ANANTHA VIDYANIKETANA
Grade: IX I TERM EXAMINATION Marks: 50
Date: / /2025 Subject: Chemistry Time: 2 Hrs
Section A (20 marks)
(Attempt all questions from this section)
Question 1
Choose the correct answers to the questions from the given options.
[5]
(Do not copy the question. Write the correct answer only)
(i) Which of the following metal forms an amphoteric oxide?
(a) Potassium (b) Zinc (c) Calcium (d) Copper
(ii) MnO2 + x HCl ----- MnCl2 + y H2O + zCl2 in order to balance the above chemical
equation, the value of x, y and z respectively are:
(a) 6, 2, 2 (b) 4, 1, 2 (c) 4, 2, 1 (d) 2, 2, 1
(iii) Assertion (A): The sulphate radical (SO₄²⁻) can form salts with both monovalent
and divalent metals.
Reason (R): The valency of radicals must match the valency of the metal ion to
form a neutral compound.
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation of A.
C. A is true, but R is false.
D. A is false, but R is true.
(iv) Elements X and Y have valencies 1 and 2 respectively. The formula unit masses of
their oxides are 62 u and 40 u respectively. Elements X and Y are:
(a) Mg and Na (b) Na and Al (c) Al and Mg (d) Na and Mg
(v) Two particles X and Y have the composition as shown in the table:
Particle Number Number Number
of of of
electron neutron protons
s s
X 10 8 8 The particles X and Y are
Y 18 18 17 (a) Metal atoms (b)
Nonmetal atoms (c) Negative ions (d)Positive ions
Question 2
(i) Match the following
[5]
Column A Column B
a. Acid radicals i) K+, Na+
b. Basic Radicals ii) Fe2+, Fe3+
c. Monovalent radicals iii) CO32-, SO42-
d. Variable valency iv) P4, S8
e. Tetravalent elements v) Cl-, K+
vi) Pb+4, Pt+4
(ii) Identify the terms
[5]
a) A horizontal rows in the periodic table.
b) The simplest formula, which gives the simplest ratio in whole numbers of atoms of
different elements.
c) An oxide which do not exhibit acidic or basic properties.
d) The family of elements found in group 18 of the periodic table.
e) Elements that lie along the zig-zag line in the periodic table and show properties of
both metals and non-metals.
iii) In the formation of the compound X2Y, an atom ‘X’ which is lies in the 3rd
period loses two electrons to ‘Y’ atom contains 8 protons. Answer the
following questions.
1) Name the compound formed.
[1]
2) Write the formula of ions involved in the above compound.
[1]
3) Mention the type of compound formed.
[1]
4) Draw atomic structure of an element Y with appropriate subatomic particles.
[2]
Section B (30 Marks)
(Answer any three questions from this section)
Question 3
i) Define the following terms:
[2]
a) Period
b) Valence electrons
ii) A solution of 18 grams of sodium hydroxide reacts with 49 grams of sulfuric acid. If
45 grams of sodium sulfate is formed. What is the mass of water formed?
[2]
iii) A student of class 8 performing an experiment based on identification of cations by
using alkali. He has a Blue crystalline solid X and adding an alkali Y it contains a cation
from period 3 and group 1 which gives a precipitate Z.
[3]
a) Identify X and Y
b) What is the colour of the precipitate Z
c) Write the chemical equation involved in the above reaction
iv) Balance the following chemical equations.
[3]
a) Fe2O3 + HCl ---- FeCl3 + H2O
b) Ca (HCO3)2 + HCl ---- CaCl2 + H2O + CO2
c) NH3 + O2 ----- H2O + NO
Question 4
i) An element Q has mass number 35.5 state the following.
[2]
a) Identify the group and period of an element Q
b) Write its electronic configuration
ii) Calculate the relative molecular mass of ammonium sulphate. [N=14, S= 32,
O=16] [2]
iii) Find out the empirical formula of the following compounds.
[3]
a) Glucose
b) Hydrogen peroxide
c) Acetic acid
iv) Convert following word equations into chemical equation.
[3]
a) Ammonia + Nitric acid ------- Ammonium nitrate
b) Sodium sulphite + Hydrochloric acid ---- Sodium chloride + water + sulfur dioxide
c) Ferrous sulphide + sulphuric acid ---- Ferrous sulphate + Hydrogen sulphide
Question 5
(i) Complete and balance the given reaction.
[2]
a) FeCl3 + 3 NaOH -----
b) CuSO4 + 2 NH4OH ----
ii) Electron distribution of two elements P and Q in their outermost shell is shown
below. [2]
a) Identify the atomic numbers of P and Q
b) State the valency of Q
iii) Calculate the percentage composition of calcium in calcium phosphate.
[3]
iv) Observe the following periodic table containing elements and answer the questions
that follow.
Group 1 2 13 14 15 16 17 18
number
2nd Li D O K Ne
period
3rd A Mg E Si H L B
period
4th R T I Q U M Y
period
a) Name the type of oxide is formed between A and O
[3]
b) Write the formula of the compound formed between T and L
c) What is the name given for the group of elements K, L, M
Question 6
i) State the common names given for the following group of elements.
[2]
a) Group 2
b) Group 17
(ii) Balance the given chemical equations.
[3]
(a) K2O + HNO3 -----KNO3 + H2O
(b) PbO2 ---- PbO +O2
iii) Find the empirical formulae of the compounds with the following percentage
compositions: [3]
Zn = 47.8 Cl = 52.2
iv) Complete and name the type of oxide formed in the below chemical equations.
[3]
a) Mg + O2 ----
b) Al + O2 ----
c) SO2 + O2 --
Question 7
i) Arrange the following elements with respect to the following properties given in
brackets. [2]
a) C, Na, Cl, H [Increasing order of shells]
b) P, K, F, B, O [Decreasing order of valence electrons]
ii) Fill in the blanks by choosing correct answer from the brackets.
[2]
a) The formula for mercurous chloride is ……….. [HgCl2 / Hg2Cl2]
b) Ca(OH)2 is a …………… [Acid / Base]
iii) Observe the following table containing elements. Identify the elements as metals,
nonmetals and metalloids and fill the blank spaces with appropriate answers.
[3]
Elements Symbol Nature
---------- Fe ---------
Germaniu ---------- ---------
m
----------- Al ---------
iv) Find the empirical formula of the compounds with the following percentage.
[3]
27.3% C, 72.7% O.
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