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10th Science Chapter wise important five marks

7.CONSERVATION OF ENVIRONMENT

  1. (a) Smoke, smoke everywhere smoke. Do you agree his situations are good for health? (b) List out the harmful effects of coal burning.
  1. (a) Classify the following substances. (wood, paper, plastic and grasses) (b) Give detailed account on your classifications.
  1. In your area there is scarcity of water and due to this people are affected. So, what are the measures to be taken by you to meet out the scarcity of water.
  2. (A) What is green chemistry? (B) write any two principles of green chemistry (C) Mention some of the products produced by the process of green chemistry.
  3. (A)What is global village? (B) what is the use of global village (C) what are the technologies used in global village?
  4. (a) What is an ecosystem? (b) Mention the types of ecosystem (c) Explain the major components in Ecosystem

2.IMMUNE SYSTEM

  1. Kala has delivered a baby. (A) Suggest the immunization schedule for the baby in the first six months (B) what are the diseases that can be cured as per the schedule?
  2. 15th October is observed as “Hand Washing Day”. (a) Tell your friend the effects of hand washing (B) in a day, what are the occasions in which you wash your hand?
  3. (A) Vaccine is to prevent the body from diseases. Suggest the immunization schedule for the baby in the first six months.
  4. B) What are the diseases that can be prevented as per the schedule?
  5. There is a widespread outbreak of Malaria in your area. A) suggest some controlling measures to the local authorities concerned. B) Pick out the right symptom for malaria.( Chill and Shiver and rise in temperature, Diarrhoea)
  6. What are the tests to identify and confirm HIV virus? Give their preventions?
  7. Describe the life cycle of plasmodium in man (Half yearly exam-2017)
  8. What is immunity? Write a note on the various types of immunity?

10.ATOMS AND MOLECULES

  1. State any three findings of modern atomic theory?
  2. write down any two applications of Avogadro’s law
  3. Atoms and molecules are the building blocks of matter. List out any three differences between them.
  4. If 90 g of water is taken in a beaker, find the number of moles in it.
  5. Calculate the gram molecular mass of water from the values of gram atomic mass of hydrogen and of oxygen. Gram atomic mass of hydrogen= 1 g; gram atomic mass of oxygen = 16g
  6. Find how may moles of atoms are there in (A) 2 g of nitrogen (B) 23 g of sodium (C) 40 g of calcium  (D) 1.4 g of lithium  (E) 32 g of sulphur
  7. Calculate the number of moles in : (a) 3.0115 × 10 23 atoms of copper (B) 27.95 g of iron (C) 1.51 × 10 23 molecules of co2  (d) 18.069 × 10 23 atoms of copper  (d) 12.046 × 10 23 atoms of copper (B) 55.9 g of iron
  8. Calculate the number of moles in (i) 81g of aluminium (ii) 4.6 g of sodium  (iii) 5.1 g of ammonia (iv) 2 g of NaOH
  9. Calculate the number of moles in 90 g of water.
  10. How will you establish the relation between vapour density and molecular mass of a gas by appliying Avogadro law? (Quarterly Exam-2017)

 

13.CARBON AND COMPOUNDS

  1. Write the common name and IUPAC name of the following;
  2. a) CH3 CH2 CHO B) CH3COCH3 C) CH3COOH   D) HCHO
  3. E) CH3-CH-CH3

OH                      F) CH3CH2COCH3 G) HCOOH

  1. Fill in the blanks using suitable formula in the given table
SI.NO ALKANE ALKENE ALKYNE
1 C2H6

Ethane

 

Ethene

C2H2

Ethyne

2  

Propane

C3H6

Propene

 

Propyne

3 C4H10

Butane

——

Butene

———

Butyne

 

 

17.MAGNETIC EFFECTS OF ELECTRIC CURRENT AND LIGHT

1. Draw the given diagram and label the following in the diagram.

i)              Incident ray

ii)            Refracted ray

iii)           Emergent ray

iv)           Angle of refraction

v)             Angle of deviation (vi) Angle of emergence

 

(b) The refractive index of diamond is 2.42. What is the meaning of this statement in relation to speed of light?

 

2. (a) copy the diagram of an AC generator and label the parts

(b) what is an   alternating current?

(c) write the principle of the above device

(d) what are the differences between alternating current and direct current?

 

  1. (a) State and explain the defects of vision (b)How can these  defects be corrected? (or) What are the defects of eye? How are these rectified?
  2. The optical prescription of a pair of spectacle is : Right eye:- 3.5 D left eye: 4.00 D
  3. A) Name the defects of the eye? b) Are these lenses thinner at the middle or at the edges (c) which lens  has a greater focal length?
  4. Draw and Label the human eye (a) retina (b) Iris  (c) crystalline lens (d) Aqueous humor (e) Pupil   (f) ciliary muscles  (g) Optic nerve  (h) vitreous humour  (i) cornea

 

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