_When an iron nail gets rusted, iron oxide is formed$?

Without any change in colour or weight of the nail

Without any change in the weight of the nail

With decrease in the weight of the nail

With increase in the weight of the nail

Without any change in colour or weight of the nail

How does common salt help in separating soap from the solution after saponification?$?

By decreasing solubility of Soap

By increasing solubility of Soap

Paper is manufactured by$?

Wood, sodium and bleaching powder

Wood, calcium, hydrogen sulphide and resin.

The dark lines in the solar spectrum are due to$?

Destructive interference between waves of certain definite wavelengths.

Absorption of corresponding wavelengths by the outer layers of the sun.

Destructive interference between waves of certain definite wavelengths.

Absorption of corresponding wavelengths by the prism used in the photograph.

Absence of corresponding wavelengths from the light emitted by the core of the sun.

Paper is manufactured by?

Wood, sodium and bleaching powder

Wood, calcium, hydrogen sulphide and resin.

How does common salt help in separating soap from the solution after saponification??

By decreasing solubility of Soap

By increasing solubility of Soap

The dark lines in the solar spectrum are due to?

Destructive interference between waves of certain definite wavelengths.

Absorption of corresponding wavelengths by the outer layers of the sun.

Destructive interference between waves of certain definite wavelengths.

Absorption of corresponding wavelengths by the prism used in the photograph.

Absence of corresponding wavelengths from the light emitted by the core of the sun.

179 + Mcqs in General Science in General Knowledge Page 3 McqOptions

101.	_Potassium nitrate is used in$?
A.	Medicine
B.	Fertilizer
C.	Salt
D.	Glass
Answer» C. Salt

Discussion

102.	_The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is$?
A.	Argon
B.	Xenon
C.	Helium
D.	Krypton
Answer» D. Krypton

Discussion

103.	_When an iron nail gets rusted, iron oxide is formed$?
A.	Without any change in the weight of the nail
B.	With decrease in the weight of the nail
C.	With increase in the weight of the nail
D.	Without any change in colour or weight of the nail
Answer» D. Without any change in colour or weight of the nail

Discussion

104.	_Chemical formula for water is$?
A.	NaA1O2
B.	H2O
C.	Al2O3
D.	CaSiO3
Answer» C. Al2O3

Discussion

105.	_Bromine is a$?
A.	Black Solid
B.	Red Liquid
C.	Colourless Gas
D.	Highly Inflammable Gas
Answer» C. Colourless Gas

Discussion

106.	Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?$?
A.	Television
B.	Refrigerator
C.	Tube light
D.	Cooking gas
Answer» C. Tube light

Discussion

107.	In fireworks, the green flame is produced because of$?
A.	Sodium
B.	Barium
C.	Mercury
D.	Potassium
Answer» C. Mercury

Discussion

108.	Decibel is the unit for$?
A.	Speed of light
B.	Radio wave frequency
C.	Intensity of sound
D.	Intensity of heat
Answer» D. Intensity of heat

Discussion

109.	Which of the following metals remain in liquid for under normal conditions?$?
A.	Radium
B.	Zinc
C.	Uranium
D.	Mercury
Answer» E.

Discussion

110.	Water is a good solvent of ionic salts because:$?
A.	It has a high specific heat
B.	It has no colour
C.	It has a high dipole moment
D.	It has a high boiling point
Answer» D. It has a high boiling point

Discussion

111.	What cause a moving body to resist a change in its state of motion?$?
A.	Displacement
B.	Acceleration
C.	Inertia
D.	Velocity
Answer» D. Velocity

Discussion

112.	Which layer protects earth from harmful rays of the Sun?$?
A.	Ionosphere
B.	Ozone layer
C.	Troposphere
D.	Magnetosphere
Answer» C. Troposphere

Discussion

113.	How does common salt help in separating soap from the solution after saponification?$?
A.	By decreasing density of Soap
B.	By decreasing solubility of Soap
C.	By increasing density of Soap
D.	By increasing solubility of Soap
Answer» C. By increasing density of Soap

Discussion

114.	Paper is manufactured by$?
A.	Wood and resin
B.	Wood, sodium and bleaching powder
C.	Wood, calcium, hydrogen sulphide and resin.
D.	Wood and bleaching powder
Answer» D. Wood and bleaching powder

Discussion

115.	Electric bulb filament is made of$?
A.	Copper
B.	Aluminum
C.	Lead
D.	Tungsten
Answer» E.

Discussion

116.	Which of the following metals forms an amalgam with other metals?$?
A.	Tin
B.	Mercury
C.	Lead
D.	Zinc
Answer» C. Lead

Discussion

117.	Which of the gas is not known as green house gas?$?
A.	Methane
B.	Nitrous oxide
C.	Carbon dioxide
D.	Hydrogen
Answer» E.

