Chemistry Paper

Sample Paper

Sub : Chemistry

Class IX

Full Marks:80 Time:2 hours

Section A is compulsory. Attempt any four questions from Section B.

Section A(40 marks)

Question1

a) From the list given below, select the word(s) required to correctly complete the blanks (i) to (v) in the following passage- [5]

Note: Words chosen from the list are to be used only once. Write only the answers. Do not copy the passage.

[silver nitrate, sodium nitrate, Dalton, sealed, separate, Landolt, sodium chloride, mix]

The Law of Conservation of Mass was studied by (i)……… in case of a double decomposition reaction between (ii)……… and (iii)……… in a special tube. This tube was U-shaped and the limbs were (iv)……… so that the reactants could

(v)……… well.

b) Select from the list given (A to E) one substance in each case which matches the description given in parts (i) to (v)- [5]

Note: Each substance is used only once in the answer.

(A) Sulphur dioxide (B) Magnesium sulphate

(C) Carbon tetrachloride (D) Potassium chlorate

(E) Aluminium oxide

i) A compound which can dissolve Sulphur.

ii) A compound used to make adsorbent medium.

iii) A compound insoluble in water.

iv) A compound less soluble in water than potassium nitrate.

v) A compound whose hydrated form is Epsom salt.

c) For parts (c)(i)-(c)(x), select the correct answer from the choices A,B,C and D which are given- [10]

Write only the letter corresponding to the correct answer.

i) The valency of Platinum in PtZnO2:

(A) 1 (B) 2 (C) 3 (D) 4

ii) A chemical which decomposes with the absorption of sound energy:

(A) Nitrogen monoxide (B) Acetylene

(C) Ethyl alcohol (D) Potassium bromide

iii) An element which burns with a lilac flame on reaction with cold water:

(A) Potassium (B) Sodium (C) Calcium (D) Magnesium

iv) The scientist who discovered cathode rays:

(A) Rutherford (B) Goldstein (C) Thomson (D) Crookes

v) The chemist who classified elements into triads-

(A) Moseley (B)...