FINAL TERM EXAMINATION YEAR (Model Paper) …….
CLASS: 9th PAPER: Chemistry DATE:__________
Student’s Name: _______________________________ Computer#
Duty Tr:
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Checked by:
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Q:1 | Q:2 | Q:3 | Q:4 | Q:5 | Q:6 | Q:7 | Q:8 | Q:9 | PR | Total |
12 | 10 | 10 | 10 | 18 | 60 | |||||
Time Allowed: 15 min
Q: 1 Choose the correct option. (12)
Note: You have four choices for each objective type question as A/B/C/ and D. The choice which you think is correct; fill that circle in front of that question number. Cutting or filling two or more circles will result in zero mark in that question.
- The molar mass of H2SO4is:
- a) 9.8g b) 98g c) 9.8 amu d) 80g
- The most abundant element occurring in the ocean is:
- a) Oxygen b) Hydrogen c) Nitrogen d) Silicon
- The P subshell has:
- a) One orbital b) Two orbitals c) Three orbitals d) Four orbitals
- The amount of energy released when an electron is added to an atom is called:
- a) Lattice energy b) Ionization energy c) Electronegativity d) Electron affinity
- Along the period which one of the following decreases:
- a) Atomic radius b) Ionization Energy c) Electron affinity d) Electronegativity
- Identify the compound which is not soluble in water.
- a) C6H6 b) NaCl c) KBr d) MgCl2
- Which one of the following diffuses fast?
- a) Hydrogen b) Helium c) Fluorine d) Chlorine
- Solid particles possess which one of the following movement?
- a) Rotational motion b) Vibrational motion c) Translational motion d) both b and c
- If 10 cm3of alcohol is dissolved in 100 g of water, it is called:
- a) % w/w b) % w/v c) % v/w d) % v/v
- The oxidation number of chromium in K2Cr2O7is:
- a) +2 b) +6 c) +7 d) +14
- The most common example of corrosion is:
- a) Chemical decay b) Rusting of iron c) Rusting of aluminium d) Rusting of tin
- Sodium is extremely reactive metal, but it does not react with:
- a) Hydrogen b) Nitrogen c) Sulphur d) Phosphorous
Essay type Marks:48 Time: 1:45 Hours
Section – I 2 X 15=30
- Write short answers of any five parts from the following. 2×5=10
- State three reasons why do you think air is a mixture and water a compound?
- Define atomic mass unit. Why is it needed?
iii. An element has an atomic number 17. How many electrons are present in K, L and M shells of the atom?
- Give four characteristics of cathode rays.
- What are the defects of Rutherford’s atomic model?
- Why the second ionization energy of magnesium is higher than the first one?
vii. Why silver and gold are least reactive?
- Write short answers of any five parts from the following. 2×5=10
- Give the trend of ionization energy in a period.
- What do you mean by groups and periods in the Periodic Table?
iii. Why shielding effect of electrons makes cation formation easy?
- Define electron affinity and ionization energy?
- Differentiate between lone pair and bond pair of electrons.
- Give the characteristic properties of ionic compounds.
vii. Where do the electrons flow from Zn electrode in Daniel’s cell?
- Write short answers of any five parts from the following. 2×5=10
- Name the by-products produced in Nelson’s cell?
- Define standard atmospheric pressure. What are its units? How it is related to Pascal?
iii. What happens at the cathode in a galvanic cell?
- What do you mean by evaporation how it is affected by surface area.
- Differentiate between strong and weak electrolytes.
- What do you mean by volume/volume %?
vii. Why we stir paints thoroughly before using?
Section-II 9×2=18
Note: Answer any two questions from the following.
- (i) Define element and classify the elements with examples.
(ii) How Rutherford discovered that atom has a nucleus located at the centre of the atom?
- (i) Explain the types of covalent bonds with at least one example of each type.
(ii) Compare the physical properties of metals and non-metals.
- (i) Define and explain Charles’ law of gases.
(ii) 12 M H2SO4 solution is available in the laboratory. We need only 500cm3 of 0.1 M solution , how it will be prepared?