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CBSE Class 9  >  Class 9 Test  >  : Additional Practice  >  Test: Why do we fall ill- Assertion & Reason Type Questions - Class 9 MCQ

Why do we fall ill- Assertion & Reason Type Questions - Free with Solutions


MCQ Practice Test & Solutions: Test: Why do we fall ill- Assertion & Reason Type Questions (15 Questions)

You can prepare effectively for Class 9 Class 9: Additional Practice with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Why do we fall ill- Assertion & Reason Type Questions". These 15 questions have been designed by the experts with the latest curriculum of Class 9 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 30 minutes
  • - Number of Questions: 15

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Test: Why do we fall ill- Assertion & Reason Type Questions - Question 1
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Influenza spreads faster.

Reason: It is an air-borne disease.

Detailed Solution: Question 1

Influenza is an infectious air-borne disease and hence spreads easily.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 2
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Communicable diseases are also called infectious diseases.

Reason: Cancer is a communicable disease.

Detailed Solution: Question 2

Many infectious diseases are called ‘communicable diseases’ since they can spread from one person to another. Cancer is a noncommunicable disease.

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Test: Why do we fall ill- Assertion & Reason Type Questions - Question 3
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Chances of spreading cholera are higher in a village.

Reason: Community health is essential for good individual health.

Detailed Solution: Question 3

Cholera is water borne disease and in a village, water sanitation management is not fully available. Hence, flies which acts as vector are in abundance. This leads to chances of spreading cholera higher in a village. Hygiene, sanitation and public health is essential as it checks the spread of infectious diseases. e.g., due to lack of facilities and public health, slum area is more prone to epidemic.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 4
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: A person suffering from AIDS cannot fight even very minor infections.

Reason: Casual organism of AIDS is HIV.

Detailed Solution: Question 4

A person suffering from AIDS cannot fight even very minor infections because it damages the immune system of the person and damages its function. Causal organism of AIDS is Human Immunodeficiency Virus (HIV).

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 5
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Tuberculosis is an acute disease.

Reason: Disease that lasts for a short period is called acute disease.

Detailed Solution: Question 5

Tuberculosis is a chronic disease as it persists for a long time. Acute diseases, on the other hand, last for a short time and do not cause major health effects. E.g., common cold.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 6
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Polio is commonly called infantile paralysis.

Reason: It occurs only in infants and children.

Detailed Solution: Question 6

Polio was regarded as disease of infants and children. Hence, this disease was called infantile paralysis. But now it is known that it can occur at any age.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 7
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Antibiotics are effective against bacterial infection and not viral infection.

Reason: Viral diseases do not have their own body mechanism, but they use cells of the host.

Detailed Solution: Question 7

Viral diseases do not have their own body mechanism, but they use cells of the host. Hence, antibiotics are ineffective against viral infections.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 8
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Bland and nourishing food should be taken when we fall sick.

Reason: Such food contains fat, oil or spices. Hence, gets digested easily.

Detailed Solution: Question 8

We should take bland and nourishing food when we fall sick. It is because such food does not contain fat, oil or spices, hence, gets digested easily. Also, it provides sufficient energy and nutrients which are required for recovery and regeneration.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 9
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Bland and nourishing food should be taken when we fall sick.

Reason: Such food contains fat, oil or spices. Hence, gets digested easily.

Detailed Solution: Question 9

Disease affects only one part but syndrome affects multiple organs in our body. Hence, AIDS is a syndrome as it affects many parts like respiratory tract etc.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 10
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Direction: In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:

Assertion : In many species of mosquitoes, only the females feed on warm-blooded animals, including humans.

Reason : Female mosquitoes are vectors of many diseases.

Detailed Solution: Question 10

Mosquitoes are the most common vectors. In many species of mosquitoes, the females need highly nutritious food in the form of blood in order to be able to lay eggs. These female mosquitoes feed on many warm-blooded animals, including us. In this way, they can transfer diseases from one person to another.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 11
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Direction: In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:

Assertion : Its okay to sit near a person suffering from cold.

Reason : Cold is a non-communicable disease.

Detailed Solution: Question 11

It is not okay to sit near a person suffering from cold because cold is a communicable disease. The droplets containing the causative microbe of cold can spread through air when the person sneezes or coughs. If someone standing close by and breathes in these droplets, a person might get infected.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 12
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Direction: In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:

Assertion : HIV infected person is prone to opportunistic diseases.

Reason : Immune system weakens during HIV infection.

Detailed Solution: Question 12

A HIV infected person has a weakened immune system as the HIV virus goes to the immune system and damages its function. Such people can no longer fight off many minor infections caused by opportunistic organisms like virus, bacteria, fungi, etc. That we face everyday. Therefore, they are more prone to opportunistic diseases.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 13
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Direction: In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:

Assertion : Hepatitis is a viral infection of liver causing its inflammation.

Reason : Hepatitis is a contagious disease.

Detailed Solution: Question 13

Hepatitis is a viral infection of liver causing its inflammation. It is accompanied by loss of appetite, nausea, whitish stool, but orange brown urine and jaundice which occurs due to bilirubin released from damaged liver cell. Infectious hepatitis spreads from person to person by faecal or oral route. Contamination of water and food may cause epidemic. Serum hepatitis spreads by transfusion of contaminated blood.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 14
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Direction: In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:

Assertion : Dengue can be treated by taking antibiotics.

Reason : Antibiotics block the biochemical life processes of viruses.

Detailed Solution: Question 14

Antibiotics are only effective against bacterial infections, they are not effective against viral infections. Dengue is a viral disease, it cannot be prevented by taking antibiotics because viruses do not have biochemical life processes of their own. They are taxonomically different from bacteria and do not use the pathways of bacteria. Hence, antibiotics do not work against viral infections.

Test: Why do we fall ill- Assertion & Reason Type Questions - Question 15
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Direction: In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:

Assertion : Peptic ulcers cause acidity related pain and bleeding in the stomach.

Reason : Stress in the life causes peptic ulcers.

Detailed Solution: Question 15

Peptic ulcers cause acidity related pain and bleeding in the stomach and duodenum. Bacterium, Helicobacter pylori causes peptic ulcers.

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About this Class 9 Practice Test

This test contains 15 MCQs on Why do we fall ill- Assertion & Reason Type Questions with detailed solutions for each question. It is part of the Class 9: Additional Practice course on EduRev, designed to align with the current Class 9 syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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