# general science mcq questions and answers for competitive exams :: ::

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4306 .An element of atomic no. 29 belongs to
f-block
p-block
d-block
s-block

4307 .The function of the choke is to
Give a relatively large impedance of direct current
Give a relatively large impedance of alternating current
Increase the voltage
Regulate the voltage

4308 .The pitch of sound depends on its
Amplitude
Velocity
Intensity
Frequency

4309 .The element first detected spectroscopically in the Sun's atmosphere is
He
O2
H2
Ne

4310 .KMnO4 can be used as a/an
insecticide
disinfectant
fertiliser
pesticide

4311 .If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound -
1: 4
1: 16
2: 1
4: 1

4312 .The anode of a dry cell is made up of
Zinc
Iron

4313 .The chief source for the production of nitrogeneous fertilizers is:
Nitrogen dioxide
Nitric acid
Nitrogen
Ammonia

4314 .The frequency of ultrasound wave is typically
Below 02 kHz
Above 20 kHz
Above 20,000 kHz
Below 20 kHz

4315 .An object which absorbs all colours & reflects none appears:
white
grey
blue
black

4316 .The chemical name of 'Plaster of Paris' commonly used for setting broken bones is
Calcium carbonate
Calcium sulphate
Calcium nitrate
Calcium chloride

4317 .'Fire-fighting clothes' are made from
Mica
Talc
Steatite
Asbestos

4318 .The 'Green House effect' is produced due to the presence of excess amount of
Nitrogen dioxide
Carbon monoxide
Sulphur dioxide
Methane

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?
1,500 m
2,000 m
500 m
1000 m