Discussion

118.	Which of the following is used as a lubricant?$?
A.	Graphite
B.	Silica
C.	Iron Oxide
D.	Diamond
Answer» B. Silica

Discussion

119.	The average salinity of sea water is$?
A.	3%
B.	3.5%
C.	2.5%
D.	2%
Answer» C. 2.5%

Discussion

120.	Heavy water is:$?
A.	Deuterium oxide
B.	PH7
C.	Rain water
D.	Tritium oxide
Answer» B. PH7

Discussion

121.	Carbon, diamond and graphite are together called:$?
A.	Allotrope
B.	Isomers
C.	Isomorphs
D.	Isotopes
Answer» B. Isomers

Discussion

122.	Most soluble in water is:$?
A.	Camphor
B.	Sulphur
C.	Common salt
D.	Sugar
Answer» E.

Discussion

123.	From which mineral is radium obtained?$?
A.	Rutile
B.	Haematite
C.	Limestone
D.	Pitchblende
Answer» E.

Discussion

124.	Wood is the main raw material for the manufacture of$?
A.	Paint
B.	Paper
C.	Ink
D.	Gun powder
Answer» C. Ink

Discussion

125.	What is the wavelength of visible spectrum?$?
A.	8500 - 9800 angstrom
B.	7800 - 8000 angstrom
C.	3900 - 7600 angstrom
D.	1300 - 3000 angstrom
Answer» D. 1300 - 3000 angstrom

Discussion

126.	The dark lines in the solar spectrum are due to$?
A.	Absorption of corresponding wavelengths by the outer layers of the sun.
B.	Destructive interference between waves of certain definite wavelengths.
C.	Absorption of corresponding wavelengths by the prism used in the photograph.
D.	Absence of corresponding wavelengths from the light emitted by the core of the sun.
Answer» B. Destructive interference between waves of certain definite wavelengths.

Discussion

127.	Nuclear fission is caused by the impact of:$?
A.	Neutron
B.	Proton
C.	Deuteron
D.	Electron
Answer» B. Proton

Discussion

128.	Which of the following is commonly called a 'poly-amide'?$?
A.	Terylene
B.	Nylon
C.	Rayon
D.	Orlon
Answer» C. Rayon

Discussion

129.	One Joule is equal to$?
A.	105 ergs
B.	103 ergs
C.	107 ergs
D.	1011 ergs
Answer» D. 1011 ergs

Discussion

130.	Knot is a unit of speed of which of the following?$?
A.	Aeroplane
B.	Light waves
C.	Ship
D.	Sound waves
Answer» D. Sound waves

Discussion

131.	Isotopes are separated by:$?
A.	Crystallisation
B.	Sublimation
C.	Distillation
D.	Filtration
Answer» D. Filtration

Discussion

132.	One Joule is equal to?
A.	105 ergs
B.	103 ergs
C.	107 ergs
D.	1011 ergs
Answer» D. 1011 ergs

Discussion

133.	Paper is manufactured by?
A.	Wood and resin
B.	Wood, sodium and bleaching powder
C.	Wood, calcium, hydrogen sulphide and resin.
D.	Wood and bleaching powder
Answer» D. Wood and bleaching powder

Discussion

134.	How does common salt help in separating soap from the solution after saponification??
A.	By decreasing density of Soap
B.	By decreasing solubility of Soap
C.	By increasing density of Soap
D.	By increasing solubility of Soap
Answer» C. By increasing density of Soap

Discussion

135.	Which layer protects earth from harmful rays of the Sun??
A.	Ionosphere
B.	Ozone layer
C.	Troposphere
D.	Magnetosphere
Answer» C. Troposphere

Discussion

136.	What cause a moving body to resist a change in its state of motion??
A.	Displacement
B.	Acceleration
C.	Inertia
D.	Velocity
Answer» D. Velocity

