Physical and chemical properties of matter NCERT class 11
1. What are the two categories of properties of matter?
a) Physical and Chemical properties
b) Chemical and Biological properties
c) Physical and Electrical properties
d) Chemical and Mechanical properties
Answer: a)
Physical and Chemical properties
2. Which of the following is an example of a physical
property?
a) Reactivity with acids
b) Combustibility
c) Melting point
d) Acidity
Answer: c)
Melting point
3. How can physical properties be measured or
observed?
a) By changing the composition of the substance
b) Without changing the identity or composition of the substance
c) By heating the substance
d) By reacting the substance with another compound
Answer: b)
Without changing the identity or composition of the substance
4. What is required to measure chemical properties?
a) No change in the substance
b) Observation without interaction
c) A chemical change to occur
d) Only qualitative observation
Answer: c) A
chemical change to occur
5. What is an example of a chemical property mentioned
in the text?
a) Colour
b) Density
c) Combustibility
d) Melting point
Answer: c)
Combustibility
6. What do chemists use to predict the behaviour of
substances?
a) Intuition and guesswork
b) Physical and chemical properties
c) Appearance and texture
d) Only the structure of the molecule
Answer: b) Physical
and chemical properties
7. What type of measurement is required for scientific
investigation of physical properties?
a) Qualitative measurement
b) Quantitative measurement
c) Subjective measurement
d) Arbitrary measurement
Answer: b)
Quantitative measurement
8. Which of the following is a quantitative property
of matter?
a) Colour
b) Texture
c) Length
d) Shape
Answer: c)
Length
9. What must follow a number when making a
quantitative measurement?
a) A description of the substance
b) The unit in which it is measured
c) A chemical reaction
d) A specific formula
Answer: b)
The unit in which it is measured
10. Which system of measurement originated in France
in the late eighteenth century?
a) Imperial System
b) Metric System
c) English System
d) Standard System
Answer: b)
Metric System
11. Why was the metric system considered more
convenient than the English system?
a) It was based on the alphabetical system
b) It was based on the decimal system
c) It was more flexible
d) It had more units
Answer: b)
It was based on the decimal system
12. In which year was the need for a common standard
measurement system established by the scientific community?
a) 1850
b) 1900
c) 1960
d) 1980
Answer: c)
1960
13. Which of the following is a chemical property?
a) Boiling point
b) Odour
c) Combustibility
d) Colour
Answer: c)
Combustibility
14. What is the main purpose of measuring physical and
chemical properties in scientific experiments?
a) To produce new materials
b) To describe, interpret, and predict the behaviour of substances
c) To test the toxicity of substances
d) To create new measurement units
Answer: b)
To describe, interpret, and predict the behaviour of substances
15. Which of the following is a characteristic of
chemical properties?
a) Can be measured without changing the substance
b) Require a chemical change for measurement
c) Are determined by careful observation only
d) Are unrelated to substance composition
Answer: b) Require a chemical change for measurement
16. Which of the following is not an illustration of a
chemical property?
a) Combustibility
b) Reactivity with acids
c) Colour
d) Acidity
Answer: c)
Colour
17. What equipment is required to measure the chemical
properties of a substance?
a) A chemical change
b) No change in the substance
c) Simple observation
d) Just the structure of the substance
Answer: a) A
chemical change
18. Which is an example of a chemical property?
a) Density
b) Boiling point
c) Reactivity with acids
d) Colour
Answer: c)
Reactivity with acids
19. What is the primary difference between physical
and chemical properties?
a) Physical properties involve chemical reactions
b) Physical properties do not require a chemical change for measurement
c) Chemical properties are easy to measure
d) Chemical properties do not change the identity of the substance
Answer: b)
Physical properties do not require a chemical change for measurement
20. How are physical properties typically represented
in scientific measurements?
a) As a colour spectrum
b) With a unit and number
c) Through chemical reactions
d) Using chemical symbols
Answer: b)
With a unit and number
21. What is an example of a quantitative property of
matter?
a) Colour
b) Reactivity
c) Volume
d) Texture
Answer: c)
Volume
22. What system of measurement originated in France in
the late eighteenth century?
a) English System
b) Imperial System
c) Metric System
d) Standard System
Answer: c)
Metric System
23. What makes the metric system more convenient than
the English system?
a) It uses the imperial units
b) It is based on the decimal system
c) It has more units
d) It is easier to understand
Answer: b)
It is based on the decimal system
24. When was the need for a common standard
measurement system established?
a) 1900
b) 1960
c) 1800
d) 2000
Answer: b)
1960
25. What do chemists use to describe and predict the
behaviour of substances?
a) Observation of colour and texture
b) Knowledge of physical and chemical properties
c) Heat resistance
d) The molecular structure only
Answer: b)
Knowledge of physical and chemical properties
Physical and Chemical Properties
Every substance has unique physical and chemical
properties that can be categorized. Physical properties include characteristics
such as colour, odour, melting point, and density, which can be observed
without altering the substance’s composition. Chemical properties, like
combustibility and reactivity with acids, require a chemical change to be
measured.
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