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Science (English Medium) इयत्ता १२ - CBSE Important Questions

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Seeing the growing cases of diabetes and depression among children, Mr. Chopra, the principal of one reputed school organized a seminar in which he invited parents and principals. They all resolved this issue by strictly banning the junk food in schools and by introducing healthy snacks and drinks like soup, lassi, milk etc. in school canteens. They also decided to make compulsory half an hour physical activities for the students in the morning assembly daily. After six months, Mr. Chopra conducted the health survey in most of the schools and discovered a tremendous improvement in the health of students.

After reading the above passage, answer the following questions :

(i) What are the values (at least two) displayed by Mr. Chopra ?

(ii) As a student, how can you spread awareness about this issue ?

(iii) Why should antidepressant drugs not be taken without consulting a doctor ?

(iv) Give two examples of artificial sweeteners.

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Chemicals in Food - Artificial Sweetening Agents and Food Preservatives

Which one of the following is a disinfectant?
0.2% solution of phenol or 1% solution of phenol 

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Therapeutic Action of Different Classes of Drugs - Antacids

 What is the difference between agonists and antagonists? 

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Drug-target Interaction - Receptors as Drug Targets

Write one example each of Artificial sweetener.

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Chemicals in Food - Artificial Sweetening Agents and Food Preservatives

Write one example each of Antacids.

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Chemicals in Food - Artificial Sweetening Agents and Food Preservatives

Define the following terms with a suitable example of each: 
 Antiseptics 

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Therapeutic Action of Different Classes of Drugs - Antacids

Define the following terms with a suitable example of each: 
 Bactericidal antibiotics 

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Compounds with Medicinal Properties >> Antimicrobials

Why the use of alitame as an artificial sweetener is not recommended? 

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Chemicals in Food - Artificial Sweetening Agents and Food Preservatives

Why type of drug is used in sleeping pills?

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Therapeutic Action of Different Classes of Drugs - Neurologically Active Drugs

Why the use of alitame as an artificial sweetener is not recommended?

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Chemicals in Food - Artificial Sweetening Agents and Food Preservatives

Define the following term with a suitable example in each:
Broad-spectrum antibiotics

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Compounds with Medicinal Properties >> Antimicrobials

Define the following term with a suitable example in each:
Disinfectants

Appears in 1 question paper
Chapter: [16] Chemistry in Everyday Life
Concept: Compounds with Medicinal Properties >> Antimicrobials

Classify the following Web Scripting as Client-Side Scripting and Server Side Scripting

Java Scripting

Appears in 1 question paper
Chapter: [1] Networking and Open Source Software
Concept: Web Scripting - Client Side (VB Script, Java Script, PHP)

Classify the following Web Scripting as Client-Side Scripting and Server Side Scripting

ASP

Appears in 1 question paper
Chapter: [1] Networking and Open Source Software
Concept: Web Scripting - Client Side (VB Script, Java Script, PHP)

Classify the following Web Scripting as Client-Side Scripting and Server Side Scripting

VB Scripting

Appears in 1 question paper
Chapter: [1] Networking and Open Source Software
Concept: Web Scripting - Client Side (VB Script, Java Script, PHP)

Classify the following Web Scripting as Client-Side Scripting and Server Side Scripting

JSP

Appears in 1 question paper
Chapter: [1] Networking and Open Source Software
Concept: Web Scripting - Client Side (VB Script, Java Script, PHP)

Differentiate between communication using Optical Fiber and Ethernet Cable in context of the wired medium of communication technologies.

Appears in 1 question paper
Chapter: [1] Networking and Open Source Software
Concept: Optical Fiber

Janish Khanna used a pen drive to copy files from his friend's laptop to his office computer. Soon his computer started abnormal functioning. Sometimes it would restart by itself and sometimes it would stop different applications running on it. Which of the following options out ·of (i) to (iv), would have caused the malfunctioning of the computer? Justify the reason for your chosen option:

1) Computer Virus

2)Spain Mail

3) Computer Bacteria

4) Trojan Horse

Appears in 1 question paper
Chapter: [1] Networking and Open Source Software
Concept: Threats and Prevention

Ms Raveena Sen is an IT expert and a freelancer. She recently used her skills to access the Admin password for the network server of Super Dooper Technology Ltd. and provided confidential data of the organization to its CEO, informing him about the vulnerability of their network security. Out of the following options (i) to (iv), which one most appropriately defines Ms Sen?

Justify the reason for your chosen option :
1) Hacker

2) Cracker

3) Operator

4) Network Admin

Appears in 1 question paper
Chapter: [1] Networking and Open Source Software
Concept: Cyber Crimes

Hi-Standard Tech Traj.ning Ltd. is a Mumbai based organization which is expanding its office set-up to Chennai. At Chennai office compound, they are planning to have 3 different blocks for Admin, Training and Accounts related activities. Each block has a number of computers, which are required to be connected in a network for communication, data and resource sharing.

As a network consultant, you have to suggest the best network related solutions for them for issues/problems raised by them in (i) to (iv), as per the distances between various blocks/locations and other given parameters.

Shortest differences between various blocks/locations:

Admin Block to Accounts Block 300 Metres
Accounts Block to Training Block 150 Metres
Admin Block to Training Block 200 Metres
MUMBAI Head Office to CHENNAI Office 1300 Km

The number of computers installed at various blocks is as follows:

Training Block 150
Accounts Block 30
Admin Block 40

1) Suggest the most appropriate block/location to house the SERVER in the CHENNAI office (out of the 3 blocks) to get the best and effective connectivity. Justify your answer.

2) Suggest the best-wired medium and draw the cable layout (Block to Block) to efficiently connect various blocks within the CHENNAI office compound.

3) Suggest a device/software and its placement that would provide data security for the entire network of the CHENNAI office.

4) Suggest a device and the protocol that shall be needed to provide wireless Internet access to all smartphone/laptop users in the CHENNAI office

Appears in 1 question paper
Chapter: [1] Networking and Open Source Software
Concept: Network Devices
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CBSE Science (English Medium) इयत्ता १२ Important Questions
Important Questions for CBSE Science (English Medium) इयत्ता १२ Biology
Important Questions for CBSE Science (English Medium) इयत्ता १२ Chemistry
Important Questions for CBSE Science (English Medium) इयत्ता १२ Computer Science (C++)
Important Questions for CBSE Science (English Medium) इयत्ता १२ English Core
Important Questions for CBSE Science (English Medium) इयत्ता १२ English Elective - NCERT
Important Questions for CBSE Science (English Medium) इयत्ता १२ Entrepreneurship
Important Questions for CBSE Science (English Medium) इयत्ता १२ Hindi (Core)
Important Questions for CBSE Science (English Medium) इयत्ता १२ Hindi (Elective)
Important Questions for CBSE Science (English Medium) इयत्ता १२ History
Important Questions for CBSE Science (English Medium) इयत्ता १२ Informatics Practices
Important Questions for CBSE Science (English Medium) इयत्ता १२ Mathematics
Important Questions for CBSE Science (English Medium) इयत्ता १२ Physical Education
Important Questions for CBSE Science (English Medium) इयत्ता १२ Physics
Important Questions for CBSE Science (English Medium) इयत्ता १२ Political Science
Important Questions for CBSE Science (English Medium) इयत्ता १२ Psychology
Important Questions for CBSE Science (English Medium) इयत्ता १२ Sociology
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