List of top Questions asked in CBSE CLASS XII- 2025

Which of the following signs define a formula?
............... arises because of incentives or external rewards.
The following are the characteristics of positive stress except:
Which of the following is not a stage of active listening?
Write the various purposes of Automotive Electrical System.
Ankita/Ankit is working as a mechanic in an automobile workshop. She/He receives a car for repair with the defect, transmission is noisy in neutral speed position. Advise her/him to check for various probable causes of defect with their remedies.
With the help of a proper layout, show the classification of suspension springs. Explain torsion bar spring.
Explain the working principle of hydraulic power steering in neutral (straight-ahead) position and while turning.
Write the names of the various main parts of a commonly used car washer.
Name the various advanced technologies adopted in emission control.
What do you understand by fuel delivery system/control in electronic fuel injection?
What do you understand by differential?
Name the natural sources of emissions occurring in nature.
Write the utility of universal joint in transmission.
Name the various types of hydraulic shock absorbers.
Write any two disadvantages of power steering.
Write the working principle of air compressor.
What do you understand by “Decisiveness” as an exercise of entrepreneurial attitude?
Write the role of green jobs in limiting greenhouse emissions.
Name any three components of a Calc screen.
How can ‘living in present’ be a source of motivation and inspiration?
What do you understand by exclamatory sentence?
Any kind of substance released into the air from natural or human sources — discharge of gases, liquid droplets or solid particles, is called ............... .
Multi Point Fuel Injection uses several injectors, normally respective to number of engine cylinders and placed at the ............... of each cylinder.
In the operation of voltage regulator, as the generator speed rises, the current flowing through the shunt coil of regulator ............... .