HALF MARKS

1.Melting point of ice(OR) Freezing point of water (OR)Solidification of water = 0⁰ C or 273K

 2.Boiling point of water = 100⁰ C or 373K

 3.Specific heat of ice(S)= 0.5 cal/g- ⁰ C

4. Specific heat of water(S)= 1 cal/g- ⁰ C

 5.Latent heat of fusion of ice(L)=80 cal/g

6. Latent heat of vaporization of water(L)=540 cal/g

 7.Refractive index of air(n)=1.0003 or 1

8.Refractive index of Diamond(n)=2.42

 9.Critical angle of Diamond=24.4⁰

10.At critical angle of incidence, the angle of refraction=90⁰

11.Sign of the object distance from the lens taken as –ve

12.Focal length of the convex or convergent lens taken as +ve

13. Focal length of the concave or divergent lens taken as –ve

14.Least distance of distinct vision of human being is 25 cm

Least distance of distinct vision at young age is 7 or 8 cm

Least distance of distinct vision at old age is 1 to 2 m or even more

The angle of vision for a healthy human being is 60⁰

18.Range of the focal length of the human eye lens is

2.27cm (Minimum) to 2.5 cm (Maximum)

19.Distance between eye lens to retina is 2.5 cm

20.Number of receptors in retina is 125 million

If person suffering from Myopia , then Focal length is less than 2.5 cm

If person suffering from Hypermetropia, then Focal length is more than 2.27 cm

Rainbow is formed when the angle between the incoming and outgoing rays are 40⁰ C to 42⁰

The intensity is maximum at 90⁰angle of scattering

25.Range of resistance of the human body is 100Ω to 500000Ω

26. 1KWH=3.6x10⁶J

The p^H of neutral solutions is 7

The p^H of acidic solutions is 0 to below 7

The p^H of basic solutions is above 7 to 14

The p^H scale is from 0-14

Tooth decay start when the p^H of mouth is lower than 5.5

32.Number of water molecules present in washing soda is 10

33.The value of Plank constant =6.626x10^-34 Js

34.l value of s-orbital is 0

l value of p-orbital is 1

l value of d-orbital is 2

37.(n+l) value of 3d orbital =(3+2)=5

38.Spin of electron is +1/2 means clockwise direction 39.Spin of electron is -1/2 means anticlock wise direction

1 pm(pico meter)=10^-12 m

No.of periods and no.of groups in modern periodic table are 7 and 18

In NaCl crystal, coordination number of Na⁺ is 6 and coordination number of Cl^- is 6

Bond angle in BeCl₂ is 180⁰

44.Bond angle in NH₃ is 107⁰48¹

45. Bond angle in BF₃ is 120⁰

46.Bond angle in H₂O is 104⁰31¹

47.Bond angle in CH₄ is 109⁰28¹

48.No.Of carbons in Buckminsterfullerene is 60

49.Fullerene(C₆₀) contains 12 pentagonal and 20 hexagonal faces

1.S.I unit of Temperature is Kelvin(K)

2.S.I unit of Heat is Joule (J)

3. C.G.S unit of Heat is calorie (cal)

4.S.I unit of Specific heat is J/kg-K 5.CGS unit of Specific heat is cal/g- ⁰c

6.S.I unit of Latent heat is J/kg

7. CGS unit of Latest heat is cal/g

8.S.I or CGS unit of refractive index is no unit

9.S.I unit of power of the lens is dioptre(D)

10.S.I unit of Current is ampere(A) or C/s

11.S.I unit of electric charge(Q) is Coloumb(C)

12.S.I unit of potential or potential difference or electromotive force(emf) is volt(V)

13.S.I unit of resistance is Ohm(Ω)

14.S.I unit of Specific resistance or Resistivity is ohm-m (Ω-m)

15.S.I unit of conductance is mho or Ω^-1

16.S.I unit of conductivity is (Ω-m)^-1

17.S.I unit of electric power is watt

18.S.I unit of electric energy is KWH

19.S.I unit of Magnetic flux is weber

20.S.I unit of Magnetic flux density or Magnetic field or magnetic field induction (B) is wb/m² or tesla

21.S.I unit of Induced emf is volt

22.Units of atomic radius is pico meter(pm)

23.Unit of Ionization energy is KJ/mol

1.S-orbital (OR) l=0 shape is Spherical

2. p-orbital (OR) l=1 shape is dumbbell

3.d-orbital (OR) l=2 shape is double dumbbell

4.NaCl – Face centered cubic lattice crystal structure

5.Methane (CH₄) shape is Tetrahedral

BeCl₂ shape is Linear

BF₃ shape is Trigonal planar

NH₃ shape is pyramidal

H₂O shape is V-shape

Diamond shape is Tetrahedral environment

11.Graphite shape is Trigonal Planar environment

12.Buckminsterfullerene(C₆₀) shape is Soccer ball

13.For ohmic conductors, the shape of V-I graph is Straight line passing through origin

14.For non-ohmic conductors, the shape of V-I graph is curved