Question

(A)
Sodium carbonate
() Ammonium Sulfate
(i) Discovery of electron
(IV) Discovery of neutron
(v) Law of gravitation
(B)
(a) (NH 4)2SO4
(b) Chadwick
(c) Newton
(d) Na2CO3
(e) J.J. Thomson​

Answer 1

• 2 Chemistry
• 1. Anything that occupies space and has mass
• is called :
• a) Element b) Matter
• c) Compound d) Mixture
• 2. Simplest form of pure substance which can't
• be broken nor built from simpler substances
• is :
• a) mixture b) Compound
• c) Element d) None of these
• 3. State of matter that has neither a fixed shape
• nor a fixed volume is called
• a) Solid b) Liquid
• c) Gas d) Mixture
• 4. Common salt is an example of
• a) mixture b) Compound
• c) Element d) All of these
• 5. The main characteristic that distinguishes
• solids from liquids & gases is:
• a) Rigidity b) Evaporation
• c) Volatility d) Melting point
• 6. Which of following is not a homogeneous
• mixture
• a) Air b) Brass
• c) Soloution of sugar in water
• d) Smoke
• 7. The attractive force operating among
• molecule is known as:
• a) Inter atomic force
• b) inter molecular force
• c) Gravitational force
• d) None of them
• 8. As temperature rises the kinetic energy of
• molecules
• a) Decrease b) Increases
• c) Remain same
• d) deaccelerate
• CHAPTER - 1
• NATURE OF MATTER
• 9. The molecule in solid possess ______ kinetic
• energy as compared to liquid & gases
• a) Equal b) More
• c) Less d) Equal & less
• 10. Out of which one have maximum movement
• of particals.
• a) Solids b) Liquids
• c) Gases d) All oft these
• 11. Name of physical state of matter which can be
• easily compressed
• a) Solid b) Liquid
• c) Gas d) Alloy
• 12. The basic form of matter that cannot be
• broken into simple substances by chemical
• reaction is called
• a) Element b) Compound
• c) Mixture d) None of the above
• 13. Elements which are Liquid at room
• temperature are
• a) Sodium & Potassium
• b) Nitrogen and fluorine
• c) Iodine
• d) Mercury and Bromine
• 14. ___________ is the lightest element
• a) Hydrogen b) Helium
• c) Lithium d) Sodium
• 15. Symbol of mercury is
• a) M b) My
• c) Hg d) Hm
• 16. Zn is the symbol of
• a) Tungsten b) Uranium
• c) Vanadium d) Zinc
• 17. Symbol of Cadmium
• a) C b) Ca
• c) Cd d) Cm

Answer 2

Explanation:

Sodium carbonate ---Na2CO3

Ammonium Sulfate ---(NH 4)2SO4

Discovery of electron ---J.J. Thomson

Discovery of neutron ---Chadwick

Law of gravitation --- Newton