4306 .An element of atomic no. 29 belongs to
A.  f-block
B.  p-block
C.  d-block
D.  s-block
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4307 .The function of the choke is to
A.  Give a relatively large impedance of direct current
B.  Give a relatively large impedance of alternating current
C.  Increase the voltage
D.  Regulate the voltage
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4308 .The pitch of sound depends on its
A.  Amplitude
B.  Velocity
C.  Intensity
D.  Frequency
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4309 .The element first detected spectroscopically in the Sun's atmosphere is
A.  He
B.  O2
C.  H2
D.  Ne
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4310 .KMnO4 can be used as a/an
A.  insecticide
B.  disinfectant
C.  fertiliser
D.  pesticide
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4311 .If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound -
A.  1: 4
B.  1: 16
C.  2: 1
D.  4: 1
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4312 .The anode of a dry cell is made up of
A.  Zinc
B.  Iron
C.  Cadmium
D.  Lead
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4313 .The chief source for the production of nitrogeneous fertilizers is:
A.  Nitrogen dioxide
B.  Nitric acid
C.  Nitrogen
D.  Ammonia
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4314 .The frequency of ultrasound wave is typically
A.  Below 02 kHz
B.  Above 20 kHz
C.  Above 20,000 kHz
D.  Below 20 kHz
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4315 .An object which absorbs all colours & reflects none appears:
A.  white
B.  grey
C.  blue
D.  black
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4316 .The chemical name of 'Plaster of Paris' commonly used for setting broken bones is
A.  Calcium carbonate
B.  Calcium sulphate
C.  Calcium nitrate
D.  Calcium chloride
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4317 .'Fire-fighting clothes' are made from
A.  Mica
B.  Talc
C.  Steatite
D.  Asbestos
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4318 .The 'Green House effect' is produced due to the presence of excess amount of
A.  Nitrogen dioxide
B.  Carbon monoxide
C.  Sulphur dioxide
D.  Methane
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4319 .A car starts from rest and moves on a straight road with a uniform acceleration of 10 m/s2 for the first 10 s. During the next 10 s, the car moves with the velocity it has attained. What is the total distance covered by the carin 20 s?
A.  1,500 m
B.  2,000 m
C.  500 m
D.  1000 m
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4320 .Which among the given waves cannot be polarised -
A.  Infrared
B.  Radio
C.  Ultra violet
D.  Ultrasonic
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