Everyday Science Test 2
Total Questions: 25
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A ) Increasing the temperature of water
B ) Reacting chemically with dirt
C ) Reducing the surface tension of water ✅
D ) Dissolving dirt
A ) Viscosity of ink
B ) Capilliary action phenomenon ✅
C ) Diffusion of ink through the blotting
D ) Siphon action
A ) Surface tension ✅
B ) Viscosity
C ) Specific gravity
D ) Elasticity
A ) An accelerated motion
B ) No acceleration at all
C ) Uniform acceleration ✅
D ) Uneven acceleration
A ) A binocular
B ) A camera
C ) An epidiascope ✅
D ) A stereoscope
A ) 0°C
B ) 4°C ✅
C ) 4°K
D ) 4.8°C
A ) Einstein
B ) Newton
C ) Gahleo
D ) Hubble ✅
A ) Lactometer ✅
B ) Hygrometer
C ) Manometer
D ) Sonometer
A ) Precipitation
B ) Hailstorm
C ) Condensation ✅
D ) Formation of ice
A ) Sodium chloride
B ) Calcium phosphate ✅
C ) Sugar
D ) Calcium Sulphate
A ) Glucose
B ) Surcose
C ) Maltose
D ) Fructose ✅
A ) Centrifugation ✅
B ) Dialysis
C ) Reverse osmosis
D ) Diffusion
A ) Pasteur
B ) Newton
C ) Watson
D ) Henry Becquerel ✅
Explanation:
- Radioactivity was discovered by Becquerel.
- Radioactivity emerges from: Nuclear energy.
- Radioactivity is measured by which device Geiger counter.
- Thorium metal is not only magnetic but also radioactive Radioactive element are Plutonium, Thorium, Uranium.
- Alpha rays is a positively charged particle emitted by a radioactive element.
- A negatively charged particle emitted by a radioactive element during radioactive decay is called a beta particle.
- Radioactive isotopes are used in medicine for both diagnostic imaging and treatment.
- A 100 g sample of a radioactive element has a half life of 5 days. 12.5grams of radioactive material will remain after 15 days.
- Radioactive elements have atomic number greater than82.
- Weak Nuclear Force is responsible for the radioactive decay of the nucleus.
- The radioactive material must be placed in a box of Lead.
- Radioactive cobalt 60 is used for curing: Cancerous cells.
- Radioactive isotope present in atmosphere is: carbon -14.
- Unstable nuclei are radioactive.When radioactivity rays are passed through air or any gas, they cause it to Ionize.
A ) Hydrogen
B ) Helium ✅
C ) Carbon
D ) Hydrogen Sulphide
A ) Increasing the length of the rod
B ) Increasing the weight of the bob
C ) Reducing the length of the rod ✅
D ) Reducing the weight of the bob
A ) Upward with uniform speed
B ) Downward with uniform acceleration
C ) Upward with uniform acceleration
D ) In a free fall due to failure of the lift mechanism ✅
A ) 20 dB
B ) 60 dB
C ) 100 dB ✅
D ) 160 dB
A ) 63% tin and 37% lead ✅
B ) 63% lead and 37% tin
C ) 63% tin and 37% aluminum
D ) 63% lead and 37% aluminum
A ) Carbon dioxide
B ) Chlorofluorocarbons ✅
C ) Nitrogen oxide
D ) Methane
A ) A single force
B ) Two forces acting on the same direction
C ) Two forces acting along different lines and in opposite directions
D ) A pair of forces acting along the same line and in opposite direction ✅
A ) Ductility
B ) Malleability ✅
C ) Conductivity
D ) Density
A ) Scatters blue light
B ) Reflects blue light ✅
C ) Transmits blue light
D ) Has actual blue cover
A ) Prop him up if he falls.
B ) Spread out his weight and reduce the pressure on the rope
C ) Add extra weight to keep the rope tightly stretched
D ) To keep the centre of gravity always vertically above the rope ✅
A ) Water expands on freezing ✅
B ) Bottle contracts at freezing point
C ) Temperature outside the bottle is less than that inside the bottle
D ) None of these
A ) A decrease in the rate of photosynthesis ✅
B ) An increase in the rate of photosynthesis
C ) A decrease in the rate of respiration
D ) No effect on either photosynthesis or respiration