GENERAL INSTRUCTIONS (Please read the following instructions very carefully)
1. Question marks are mentioned with each Question.
2. Please write neat and clean hand-writing on Answer Sheet. Use Margin on right side and left side of Answer Sheet.
3. Do not refresh or back page.
4. Do not click the button Submit Test before completing the paper on Answer Sheet.
5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
6. Take photo of all the Sheets and make single pdf file.
1
____________ of the following is not an example of the Law of Chemical combination.
The Law of conservation of Mass or Matter
The Law of Constant or Definite Proportion
Gay's Lussac's law of Gaseous Volume
Pascals Law
2
What is the relative atomic mass of Chlorine ?
35
35.5
36
37
3
Which of the following is the Molecule of element ?
H
He
Be
C
4
Which of the following metal can sometimes be found in free state ?
Fe
Na
Au
Zn
5
The smallest particle of an element or compound which is capable of independent existence and shows all the properties of that substance is called a _________.
Atom
Molecule
Ion
None of these
6
What is the formula of calcium oxide ?
CaO
CaO2
Ca(OH)2
CO2
7
Which of the following is a divalent element ?
Hydrogen
Oxygen
Boron
Carbon
8
If 2.0 g of sodium carbonate reacts with 5 g of hydrochloric acid, it results in the formation of 2 g of carbon dioxide and 5 g of sodium chloride solution. Show that these results are in accordance with the law of conservation of mass.
Reactants and products are having equal mass.
Reactants and products are having unequal mass.
Reactants and products are different
Reactants and products are same always
9
Which of the following are the categories of molecule ?
Molecules of Elements
Molecules of Compounds
Both (a) and (b)
10
Which of the following are correct :
(a) Na+ is a cation.
(b) Cl- is a cation.
(c) O2- is a anion.
(d) He is a cation.
Only (a) and (b) are correct.
Only (b) and (c) are correct.
Only (c) and (d) are correct.
Only (a) and (c) are correct.
11
Which of the following are formed by the one atom?
(a) Water
(b) Gold
(c) Salt
(d) Iron
Only (b) and (d) are correct.
Only (a) and (d) are correct.
12
(a) The molecule of carbon dioxide and Water are similar.
(b) The molecule of carbon dioxide and Water are different.
(c) The molecules of ammonia contains Nitrogen only.
Only (a) and (b) are correct
Only (b) is correct.
Only (c) is correct.
Only (a) is correct.
13
Which of the following statement/ statements are correct :
(a) He is an elementary molecule.
(b) Ar is an elementary molecule.
(c) O2 contains atoms of Oxygen.
All of these.
14
Which of the following statement / statements are correct :
(a) Copper have variable valency.
(b) Oxygen do not have variable valency.
(c) Neon have variable valency.
(d) Iron have variable valency.
(a)-T, (b)-T, (c)-T, (d)-T
(a)-T, (b)-T, (c)-T, (d)-F
(a)-T, (b)-T, (c)-F, (d)-F
(a)-T, (b)-T, (c)-F, (d)-T
15
Identify the Main Postulates of Dalton’s Atomic Theory
(a) Every matter is made up of very small particles, called the molecules.
(b) Atoms are indivisible particles which can be created and destroyed in a chemical reaction.
(c) Atoms of a given element are identical in mass as well as in chemical properties.
(d) Atoms of different elements have different masses and chemical properties.
(e) Atoms combine in the ratio of small whole numbers to form compounds.
(a), (b), (c) are correct.
(c),(d),(e) are correct
(a),(d),(e) are correct.
(b),(c),(d) are correct.