Science Part 1 Question Bank Solution – Q.1 (B) VI. Write the name:

1. The atom having the biggest atomic size from period 2.
Ans: Lithium (Li)

2. The atom having the smallest atomic radius from zero group.
Ans: Helium (He)

3. The family of group 1 elements.
Ans: Alkali metals

4. Highest reactive nonmetal.
Ans: Fluorine (F)

5. The element having stable electron configuration from the third period.
Ans: Argon (Ar)

6. A halogen from period 4.
Ans: Bromine (Br)

7. The family of elements having zero valency.
Ans: Noble gases/Inert gases

8. Two elements having two orbits
Ans: Carbon (C), oxygen (O)

9. Highest electronegative element
Ans: Fluorine (F)

10. Highest electropositive element
Ans: Francium (Fr)

11. The atom having smallest atomic radius from group 1.
Ans: Hydrogen (H)

12. The group of elements having electronic configuration 2, 2.
Ans: Group 2

13. Products obtained when sugar is heated.
Ans: Carbon and water vapour

14. The phase in which solid substances are converted into liquid.
Ans: Melting

15. The amount of heat absorbed at constant temperature by unit mass of a liquid to convert into gaseous phase.
Ans: Specific latent heat of vaporisation

16. Conversion of ice into liquid due to applied pressure and the reconverts to ice once the pressure is removed.
Ans: Regelation

17. The instrument used to study anomalous behaviour of water
Ans: Hope’s apparatus

18. The instrument used to measure the specific heat capacity of a substance using mixture method.
Ans: Calorimeter

19. The distance between focus and optical centre
Ans: Focal length

20. The part of human eye that transmits electrical signals to the brain
Ans: Optic nerve

21. The lens used in simple microscope
Ans: Convex

22. The ability of lens to adjust the focal length as per need is
Ans: Power of accommodation

23. The defect of eye occurring due to ageing.
Ans: Presbyopia

24. The fleshy screen behind cornea
Ans: Iris

25. The screen with light sensitive cells in human eye.
Ans: Retina

26. The sensation on the retina persists for a while is
Ans: Persistence of vision

27. The persons which are unable to distinguish between different colours
Ans: Colour blind

28. The imaginary line passing through two optical centres of lens
Ans: Principal axis

29. The molecular formula of main ore of aluminium –
Ans: Al2O3.nH2O

30. The device used for grinding an ore
Ans: Ball mill

31. Nonmetal which is a good conductors of electricity.
Ans: Graphite

32. The reagent which dissolves noble metals.
Ans: Aqua regia

33. Metals which are amphoteric in nature –
Ans: Aluminium (Al), zinc (Zn)

34. An alloy of copper and tin –
Ans: Bronze

35. Two highly reactive metals –
Ans: Lithium (Li), sodium (Na)

36. The process of strong heating of carbonate ores in insufficient air –
Ans: Calcination

37. The process of extraction of aluminium from alumina-
Ans: Electrolytic reduction

38. Method used to prevent corrosion of copper –
Ans: Anodization and/or tinning