Everyday Science Test 24

Total Questions: 30

2 - The point on the principle axis at which the reflected rays converge or diverge is called

A ) Pole
B ) Center of curvature
C ) Radius of curvature
D ) Focus ✅

3 - A water wave is an example of

A ) Diffracted wave
B ) Electromagnetic waves
C ) Longitudinal wave
D ) Transverse wave ✅

4 - Sound waves cannot be

A ) Reflected
B ) Refracted
C ) Diffracted
D ) Polarised ✅

5 - Beats can be heard separately only if the number of beats produced is

A ) Less than 10 per second ✅
B ) Less then 16 per second
C ) More the 10 per second
D ) More than 16 per second

6 - Colour of light is determined by its

A ) Velocity in air
B ) Amplitude
C ) Frequency ✅
D ) State of polarization

7 - If there were no atmosphere then the duration of the day light in earth will

A ) Decrease ✅
B ) Increase
C ) Remain unchanged
D ) Depend upon the weather

8 - Echo is formed as a result of

A ) Refraction of sound
B ) Interference of sound
C ) Diffraction of sound
D ) Reflection of sound ✅

10 - The frequency of sound an average man can hear is

A ) 10 to 10,000Hz
B ) 15 to 15,000 Hz
C ) 20 to 20,000 Hz ✅
D ) 25 to 25,000 Hz

11 - X-rays are produced when a stream of electrons in an x-raysm tube?

A ) Hits the glass wall of the tube
B ) Strikes metal target ✅
C ) Pass through a strong magnetic field
D ) None

12 - Which of the following is non metallic material?

A ) Bauxite
B ) Gypsum ✅
C ) Magnesium
D ) Manganese

13 - Bauxite is an ore of

A ) Iron
B ) Zinc
C ) Tin
D ) Aluminum ✅

14 - Which of the following represents a chemical change?

A ) Heating of mercuric acid ✅
B ) Sublimation of iodine
C ) Evaporation of alcohol
D ) Heating of platinum wire

15 - Nitrogen in laboratory is prepared by heating

A ) Ammonium nitrate
B ) Ammonium sulfate
C ) Mixture of ammonium chloride and sodium nitrate ✅
D ) Mixture of ammonium chloride and calcium oxide

16 - Material used bleaching pulp is

A ) Lime ✅
B ) Alum
C ) Sodium hypochlorite
D ) Caustic soda

17 - Which metal forms an amalgams which other metals?

A ) Tin
B ) Zinc
C ) Mercury ✅
D ) Lead

19 - Which of the following is not a bleaching agent?

A ) Chlorine
B ) Sulphur dioxide
C ) Sodium hypochlorite
D ) Carbon dioxide ✅

21 - Sodium pump operates in

A ) Muscle contraction
B ) Heart beat
C ) Nerve impulse ✅
D ) None

22 - Besides ear ossicles, the cavity of the middle ear in human beings contain

A ) Air ✅
B ) Endolymph
C ) Perilymph
D ) Octoconia

23 - The male sex hormone, testosterone is secreted by the

A ) Bartholin's glands
B ) Cowper's grands
C ) Graafian follicle
D ) Leydid cells ✅

24 - With which of the following is the term glomerulus associated

A ) Excretory system ✅
B ) Digestive system
C ) Nervous system
D ) Representative system

25 - The chamber behind the lens of eye is filled with a fluid known as

A ) Perilymph
B ) Aqueous humor
C ) Vitreous humor ✅
D ) None

26 - Which of the following layer of eye is richly supplied with fine blood vessel?

A ) Sclerotic
B ) Choroid ✅
C ) Retina
D ) All of these

28 - In man ventricular systole lasts about

A ) 0.44sec
B ) 0.48sec
C ) 0.4sec
D ) 0.33sec ✅

29 - Osmotic pressure of the body is regulated by

A ) Magnesium
B ) Sodium ✅
C ) Iodine
D ) Iron

30 - The most abundant muscle protein is

A ) Actin
B ) Troponin
C ) Myosin ✅
D ) Tropomyosin