WorksheetsAtoms and Molecules , IX (Session - 1)
Total questions: 18
Worksheet time: 29mins
Name :
Class : IX-D
Molecules can be termed as ? (Generally)
*Choose the most appropriate option -
Cluster of Elements
Cluster of Compounds
Cluster of Mixtures
Cluster of Atoms
Molecular Mass of Glucose (C6H12O6).
100 grams/Mole
(Approx)
110 grams / Mole (Approx)
180 grams/Mole
(Approx)
0.8809 gram/Mole
(Approx)
A sample of NH3 molecule irrespective of source contains 82.35% Nitrogen and 17.65% of Hydrogen by mass.
QUESTION : The above data/extract/source supports which of the following law ?
Law of Conservation of Mass
Law of Constant Proportion
Dalton's Atomic Postulate
Law of conservation of Momentum
Molecular Formula of Aluminium Hydroxide
Al(HO)-3
Al(OH)3
H2Al3
All (a),(b) and (c)
Atomic Symbol of Gold
(Only type the Answer i.e. - for sodium "Na" is the answer")
(a)
Chemical formula of Silver
(a)
Name the element X
Al
Zn
Cl
H
Number of proton and electron in element X
Proton : 13
Electron : 13
Proton : 13
Electron : 10
Proton : X
Electron : Y
Proton : X
Electron : X
Atomic Mass of H,C,O
*Choose the correct option in order
(16,12,0)u
(1,12,16)u
(1,1,100)amu
X g
1) Law of Constant proportions was founded by?
2) Who established two important laws of Chemical Combination?
3) Founder of Dalton Atomic Theorem?
4) Who termed the atoms as indivisible particles for first time?
*Choose the most appropriate option in order to above illustrated Questions
1) Proust
2) Lavoisier
3) Padartha
4) Robert Hooke
1) Proust
2) Lavoisier
3) Jhon Dalton
4) Democritus
1) Proust
2) Lavoisier
3) John Dalton
4) Democritus and Joseph
1) Proust
2) Lavoisier
3) John Dalton
4) Democritus
ASSERTION : Water molecules always contain Hydrogen and Oxygen in the Ratio 1:8 .
REASON : Water obeys the law of i.e. proposed by dalton.
A and R both are correct and R is correct explanation of A
A and R both are correct but R is not correct explanation of A
A is true but R is false
A is false but R is false
ASSERTION : Law of conservation of mass holds good for all the reactions
REASON : It states that energy can neither be created nor be distroyed in an chemical reaction.
A and R both are true and R is correct explanation of A
A and R both are true but R is not correct explanation of A
A is true but R i false
A is false but R is true
Which of the following Illustrations is most appropriate for element Oxygen(O)
Atomic number of Magnesium .
1) Number Valance shell and Electron in Nitrogen atom.
*Choose the most appropriate option
2) Electronic configuration of element Ar
3) Valency of element P
1) L shell , 5
2) 2,8,8,1
3) 3
1) L shell , 5
2) 2,8,8,-
3) 3,5
1) L shell , 5
2) 2,2,8,8
3) X
1) L shell , 6
2) 2,8,8,0
3) 3,0
In the above Illustration the atom possess which charge?
6 P+
4 E-
i.e. Positive Charge
4 P+
6 E-
i.e Negative Charge
Both (a) and (b)
None of the above
Thank You
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