General Science Gk Objective Questions Series #54 Ques=(2651-2700)

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General Science Gk Objective Questions Series #54 Ques=(2651-2700)

Question 51 : In vulcanisation, natural rubber is heated with
1. Carbon
2. Silicon
3. Sulphur
4. Phosphorous

 

Question 52 : Which of the following is an element?
1. Ruby
2. Sapphire
3. Emerald
4. Diamond

 

Question 53 : Which of the following is commonly called a ‘polyamide’?
1. Terylene
2. Nylon
3. Rayon
4. Orlon

 

Question 54 : The main constituents of pearls are
1. calcium oxide and ammonium chloride
2. calcium carbonate and magnesium carbonate
3. aragonite and conchiolin
4. ammonium sulphate and sodium carbonate

 

Question 55 : Detergents used for cleaning clothes and utensils contain?
1. bicarbonates
2. bismuthates
3. sulphonates
4. nitrates

 

Question 56 : The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
1. Argon
2. Xenon
3. Helium
4. Krypton

 

Question 57 : From which mineral is radium obtained?
1. Rutile
2. Haematite
3. Limestone
4. Pitchblende

 

Question 58 : The most important ore of aluminium is
1. galena
2. calamine
3. calcite
4. bauxite

 

Question 59 : Knot is a unit of speed of which of the following?
1. Aeroplane
2. Light waves
3. Ship
4. Sound waves

 

Question 60 : Gypsum is added to cement clinker to
1. increase the tensile strength of cement
2. decrease the rate of setting of cement
3. facilitate the formation of colloidal gel
4. bind the particles of calcium silicate

 

Question 61 : The dark lines in the solar spectrum are due to
1. absorption of corresponding wavelengths by the outer layers of the sun
2. destructive interference between waves of certain definite wavelengths
3. absorption of corresponding wavelengths by the prism used in the photograph
4. absence of corresponding wavelengths from the light emitted by the core of the sun

 

Question 62 : Which metal pollute the air of a big city?
1. Copper
2. Chromium
3. Lead
4. Cadmium

 

Question 63 : Galvanised iron sheets have a coating of
1. lead
2. chromium
3. zinc
4. tin

 

Question 64 : In fireworks, the green flame is produced because of
1. sodium
2. barium
3. mercury
4. potassium

 

Question 65 : Atoms are composed of
1. electrons and protons
2. electrons only
3. protons only
4. electrons and nuclei

 

Question 66 : Brass gets discoloured in air because of the presence of which of the following gases in air?
1. Oxygen
2. Hydrogen sulphide
3. Carbon dioxide
4. Nitrogen

 

Question 67 : Permanent hardness of water may be removed by the addition of
1. sodium carbonate
2. alum
3. potassium permanganate
4. lime

 

Question 68 : ‘No two electrons in an atom can have the same set of four quantum numbers’ is
1. Newton’s law
2. Bohr’s law
3. Aufbau principle
4. Pauli’s exclusion principle

Question 69 : Which of the following does not contain a coinage metal?
1. Silver and Gold
2. Zinc and Gold
3. Copper and Silver
4. Copper and Gold

 

Question 70 : Most soluble in water is
1. camphor
2. sulphur
3. common salt
4. sugar

 

Question 71 : Atoms of an element differ from those of all other elements in
1. atomic number and electronic configuration
2. number of neutrons and number of valence electrons
3. atomic number and number of valence electrons
4. number of neutrons and electronic configuration

 

Question 72 : Soap is a mixture of sodium or potassium salts of
1. dicarboxylic acids
2. monocarboxylic acids
3. glycerol
4. tricarboxylic acids

 

Question 73 : Air is a/an
1. compound
2. element
3. electrolyte
4. mixture

 

Question 74 : Fathom is the unit of
1. sound
2. depth
3. frequency
4. distance

 

Question 75 : The type of glass used in making lenses and prisms is
1. jena glass
2. soft glass
3. pyrex glass
4. flint glass

 

Question 76 : One horse power is equal to
1. 746 watts
2. 748 watts
3. 756 watts
4. 736 watts

Question 77 : Very small time intervals are accurately measure by
1. White dwarfs
2. Quartz clocks
3. Atomic clocks
4. Pulsars

 

Question 78 : Which of the following rays are more penetrating?
1. Beta rays
2. Alpha rays
3. Gamma rays
4. X-rays

 

Question 79 : Among the various allotropes of carbon,
1. coke is the hardest[comma] graphite is the softest
2. diamond is the hardest[comma] coke is the softest
3. diamond is the hardest[comma] graphite is the softest
4. diamond is the hardest[comma] lamp black is the softest

Question 80 : Potassium nitrate is used in
1. medicine
2. fertiliser
3. salt
4. glass

Question 81 : Who suggested that most of the mass of the atom is located in the nucleus?
1. Thompson
2. Bohr
3. Rutherford
4. Einstein

Question 82 : Actinides are the elements with atomic numbers from
1. 97 to 104
2. 101 to 115
3. 89 to 103
4. 36 from 43

Question 83 : Nuclear fission is caused by the impact of
1. neutron
2. proton
3. deuteron
4. electron

 

Question 84 : Wood is the main raw material for the manufacture of
1. paint
2. paper
3. ink
4. gun powder

 

Question 85 : Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?
1. Thorium
2. Radium
3. Plutonium
4. Radan

 

Question 86 : Non stick cooking utensils are coated with
1. Teflon
2. PVC
3. black paint
4. polystyrene

 

Question 87 : Washing soda is the common name for
1. Sodium carbonate
2. Calcium bicarbonate
3. Sodium bicarbonate
4. Calcium carbonate

 

Question 88 : In an atomic nucleus, neutrons and protons are held together by
1. gravitational forces
2. exchange forces
3. coulombic forces
4. magnetic forces

 

Question 89 : Electric current is measure by
1. commutator
2. anemometer
3. ammeter
4. voltmeter

Question 90 : Chlorophyll is a naturally occurring chelate compound in which central metal is
1. copper
2. magnesium
3. iron
4. calcium

Question 91 : The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
1. bromine
2. fluorine
3. chlorine
4. sulphur

 

Question 92 : Which of the following is a protein?
1. Natural rubber
2. Starch
3. Cellulose
4. None of these

 

Question 93 : Quartz crystals normally used in quartz clocks etc. is chemically
1. silicon dioxide
2. germanium oxide
3. a mixture of germanium oxide and silicon dioxide
4. sodium silicate

 

Question 94 : The isotope of uranium capable of sustaining chain reaction is
1. U-235
2. U-245
3. U-239
4. U-238

Question 95 : Which of the following is used as a moderator in nuclear reactor?
1. Thorium
2. Graphite
3. Radium
4. Ordinary water

Question 96 : Reading of a barometer going down is an indication of
1. snow
2. storm
3. intense heat
4. rainfall

Question 97 : The average salinity of sea water is
1. 3%
2. 3.50%
3. 2.50%
4. 2%

Question 98 : The gas usually filled in the electric bulb is
1. nitrogen
2. hydrogen
3. carbon dioxide
4. oxygen

 

Question 99 : Potassium Permanganate is used for purifying drinking water, because
1. it is a sterilising agent
2. it dissolves the impurities of water
3. it is a reducing agent
4. it is an oxidising agent

Question 100 : Which of the following was to be discovered first in the chromospheres of the sun?
1. Krypton
2. Xenon
3. Neon
4. Helium

General Science Gk Objective Questions Series #54 Ques=(2651-2700) 

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