ASSERTION - REASON TYPE QUESTIONS
Two statements are given ? One labelled Assertion (A) and other
labelled Reason (R). Select the correct answer to these questions from
the codes (a), (b), (c) and (d) as given below.
a) Both A and R are true, R is the correct explanation of the assertion.
b) Both A and R are true, but R is not the correct explanation of the
assertion.
c) A is true, but R is false.
d) A is false, but R is true.
1. Assertion (A): To every action, there is an equal and opposite reaction.
Reason (R) : The action and reaction always act on two different bodies.
2. Assertion (A): Greater is the mass of a body, greater is its inertia.
Reason (R) : Mass of a body is a measure of inertia.
3. Assertion (A): A body can be at rest even when it is under the action of any
number of external forces.
Reason (R) : Sum of all the external forces is zero.
4. Assertion (A): The application of an unbalanced force cannot bring a change
in the velocity if the object.
Reason (R) : A force also produces a change of momentum.
5. Assertion (A): A rocket moves forward by pushing the surrounding air
backwards.
Reason (R) : It derives the necessary force to move forward according to
Newton?s third law of motion.
6. Assertion (A): A body can have acceleration even if its velocity is zero at a
given instant of time.
Reason (R) : A body is momentarily at rest when it reverses its direction.
7. Assertion (A): A particle moving along a path with a non-zero velocity can
have zero speed.
Reason (R) : The magnitude of speed is greater than or equal to the
magnitude of velocity.
8. Assertion (A): Linear momentum of a body changes even when it is moving
uniformly in a circle.
Reason (R) : Force required to move a body uniformly along a straight line
is zero.
9. Assertion (A): A body can be at rest even when it is under the action of any
number of external forces.
Reason (R) : Because the sum of all the external forces is zero.
10. Assertion (A):A gun recoils after firing from a bullet.
Reason (R) : Action and reaction are equal and opposite and act on
different bodies.
11. Assertion (A) : When a beam of light is passed through a colloidal solution
the path of the beam of light becomes visible.
Reason (R) : Light gets scattered by the colloidal particles.
12. Assertion (A) : A solution of copper sulphate in water is homogeneous
mixture.
Reason (R) : A solution having non-uniform composition throughout is
known as homogeneous mixture.
13. Assertion (A): True solution exhibits Tyndall effect.
Reason (R) : Particles are very small in size.
14. Assertion (A): Sodium chloride cannot be broken down into its chemical
constituents by physical process.
Reason (R) : Sodium chloride is an example of a pure substance.
15. Assertion (A): Alloy is considered as a mixture.
Reason (R) : It cannot be separated into their constituents by physical
methods.
16. Assertion (A): Germanium, Arsenic and Antimony are classified as
metalloids.
Reason (R) : Germanium, Arsenic and Antimony possess intermediate
properties of metals and non-metals.
17. Assertion (A): Hydrogen, oxygen, water, ammonia are pure substances
Reason (R) : Pure substances are made up of more than one kind of
particles.
18. Assertion (A): Interconversion of states of matter is a physical change.
Reason (R) : There is a change only in physical properties during a physical
change and no new substances are formed.
19. Assertion (A): Compounds can be broken down in to simpler substances by
chemical or electro chemical reactions.
Reason (R) : Compounds are composed of two or more elements
chemically combined in a definite ratio.
20. Assertion (A): Mixing iron filings and sulphur at room temperature forms a
compound.
Reason (R) : The properties of the components do not change after mixing
iron filings and sulphur at room temperature.
21. Assertion (A): The cells of the onion peel all look the same, irrespective of
the size of the onion.
Reason (R) : All the cells of a multicellular organism look the same.
22. Assertion (A): Every multicellular organism has come from a single cell.
Reason (R) : Cells divide to produce cells of their own kind.
23. Assertion (A): If we put dried raisins in plain water for some time each
raisin gain water and swells.
Reason (R) : Raisins swell due to exosmosis.
24. Assertion (A): Bacteria do not show characteristics of life.
Reason (R) : Viruses lack any membrane.
25. Assertion (A):Nucleus directs the life processes of the cell.
Reason (R) : The lysosomes in eukaryotes are separated from the
cytoplasm by single layered membrane .
26. Assertion (A): There is no demarcation of dividing and non-dividing regions
in animals.
Reason (R) : Cell growth in animals is more uniform in comparison to that
of plants.
27. Assertion (A): Complex permanent tissue is called collenchyma.
Reason (R) : In some situations, simple permanent tissue contains
chlorophyll and performs photosynthesis and is called chlorenchyma.
28. Assertion (A): Xylem consists of tracheids, vessels which are tubular
structures.
Reason (R) : The four constituents of phloem are Sieve tube, Companion
cell, Phloem parenchyma and Phloem fibres.
29. Assertion (A): Apical meristem is present at the tip of stem and root.
Reason (R) : Lateral meristem increases the length of the stem and root.
30. Assertion (A): The epidermis is usually made of a single layer of cells.
Reason (R) : We can observe small pores here and there in the epidermis
of stem.