Assertion and Reason Questions for Class 10 Science
Important Assertion and Reason Questions for Class 10 Science CBSE Term 1 Exam. CBSE Assertion Reason Class 10 Science.
Assertion Reason Questions for Chemical Reactions and Equations Chapter
Following questions consists of two statements – Assertion (A) and Reason (R). Answer these
questions selecting the appropriate option given below:
A.) Both assertionand reason are true, and reason is the correct explanation of assertion.
B.) Both assertion and reason are true, but reason is not the correct explanation of assertion.
C.) Assertion is true but reason is false.
D.) Assertion is false and reason is true.
(1) Assertion(A): The number of atoms of each element remains the same, before and after a chemical reaction.
Reason(R): Any chemical equation can be unbalanced because the mass may not be same on both sides of the equation.
Answer: C
(2) Assertion(A): Brown fumes are obtained from the thermal decomposition of Lead Nitrate.
Reason(R): Nitrogen dioxide gas is released which is brown in colour.
Ans. A
(3) Assertion(A): Silver Bromide is used in black and white photography.
Reason(R): Silver Bromide decomposes in the presence of sunlight
Answer: B
(4) Assertion(A): Sulphur dioxide and Sulphur trioxides are released during the decomposition of iron sulphate.
Reason(R): This is an example of thermal decomposition.
Answer: B
- English MCQs with Answers for Class 10
- Science MCQs with Answers for Class 10
- Social Science Mock Test for Class 10 (History, Geo, Political Science & Economics)
Assertion Reason Questions for Acids, Bases and Salts
Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
A.) Both assertion and reason are true, and reason is the correct explanation of assertion.
B.) Both assertion and reason are true, but reason is not the correct explanation of assertion.
C.) Assertion is true but reason is false.
D.) Assertion is false and reason is true.
(1) Assertion (A): The organic compounds such as C6H12O6 and C2H5OH contain hydrogen but they do not conduct electricity in the water.
Reason(R): Acids produce H3O+ ions in the solutions.
Answer: B
(2) Assertion(A): NH4Cl is an acidic salt.
Reason(R): NH4Cl is the salt of hydrochloric acid and ammonium hydroxide.
Answer: A
(3) Assertion(R): The compound prepared from gypsum on heating it at 373 K , is known as Plaster of Paris.
Reason(R): Plaster of Paris is used in hospitals mainly as plaster for supporting fractured bones in the right position. In dentistry, it is used for making casts
Answer: B
Assertion Reason Questions for Metals & Non Metals
Following questions consists of two statements – Assertion (A) and Reason (R). Answer these
questions selecting the appropriate option given below:
A.) Both assertion and reason are true, and reason is the correct explanation of assertion.
B.) Both assertion and reason are true, but reason is not the correct explanation of assertion.
C.) Assertion is true but reason is false.
D.) Assertion is false and reason is true
(1) Assertion(A): Magnesium chloride is an ionic compound.
Reason (R): Metals and non-metals react by mutual transfer of electrons.
Answer: A
(2) Assertion: C and N do not react with dil. HCl and dil. H2SO4.
Reason: Metals do not react with dil. HCl and dil. H2SO4.
Answer: C
(3) Assertion: Gold occurs in native state.
Reason: Gold is a reactive metal.
Answer: C
Assertion Reason Questions for Life Processes
Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
A.) Both assertion and reason are true, and reason is the correct explanation of assertion.
B.) Both assertion and reason are true, but reason is not the correct explanation of assertion.
C.) Assertion is true but reason is false.
D.) Assertion is false and reason is true.
(1) Assertion: veins have valves.
Reason : the pressure for the flow is far lesser compared to arteries
Answer: A
(2) Assertion : the left atrium and left ventricle are completely separated from the right atrium and the right ventricle.
Reason : oxygenated and deoxygenated blood never mix with each other inside the heart
Answer: A
(3) Assertion : Anaerobic respiration requires more energy as compared to aerobic respiration.
Reason : Mitochondria is the power house of the cell
Answer: D
Assertion Reason Questions for Light Reflection and Refraction
Following questions consists of two statements – Assertion (A) and Reason (R). Answer these
questions selecting the appropriate option given below:
A.) Both assertion and reason are true, and reason is the correct explanation of assertion.
B.) Both assertion and reason are true, but reason is not the correct explanation of assertion.
C.) Assertion is true but reason is false.
D.) Assertion is false and reason is true.
Maths MCQ for Class 10 2021 – 22
Class 10 Hindi MCQ with Answers (2021 – 22)
(1) Assertion(A): The mirrors used in search lights are concave spherical.
Reason (R) : In concave spherical mirror the image formed is always virtual.
Answer: C
(2) Assertion (A): Convex mirror is preferred for rear view mirrors in vehicles.
Reason (R) :The field view of a convex mirror is lesser than that of concave mirror
Answer: C
(3) Assertion(A): Light travels faster in water than air
Reason (R): Water is denser than Air.
Answer: D
Assertion Reason Questions for Human Eye and Colorful World
Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
A.) Both assertion and reason are true, and reason is the correct explanation of assertion.
B.) Both assertion and reason are true, but reason is not the correct explanation of assertion.
C.) Assertion is true but reason is false.
D.) Assertion is false and reason is true.
(1) Assertion(A): Rainbow is formed in the sky due to the dispersion of sunlight by water droplets.
Reason(R): Light of shorter wavelength is scattered much more than the light of longer wavelength.
Answer: B
(2) Assertion: The sky appears dark in outer space..
Reason : Scattering does not occur in outer space as there is no atmosphere
Answer: A
(3) Assertion(A): Sun looks reddish at sunrise and sunset.
Reason (R) : Sun rays have to pass through smaller distance in atmosphere.
Answer: C