TNPSC Science Previous Year Questions & Answers – Part – 1

TNPSC Science Previous Year Questions & Answers

Note:

These Questions are collected from previous year TNPSC Question papers (Since 2012)

1. Which one of the following is used in the preparation of seat belts and sails?

1. 1. Teflon B) Buna-S C) Dacron D) PVC
2. Match the following:
   1. Current strength  –  Ohm
   2. Resistance  – Volt
   3. Potential difference  – Coulomb
   4. Quantity of Current – Ampere
3. Assertion(A) : In TAN-A position the arms of deflection magnetometer are placed along Eas, WestReason (R)     : The magnetic field along the axial line of a bar magnet is perpendicular to the horizontal Component of earth‟s magnetic field.Now select your answer according to the coding scheme given below:
   1. Both (A) and (R) correct and (R) is the correct explanation of (A)
   2. Both (A) and (R) are true, and (R) is not the correct explanation of (A)
   3. (A) is true but (R) is false
   4. (A) is false but (R) is true
4. Blood pressure in human is greater at feet than at the brain because.
   1. The distance between feet and the heart is large than between heart and brain
   2. The distance between feet and the heart is small compared to brain
   3. The distance between brain and heart is large than feet
   4. It doesn‟t depend upon the distance /height
5. During respiration, energy is released. It is stored in the form of           
   • A) ADP  B) ATP  C) NADP  D) APP
6. The strength of trees are due to the presence of
   1. Xylem, phloem
   2. Xylem, sclerenchyma
   3. Parenchyma,sclerenchyma
   4. Pholem,parenchyma
7. Show the genotypes of parents that produce offs spring in the ratio of 3- tall animals to 3- dwarf
   1. Tt and tt in 3:3 ratio
   2. TT and Tt in 3:3 ratio
   3. Tt and Tt in 3:3 ratio
   4. tt and tt in 3:3 ratio
8. Identify the correct statements among the following:
   1. The growth of an organism is done by Mitosis
   2. In sexual reproduction of an organism both Mitosis Meiosis are
   3. In asexual reproduction of an organism Meiosis is observed
   4. In animals asexual reproduction iS
      • A) I and II  B) III and IV  C) II and III  D) I and IV
9. Which of the following pair is not a natural pesticide?
   1. Turmeric and Neem
   2. Malathion and DDT
   3. Neems and Castor Oil
   4. Castor Oil and Turmeric
10. Which one of the following is not correctly matched:
    1. Caesium Alkali metal
    2. Uranium Transition metal
    3. Barium Alkaline earth metal
    4. Silver Transition metal
    5. Match List I and II correctly and select your
11. answer using the codes given below:List I                List II
    1. Copper Red
    2. Copper sulphate Black
    3. Cuprous oxide Reddish brown
    4. Cupric oxide Blue

     

    a	b	c	d
    A)        4	1	2	3
    B)        3	4	2	1
    C)        3	4	1	2
    D)        4	3	2	1

12. The machine that picture lie detection in investigating criminals is
    • a) EEG B) ECG  C) Poly graph D) Doppler
13. Pick out the correct one

If we kick a foot ball it flies away but kick a stone of size with equal force it doesn‟t. Because

1. Inertia depends on mass
2. Inertia doesn‟t depend on mass
3. Inertia is inversely proportional to mass
4. Inertia is larger for small mass

14.A force is inclined at 60˚ to the horizontal. If the horizontal component of force is 40kg wt. Calculate vertical component.

A)40kg wt B) 28kg wt. C) 928 kg wt D) 992.8 kg wt

15. Which is /are correct out of the below statements?

1. Vanda is an Epiphyte
2. It has Velamen tissue
3. It is an angiosperm plant
   1. (a),(b) correct (c) wrong
   2. (a),(c) correct (b) wrong
   3. (b), (c) correct (a) wrong
   4. All are correct