Student Name: __________________ Total
Marks: 75
Subject: Chemistry Obtained
Marks: ____ Class:
Nine
Q:1 Choose the correct answer.
1) The most Abundant element occurring
in the Oceans is? (a) Oxygen (b) Hydrogen (C) Nitrogen (d)
Silicon
2) Which one of the following
molecules is not tri-atomic (a)
H₂ (b)O3 (c) Н₂0 (d) CO₂
3) The mass of One molecule
of water is: (a)18
amu (b) 18g (C) 18mg (d) 18kg
4) The molar mass of H₂SO is:
(a)
98g (b) 98amu (c) 9.8g (d) 9.8 amu
5) Industrial Chemistry deals
with the compounds (a) In the laboratory (b) on micro scale (C) on
Commercial Scale
6) The concept of orbit was
used by: (a)
J.J. Thomson (by Rutherford (c) Bohr (d) Planck
7) When U.235 breaks it
produces: (a)
Electrons (b) Neutrons (c) Protons (d) nothing
8) The P Subshell has: (a) One
Orbital (b) Two Orbitals (c) Three Orbitals (d) Four Orbitals
9) Deuterium is used to make:
(a) Hight
Water (b) Heavy water (6) Soft Water (d) Hard water
10) To who discovered the
Proton: (a)
Goldstein (b) J. J Thomson (c) Neil Bohr(d) Rutherford
Q3: answer of the following question.
1) Define Industrial Chemistry? 2) Define matter with example.? 3) Define Chemical properties with
example? 4) De fine mixture with example? 5) Define Atomic number? 6) Define Mass number and its formula? (7) De fine Empirical formula with
example? (8) What is Ion? How many types? (9) Difference between organic
and inorganic Chemistry? (10) How does homogenous mixture differ from
heterogeneous mixture? (11) What are the defects of Rutherford's atomic model?
(12) Give three properties of positive rays? (13) For what
purpose U-235 is used? (14) Define shell and subshell.
Q4:
Long Question.
I. List Five characteristics by which by Compounds can be distinguished. From mixtures.
II. Explain Rutherford Atomic model in detail?
--Best of luck--
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