the SI unit of measurement of  quantity is
a-atom
b-formula
c-mole
d-molecule

11-what quantity of limestone CaCO3 on heating will give 56kg of CaO
a-1000kg
b-100kg
c-60kg
d-all

12-how many moles of hydrogen occupy 22.4dm3of Volume at S.T.P are

a-0.1
b-0.90
c-1.0
d-none

13-the largest number of molecules in
a-36g of H2O
B-46g of C2H5OH
c-28g of CO2
d-all

14-the %of o2 in NaOH is
a-16
b-32
c-64
d-40

15-which of the following has least mass
a-2g of O2
b-1mole of Na
c-3*10²³atom
s of carbon
d-8g of Ag