Chemistry For Class IX (New Book ) - Chapter No. 1- Fundamentals of Chemistry - Multiple Choice Questions And Fill In The Blanks

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Chapter No.1 - Fundamentals of Chemistry
MCQs And Fill In The Blanks
Text Book Exercise

SECTION- A: MULTIPLE CHOICE QUESTIONS
Tick Mark (✓) the correct answer

1. The branch of Chemistry which deals with hydrocarbons:
(a) Industrial chemistry
(b) Inorganic chemistry
(c) Organic chemistry ✓
(d) Physical chemistry

2. The atomic mass of an element expressed in gram is:
(a) Gram molecular mass
(b) Gram atomic mass ✓
(c) Gram formula mass
(d) Mole

3. Which of the following can be separated by physical means?
(a) Mixture ✓
(b) Element
(c) Compound
(d) Substance

4 The molar mass of H₂SO₄ is:
(a) 98 a.m.u
(b) 9.8 gm
(c) 98 gm ✓
(d) 9.8 a.m.u

5. The Molecule consist of two atoms is:
(a) Monoatomic molecule
(b) Polyatomic molecule
(c) Hetero atomic molecule
(d) Di atomic molecule ✓

6. A formula that indicates actual number and type of atoms in a molecule is called:
(a) Chemical formula
(b) Empirical formula
(c) Molecular formula ✓
(d) Formula mass

7. Ethyl alcohol was prepared by:
(a) Ibne-Sina
(b) Al-Razi ✓
(c) Al-Beruni
(d) Jaber bin-Hayan

8. which of the following is Not a homo atomic:
(a) H
(b) NH₃ ✓
(c) H₂O ✓
(d) CO₂ ✓
(Note: H is only a homo atomic [homo: same] molecule, rest three are hetero atomic [hetero: different] molecules)

9. The Empirical formula of hydrogen peroxide is:
(a) H₂O₂
(b) HO ✓
(c) OH
(d) O₂H₂

10. A piece of matter in pure form is termed as:
(a) Redical
(b) Mixture
(c) Compound
(d) substance ✓

More MCQs From Chapters

11. Greek Scientist proposed idea of a substance as a combination of matter and form.

• Aristotle ✓
• Plato
• Democritus
• Cavendish

12. Greek Scientist describes theory of the Four Elements, fire, water, earth, air.

• Aristotle ✓
• Plato
• Democritus
• Cavendish

13. Greek Scientist proposed term ‘elements’ as composition of organic and inorganic bodies with particular shape:

• Aristotle
• Plato ✓
• Democritus
• Cavendish

14. Greek Scientist proposed the idea of atom, an indivisible particle of matter:

• Aristotle
• Plato
• Democritus ✓
• Cavendish

15. Densities of different substances was determined by:

• Al-Razi
• Al-Beruni ✓
• Ibne–Sina
• Jabir Ibne-Haiyan

16. Contributed in medicines, philosophy and astronomy.

• Al-Razi
• Al-Beruni
• Ibne–Sina ✓
• Jabir Ibne-Haiyan

17. The gaseous law was discovered by:

• Robert Boyle ✓
• J.Priesly
• John Dalton
• Eric Cornell

18. German scientist Scheele discovered:

• oxygen
• hydrogen
• chlorine ✓
• carbon

19. Cavendish discovered:

• oxygen
• hydrogen ✓
• chlorine
• carbon

20. Oxygen is one fifth of air was discovered by French scientist:

• Jacques Charles
• Petit
• Lavoisier ✓
• Mendeleve

21. Atomic theory of matter was proposed by English scientist:

• Lavoisier
• John Dalton ✓
• Cavendish
• Aristotle

22. water is composed of two parts hydrogen and one part oxygen by volume was discovered by:

• Robert Boyle
• John Dalton
• Gay-Lussac ✓
• Rutherford

23. Several chemical and physical properties of air and other gases was discovered by:

• Robert Boyle
• John Dalton
• Gay-Lussac ✓
• Rutherford

24. Jacques Charles described the:

• Gaseous law ✓
• Avogadro’s law
• Atomic theory of matter
• Quantum theory

25. Periodic arrangement of elements was discovered by:

• John Dalton
• Rutherford
• Mendeleev ✓
• J.J.Thomson

26. ________ use to kill the pathogenic organism to obtain pure water.

