a)What is the number of chromosome in human skin cell?1

b)Which is the correct formula to find the focal length of a lens?1

c)Which valve controls the blood flow from right ventricle to right auricle?1

d)Which medicinal plant has the antimicrobial property that can activate digestive process?1

e)Which of the following is a di-hydric alcohol?1

f)If the Earth could be squeezed to the size of the Moon, what would be the effect on the value of acceleration due to gravity of the Earth?1

g)Which of the following fact is correct?1

h)On which of the following factors does specific heat capacity depend upon?1

i)Which of the following group of fundamental units represent the derived unit of energy Joule (J)?1

j)If 500 N force is applied on piston A, how much force is produced on piston B?1

a)What is the name of the blood vessel that carries blood from heart to different parts of the body?1

b)Write the name of compound which is formed when ammonia dissolves in water.1

c)Why carbon dioxide gas is collected in an erect gas jar?1

d)Write a precaution to be taken by a good netizen.1

e)What change does a negative catalyst do in the rate of chemical reaction?1

f)Why is detergent considered less eco-friendly than soap? Give one reason.1

g)When black (Bb) and brown (bb) dog are crossed, what is the genotypic ratio at second filial generation?1

h)A student has faced difficulties in reading letters on the board from last bench due to a defect of vision. Draw a ray diagram of remedy of the problem of that person.1

i)Calculate the refractive index of water, if speed of light in water is 2.25×10⁵ m/s and in air is 3×10⁸ m/s.1