Part 1
Video Solution
The atomic theory of matter was proposed by:
A. John Kennedy
B. Lavoisier
C. Proust
D. John Dalton
Ans d
The symbol of a metal element which is used in making thermometers is:
A. Ag
B. Hg
C. Mg
D. Sg
Ans b
The Latin language name of an element is natrium. The English name of this
element is:
A. sodium
B. potassium
C. magnesium
D. sulphur
Ans a
The English name of an element is potassium, its Latin name will be:
A. plumbum
B. cuprum
C. kalium
D. natrium
Ans c..
The law of conservation of mass was given by:
A. Dalton
B. Proust
C. Lavoisier
D. Berzelius
Ans c
The law of constant proportions was given by:
A. Proust
B. Lavoisier
C. Dalton
D. Berzelius
Ans a..
One nm is equal to:
A. 10-⁹ mm
B. 10 -⁷ cm
C. 10 -⁹ cm
D. 10 -⁶ m
Ans b
The scientist who proposed the letter (or first letter and another letter) of the Latin or English name of an element as its symbol, was:
A. Dalton
B. Proust
C. Lavoisier
D. Berzelius
Ans d
The atoms of which of the following pair of elements are most likely to exist in free state?
A. hydrogen and helium
B. argon and carbon
C. neon and nitrogen
D. helium and neon
Ans d
Which of the following elements has the same molecular mass as its atomic
mass?
A. nitrogen
B. neon
C. oxygen
D. chlorine
Ans b
One of the following elements has an atomicity of ‘one’. This element is:
A. helium
B. hydrogen
C. sulphur
D. ozone
Answer a
The atomicity of helium is 1. It is a noble gas.
Part 2
Video Solution
The standard unit of mass of subatomic particles is:
(a) kg (b) coulombs (c) mg (d) amu
Ans d
The symbol of Lead and Mercury are respectively
(a) Hg, Pb (b) Pb, Hg (c) Le, Me (d) Ld, My
Ans b
The atomicity of an element tells about
(a) physical properties
(b) number of electrons
(c) number of atoms in one molecule
(d) Its combining capacity
Ans c
The molecular formula is a short form representation of
(a) a compound (b) an element
(c) a mixture (d) an alloy
Ans a
Weight of one gram atom=
(a) At. Wt. expressed in grams (b) The weight in grams of one atom
(c) Atoms present in 1 gm (d) none of these
Ans a
Weight of one gram molecule =
(a) The weight in grams of one molecule
(b) Molecule present in 1 gm
(c) Mol.. Wt. expressed in grams
(d) none of these
Ans b
If two elements combine to form two or more compounds they obey
(a) Law of Conservation of Mass (b) Law of Definite proportion
(c) Law of Multiple Proportion (c) all three laws
Ans d
A balanced equation is a direct consequence of
(a) Law of Multiple Proportion (b) Law of Conservation of Mass
(c) Law of Definite proportion (d) none of these
Ans b
A symbol of an element does not convey information about
(a) atomic number (b) atomic weight
(c) mass number (d) all three options (a, b and (c)
Ans d
The number of atoms present in a molecule of
a substance is called
(a) molecularity (b) atomicity
(c) valency (d) reactivity
Ans b
The amount of a substance is measured in
(a) mole (b) kilogram
(c) seconds (d) gram.
Ans a
A chemical equation is always balanced to
fulfill the condition of
(a) Dalton's atomic theory
(b) Law of constant composition
(c) Law of multiple proportions
(d) Law of conservation of mass
Ans d
Other's MCQs Question chapter
0 Comments