Q1. Sound above what level (in decibel) is considered hazardous noise pollution ?
(a) 30 dB
(b) 40 dB
(c) 60 dB
(d) 80 dB
Q2. Which one of the following metals occurs in nature in free state?
(a) Gold
(b) Sodium
(c) Aluminium
(d) Copper
Q3. Species containing same number of electrons are called—
(a) isotopes
(b) isobars
(c) isoelectronic
(d) isotones
Q4. Baby Blue Syndrome is because of:
(a) Phasphate
(b) Sulphate
(c) Carbonate
(d) Nitrate
Q5. A student finds the writing on the black board as blurred and unclear when sitting on the last desk in a classroom. However, he sees it clearly when sitting on the front desk. Student suffers from a vision defect known as—
(a) hypermetropia
(b) myopia
(c) presbyopia
(d) astigmatism
Q6. When the concentration of water and solutes on either side of the cell membrane is same, the solution is said to be—
(a) hypertonic
(b) isotonic
(c) isotrons
(d) None of these
Q7. Richter scale is used for measuring—
(a) velocity of sound
(b) intensity of light
(c) amplitude of seismic waves
(d) intensity of sound
Q8. A characteristic odour of garlic is due to—
(a) a chloro compound
(b) a fluarine compound
(c) a sulphur compound
(d) acetic acid
Q9. Domestic electrical wiring is basically a—
(a) series connection
(b) parallel connection
(c) combination of series and parallel connections
(d) series connection within each room and parallel connection elsewhere
Q10. One feels heavier in a lift when the lift—
(a) is going down steadily
(b) just begins to go up
(c) is moving up steadily
(d) descends freely
Q11. Non stick cooking utensils are coated with—
(a) polystyrene
(b) PVC
(c) black paint
(d) Teflon
Q12. The colour of tomato is red due to ?
(a)Lycopene
(b)Chromatin
(c)chlorophyll
(d)None of these
Q13. If the body is hollow, then its centre of gravity lies?
(a) Inside the material of the body
(b) Outside the material of the body
(c) At the right end of the body
(d) At the left end of the body
Q14. Function of Iris is –
(a) Formation of image
(b) Protection of eye lens
(c) To regulate the size of pupil
(d) To make the image in inverted condition
Q15. Webbed neck is a characteristic of—
(a) Down's syndrome
(b) Turner's syndrome
(c) Klinefelter's syndrome
(d) Criduchat syndrome
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