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Problem Solving Assessment(PSA)

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Question-1
The building blocks of all matter are

(A) Atoms	(B) Molecules
(C) Elements	(D) Compounds

Question-2
The scientist who first use the symbols for elements in a very specific sense.

(A) John Dalton	(B) Rutherford
(C) Charles	(D) Boyle

Question-3
Smallest particle of an element or a compound that is capable of an independent existence and shows all the properties of that substance is

(A) A molecule	(B) An atom
(C) Complex	(D) Mixture

Question-4
The symbol of sodium is

(A) S	(B) So
(C) Fe	(D) Na

Question-5
The formula of carbon tetrachloride is

(A) CCl₂	(B) CCl
(C) CCl₃	(D) CCl₄

Question-6
A symbolic representation of composition of a compound is

(A) Chemical formula	(B) Empirical formula
(C) Abstracted formula	(D) Mathematical formula

Question-7
The symbol of Potassium is

(A) P	(B) Ka
(C) Pa	(D) K

Question-8
In water, the ratio of mass of hydrogen to the mass of oxygen is always

(A) 1:8	(B) 1:16
(C) 8:1	(D) 16:1

Question-9 A sample of pure water, irrespective of source, contains 88.89% oxygen and 11.11% hydrogen by mass. The data supports the

(A) Law of conservation of mass	(B)Law of constant composition
(C)Law of multiple proportions	(D)None of these

Question-10 Which of the following is not a monoatomic substance?

(A) Argon	(B)Neon
(C)Helium	(D)Nitrogen

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Std 9

CBSE

Practice in Related Chapters
Matter In Our Surroundings
Is Matter Around Us Pure
Atoms And Molecules
Structure Of The Atom

CONTENTS

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Practice in Related Chapters