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CBSE->Plus 1 Biology Science Questions

Total Questions 411
why molecule possessing regular geometry have zero dipole moment?
what is hybridisation?
what is an algae?
What are called planktons? give the importance of phytoplankton?
Find the quantity of heat required to convert 20 g water at 25 degree celsius to steam at 100 degree celsius?
The range and maximum height of a projectile are equal. a)A boy can throw a ball to a maximum height 10m.What is the maximum horizontal distance to which he can throw? b)Arrive an expression to find the velocity of a projectile thrown with an initial velocity u. angle teta after 't' second?
A ball is thrown vertically upwards from top of a tower with a velocity v. Another ball is thrown vertically downwards with same velocity v. Which ball will hit ground with greater velocity?Why?
An arrow shot from a bow is an example of projectile motion a)How does horizontal and vertical component in a projectile motion b)Obtain expression for the time of flight, horizontal range and maximum height for a particle with initial velocity u making angle teta with the horizontal?
A stone is thrown up with a velocity u vector which makes an angle teta with the horizontal a)What are the magnitudes of horizontal and vertical component of velocity? b)How do these components change with time? c)After 't' second what will be the magnitude and direction of the resultant velocity?
A boy throw a cricket ball with a velocity u at an angle teta with the horizontal a)At the heigest point what are the vertical and horizontal component of velocity?
A dimensionless unitless physical quantity A dimensionless quantity but have unit in SI system
When a mass is suspented on a metallic wire the lenth of the wire increase slightl A)Name the law relates to the restoring force devolved in the wire and its deformaton B)draw the stress-strain graph of loading wire and mark a)elastic limit b)fracture point c)plastic region d)elastic region
Which of the following measurement is most accurate?Why? a)500.00kg b)0.005kg c)6.00kg
Determine the value of (A-B)*(A+B)Where A and B are vectors?
If the magnitude of 2 vector and their resultant are same' what is the angle between the 2 vector?
Draw graphically the variation of kinetic energy and potential energy of a free fall body?
Significance of zero vector in physics with an example?
Derive an equation of motion for non uniform motion in 1 dimension?
Can a body have acceleration without velocity.Explain?
the equilibrium constant kc for the decomposition of 'pcl5'is 0.0625mol/L at 300c predict the value of kp?