Q1) Law of reflection of light is applicable in which types of surfaces.?
Ans- concave, convex, plane surfaces
Q2) SI unit of optical power of lens is?
Ans- diopter
Q3) Direction of electric current is taken opposite to the direction of flow of___?
Ans- electron
Q4) SI unit of electric charge is____?
Ans- coulomb
Q5) which property change with change in gravity?
Ans- weight
Q6) which force is governed by coulombs law?
Ans- electromagnetic force.
Q7) The motion of the moon around the earth is governed by?
Ans- centripetal force
Q8) Twinkling of the star is an effect of which phenomenon?
Ans- refraction
Q9) which lens is used for correction of myopic condition?
Ans- concave
Q10) which type of action take place to produce nuclear energy?
Ans- nuclear fission
Q11) Rain will be classified as acid rain if the pH of rain water is less than___?
Ans- 5.6
Q12) Bleaching powder has chlorine and which chemical element?
Ans- calcium (CaOCl2)
Q13) Bonds which are formed by sharing of an electron pair between two atoms is referred as?
Ans- covalent bond
Q14) The arrangement of elements in modern peroidic table is based on____?
Ans- atomic number.
Q15) what is the chemical name of Mohr's salt?
Ans- Ammonium ferrous sulphate.
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