PAPER FULL BOOK CHEMISTRY ENGLISH MEDIUM 9TH
Time allowed:15 minutes chemistry 9th Marks: 12
Name--------------------- Roll No----------------------
Sr.No. | |||||
i. | ns2, np5 is the general configuration of------ | Carbon family | Halogen family | Boron family | Alkali metals |
ii. | Which one of the following will have a maximum ionization energy | Li | Na | K | Rb |
iii. | When a covalent bond is formed, the energy of molecule--------- | Increase | Remains constant | Decrease | None |
iv. | When a liquid boils, its vapor pressure will be equal to | 1atm | 101325Pa | 760mmHg | All |
v. | Value of h planks constant is | 6.63x10-34js-1 | 6.63x10-34j-1s-1 | 6.63x10-34js | 6.63x10-34js-2 |
vi. | Which of the following solution will contain less water | 2M | 1M | 0.5M | 0.25M |
vii. | “CH4 is less reactive” it will be studied under --------------- | Inorganic chemistry | Physical chemistry | Biochemistry | Organic chemistry |
viii. | Most reactive metal is | Sodium | Zinc | Copper | Gold |
ix. | The mass of one molecule of water is | 18amu | 18g | 28amu | 28g |
x. | The oxidation number of Cl in KClO3 is | +4 | +5 | +6 | +7 |
xi. | Mist is an example of | Solid in solid | Liquid in gas | Gas in gas | Gas in liquid |
xii. | ---------- is non-electrolyte | H2SO4 | HCl | NaCl | Sugar solution |
LATEST PAPER FULL BOOK CHEMISTRY CLASS 9TH
The time allowed: 1:45 Marks:48
Q:2 PAPER: Answer any five questions
i.)Define analytical chemistry.
(ii) write two differences between the molecule and molecular ion
(iii) How are positive rays generated?
(iv) write two observations of Rutherford experiment
(v) what is quantum.
(vi) the atomic number is a more fundamental property than atomic mass. Why?
(vii) How many blocks are there in the periodic table.
(viii) How many elements are there in the first period. Write their names.
Q:3 (PAPER) Answer any five questions:
Why are gases compressible
(ii) what is Charles's law? Write its mathematical form.
(iii) what is epoxy? Write its uses.
(iv) why has water polar covalent bond
(v) why the ionic compounds have high melting and boiling points?
(vi)convert -30C into kelvin.
(vii) define double covalent bond.
(viii) why is evaporation cause cooling?
Q:4 GIVE Answer any five questions:
What is the difference between a solution and an aqueous solution
(ii) what is the Tyndall effect.?
(iii) define oxidizing agent and give an example
(iv)what is corrosion? Give example.
(v) HOW is aluminum protected from further corrosion?
(vi) what is the trend of electropositivity in the period?
(vii) How is platinum used in automobiles?
(viii) why is nitrogen necessary for the safety of life.
Answer any two questions:
- Write four differences of mixture and compound (ii) write four properties of canal rays
- Explain coordinate covalent bond with an example (b) what is the boiling point. Write its factor
- Explain down’s cell with labeled diagram (b) write 4 characteristics of the suspension