REASON AND ASSERTION (a) Both A and R is true but R is correct explanation of A(b) Both A and R is true but R is not correct explanation of A(c) A is true but R is false (d) A is false but R is true (e) Both A and R are false (i) ASSERTION (A) The substance having mass 50kg and volume on the surface of the water REASON (R) The substance with density smaller than the density of water will float on the surface of water(ii) ASSERTION(A) The chemical formula of a molecular compound is determined by the valency of each element REASON(R) In ionic compounds, the charge on vach ion is used to determine the chemicalformula of the compound(iii) ASSERTION (A) The immune system is the defence mechanism of the body to fight pathogensREASON (R) Balance diet is necessary for maintaining healthy body(iv) ASSERTION (A) Collonchyma tissue makes the plant flexible and provide tensile strengthREASON(R) Cell wall of collenchyma cells are irregularly thickened with cellulose and pectin(v) ASSERTION (A) Atom is quite stablREASON (R). The electrons revolve in discrete orbits.(vi) ASSERTION (A) whenever an object falls towards the earth,an acceleration is involved REASON (R) this acceleration is due to the sun's gravitational force(vii)ASSERTION (A).Vermicompost is formed by decomposing matter using earthwormsREASON (R) fertility of soil is temporarily increased using fertilizers(viii) ASSERTION (A) oxygen is harmful for nitrogen fixing bacteriaREASON (R) Nitrosomanas is a nitrogen fixing bacteria(ix) ASSERTION(A) if momentum of a body is doubled, its kinetic energy becomes four foldREASON (R) kinetic energy is proportional to square of momentum(x) ASSERTION (A) A body can't move on a circular path without any acceleration REASON (R) in uniform circular motion,the velocity of the body remains constant pls answer these questions fast ​