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CBSE->Plus 1 Biology Science Questions

Total Questions 411
How many moles ofoxygen are required to produce 242g of MgO by burning Magnesium. (Mg = 24, O = 16 )
hOW MANY MOLECULES ARE PRESENT IN 2.24ml of co2 measured at STP?
A bullect of mass 20gm moving with a speed of 120m/s enters a heavy wooden block and is stopped after a distance of 1.2m.What is the average resistive force?
A rectangular block of mass 25kg is pulled forward by a man with a force of 50N.Find the acceleration on the block a.When it is pulled horizotally{Neglect friction} b.When the string tied to the block makes an angle 30 degree with the horizontal. In the above question determine the reaction acting on the body by the floor in each case?
A rectangular block of mass 25kg is pulled forward by a man with a force of 50N.Find the acceleration on the block a.When it is pulled horizotally{Neglect friction} b.When the string tied to the block makes an angle 30 degree with the horizontal.
Two forces 40N and 60N are acting on a body of mass 5kg.If 40N is along positive x direction and 60N along y direction,find the resultant force and acceleration on the body?
We learned Whittaker's five kingdom classification's merit and demerit.New biological classification visualise status should given to virus along with other group then what we suggest the modifications to include virus.Justify?
If we are standing in a stationary bus and driver start the bus suddenly then we thrown backward with a jerk,Why? Similar thing happen when the bus suddenly stop?
Why we said protista have a link with 3 other kingdoms [fungi,animalia and plantae]?
what is haploid & diploid ?
scientific name of butterfly?
what is the scientific name of coconut?
Who is known as the father of mobile phones? Algros or Martyn Cooper?
Do mangoes initially swell up on being pickled. If it is so, why?
A rubber ball of mass 50g falls from a height of 1m and rebounds to a height of 50cm. Find the impulse and the average force between the ball and the ground, if the time during which they were in contact was 0.1s.
calculate the molar mass of the following :(i) water (ii) carbon dioxide
A body is projected upward with a certain velocity. simultaneously another body is dropped from rest from same height.during their acceleration of the first body with respect to second body is -----------
Which is the largest dolphin?
Is swift faster than cheetah?
In a formal letter, whether the subject is above or below the salutation?