• Chlorine ✓
• Hydrogen
• Oxygen
• Bromine

27. The symbols of ___ elements in English derived from Latin, Greek and german

• 20
• 30 ✓
• 40
• 50

Fill In The blanks:-
1. Word science comes from latin word “Scientia” which means “ knowledge".
2. Chemistry purely deals with the matter which have mass and occupy space.
3. Robert Boyle (1627-1691 A.D) an English scientist put forward idea of chemistry as systematic investigation of nature.
4. J. Black (1728 1799 A.D), a Scottish scientist made study of carbon dioxide.
5. J.Priesly Discovered oxygen, sulphur dioxide and hydrogen chloride.
6. Avogadro Proposed Avogadro’s law that equal volumes of gases under constant temperature and pressure contain equal number of molecules.
7. French scientist Petit determined the classical expression for the molar specific [heat capacity] of certain chemical elements.
8. J.J.Berzellius Introduced symbols, formula and chemical equation to make study more systematic.
9. A piece of matter in pure form is termed as a substance.
10. Every substance has a fixed composition and specific properties.
11. Every substance has physical and chemical properties.
12. An Element is a substance made up of same type of atoms having same atomic number.
13. Element cannot be decomposes into Simple substances by ordinary chemical reaction.
14. Elements occur in nature in free or combined form in solid, Liquid and gases states.
15. Now 118 elements have been discovered.
16. Symbol formula is an abbreviation to represent the name of element.
17. A symbol is taken from the name of that element in English, Latin and Greek.
18. When two or more than two elements or compounds physically combined without any fixed ratio is known as Mixture.
19. In mixture, the component substances retain their chemical properties.
20. Mixtures can be separated again by physical methods, as Filtration, Evaporation, Distillation and crystallization.
21. The Atomic Number is number of protons present in the nucleus of atom of any Element. It represented by symbol Z .
22. All atoms of an element have same atomic number due to the presence of same number of proton.
23. The Atomic Mass is sum of number of protons and neutrons present in the nucleus of atom of any element. It represented by symbol A
24. Atomic mass is calculated by A = Z + n where n is number of neutrons.
25. The atomic mass of an element expressed in gram is called gram atomic mass.
26. The molecular mass of an element or a compound expressed in gram is called gram molecular mass.
27. The formula mass of an ionic compound expressed in grams is called gram formula mass.
28. The atomic mass, molecular mass and formula mass of a substance expressed in grams is known as mole.
29. Avogadro an Italian scientist, calculated the number of atoms, molecules or ions present in one mole.
30. The value of Avogadro's number is found to be 6.02 x 10²³. This value is represented by N_A.
31. Calcium sulphate (CaSO₄) is commonly known as Plaster of Paris.
32. Sucrose is commonly known as pure sugar.
33. Sodium chloride (NaCl) is commonly known as table salt.

Name Of Elements in English, Derived Names From (Latin, Greek and German) And Symbols

S.NO.	English Names	Derived Names	Symbols
1.	Hydrogen	Greek (root genes)	H
2.	Helium	Greek (Helios)	He
3.	Lithium	Greek (Lithos)	Li
4.	Beryllium	Greek (Beryllos)	Be
5.	Boron	Latin (Borium)  Arabic (Buroq)	B
6.	Carbon	Latin (Carbone)	C
7.	Nitrogen	Greek (Nitrumgenes)	N
8.	Oxygen	Greek (Oxygeinomes)	O
9.	Florine	Latin (Flour)	F
10.	Neon	Greek (Neos)	Ne
11.	Sodium	Latin (Natrium)	Na
12.	Magnesium	Greek (Magnesium)	Mg
13.	Aluminium	Latin (Alumen)	Al
14.	Silicon	Latin (Silen)	Si
15.	Phosphorus	Greek (Phoros)	P
16.	Sulphur	Latin (Sulohur)	S
17.	Chlorine	Greek (Chloros)	Cl
18.	Argon	Greek (Argon)	Ar
19.	Potassium	Latin (Potash)	K
20.	Calcium	Greek (Calix)	Ca
21.	Scandium	Latin (Scandia)	Sc
22.	Titanium	Greek (Titan)	Ti
23.	Vanadium	Greek (Vanadis)	V
24.	Chromium	Greek (Chroma)	Cr
25.	Manganese	Greek (Magnesia)	Mn
26.	Iron	Latin (Ferrum)	Fe
27.	Cobalt	German (Kobold)	Co
28.	Nickle	German (Kupanickel)	Ni
29.	Copper	Latin (Cuprum)	Cu
30.	Zinc	German (Zink)	Zn

Name Of Elements with their Symbols, Atomic Numbers and valency

S.NO.	Elements with symbols	Atomic Numbers	Valency
1.	Hydrogen (H)	1	-1 +1
2.	Helium (He)	2	0
3.	Lithium (Li)	3	+1
4.	Beryllium (Be)	4	+2
5.	Boron (B)	5	+3
6.	Carbon (C)	6	+4 +2
7.	Nitrogen (N)	7	+3
8.	Oxygen (O)	8	-2
9.	Florine (F)	9	-1
10.	Neon (Ne)	10	0
11.	Sodium (Na)	11	+1
12.	Magnesium (Mg)	12	+2
13.	Aluminium (Al)	13	+3
14.	Silicon (Si)	14	+4
15.	Phosphorus (P)	15	+3
16.	Sulphur (S)	16	+2
17.	Chlorine (Cl)	17	+1
18.	Argon (Ar)	18	0
19.	Potassium (K)	19	+1
20.	Calcium (Ca)	20	+2
21.	Scandium (Sc)	21	+3
22.	Titanium (Ti)	22	+2 +3
23.	Vanadium (V)	23	+2 +3 +4
24.	Chromium (Cr)	24	+3
25.	Manganese (Mn)	25	+2 +3 +6
26.	Iron (Fe)	26	+2 +3
27.	Cobalt (Co)	27	+2 +3 +4
28.	Nickle (Ni)	28	+1 +2
29.	Copper (Cu)	29	+1 +2 +3
30.	Zinc (Zn)	30	+2
31.	Lead (Pb)	82	+2 +4

Compounds with their Formulas

S.No.	Compound	Molecular Formula / Chemical Formula
-	Acetic Acid	CH3COOH
.	Ammonia	NH3
-	Benzene	C6H6
.	Calcium carbonate (lime stone)	CaCO3
.	Calcium oxide	CaO
.	Carbon dioxide	CO2
.	Ethyl alcohol	C2H5OH
.	Glucose	C6H12O6
.	Hydrochloric acid /  Hydrogen chloride	HCl
.	Hydrogen peroxide	H2O2
.	Nitric acid	HNO3
.	Silicon dioxide (sand)	SiO2
.	Sodium carbonate (washing soda)	Na2CO3.10H2O
.	Sodium chloride (common salt)	NaCl
.	Sodium hydroxide (caustic soda)	NaOH
.	Sugar	C12H22O11
.	Sulphuric acid	H2SO4
.	Sulphur dioxide	SO2
.	Water	H2O