Discussion

137.	Which of the following is commonly called a 'poly-amide'??
A.	Terylene
B.	Nylon
C.	Rayon
D.	Orlon
Answer» C. Rayon

Discussion

138.	Nuclear fission is caused by the impact of:?
A.	Neutron
B.	Proton
C.	Deuteron
D.	Electron
Answer» B. Proton

Discussion

139.	Wood is the main raw material for the manufacture of?
A.	Paint
B.	Paper
C.	Ink
D.	Gun powder
Answer» C. Ink

Discussion

140.	Isotopes are separated by:?
A.	Crystallisation
B.	Sublimation
C.	Distillation
D.	Filtration
Answer» D. Filtration

Discussion

141.	Knot is a unit of speed of which of the following??
A.	Aeroplane
B.	Light waves
C.	Ship
D.	Sound waves
Answer» D. Sound waves

Discussion

142.	The dark lines in the solar spectrum are due to?
A.	Absorption of corresponding wavelengths by the outer layers of the sun.
B.	Destructive interference between waves of certain definite wavelengths.
C.	Absorption of corresponding wavelengths by the prism used in the photograph.
D.	Absence of corresponding wavelengths from the light emitted by the core of the sun.
Answer» B. Destructive interference between waves of certain definite wavelengths.

Discussion

143.	What is the wavelength of visible spectrum??
A.	8500 - 9800 angstrom
B.	7800 - 8000 angstrom
C.	3900 - 7600 angstrom
D.	1300 - 3000 angstrom
Answer» D. 1300 - 3000 angstrom

Discussion

144.	Electric bulb filament is made of?
A.	Copper
B.	Aluminum
C.	Lead
D.	Tungsten
Answer» E.

Discussion

145.	Very small time intervals are accurately measure by?
A.	White dwarfs
B.	Quartz clocks
C.	Atomic clocks
D.	Pulsars
Answer» D. Pulsars

Discussion

146.	Most soluble in water is:?
A.	Camphor
B.	Sulphur
C.	Common salt
D.	Sugar
Answer» E.

Discussion

147.	From which mineral is radium obtained??
A.	Rutile
B.	Haematite
C.	Limestone
D.	Pitchblende
Answer» E.

Discussion

148.	Heavy water is:?
A.	Deuterium oxide
B.	PH7
C.	Rain water
D.	Tritium oxide
Answer» B. PH7

Discussion

149.	Carbon, diamond and graphite are together called:?
A.	Allotrope
B.	Isomers
C.	Isomorphs
D.	Isotopes
Answer» B. Isomers

Discussion

150.	Which of the following is used as a lubricant??
A.	Graphite
B.	Silica
C.	Iron Oxide
D.	Diamond
Answer» B. Silica

Discussion

Explore topic-wise MCQs in General Knowledge.

_Potassium nitrate is used in$?

_The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is$?

_When an iron nail gets rusted, iron oxide is formed$?

_Chemical formula for water is$?

_Bromine is a$?

Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?$?

In fireworks, the green flame is produced because of$?

Decibel is the unit for$?

Which of the following metals remain in liquid for under normal conditions?$?

Water is a good solvent of ionic salts because:$?

What cause a moving body to resist a change in its state of motion?$?

Which layer protects earth from harmful rays of the Sun?$?

How does common salt help in separating soap from the solution after saponification?$?

Paper is manufactured by$?

Electric bulb filament is made of$?

Which of the following metals forms an amalgam with other metals?$?

Which of the gas is not known as green house gas?$?

Which of the following is used as a lubricant?$?

The average salinity of sea water is$?

Heavy water is:$?

Carbon, diamond and graphite are together called:$?

Most soluble in water is:$?

From which mineral is radium obtained?$?

Wood is the main raw material for the manufacture of$?

What is the wavelength of visible spectrum?$?

The dark lines in the solar spectrum are due to$?

Nuclear fission is caused by the impact of:$?

Which of the following is commonly called a 'poly-amide'?$?

One Joule is equal to$?

Knot is a unit of speed of which of the following?$?

Isotopes are separated by:$?

One Joule is equal to?

Paper is manufactured by?

How does common salt help in separating soap from the solution after saponification??

Which layer protects earth from harmful rays of the Sun??

What cause a moving body to resist a change in its state of motion??

Which of the following is commonly called a 'poly-amide'??

Nuclear fission is caused by the impact of:?

Wood is the main raw material for the manufacture of?

Isotopes are separated by:?

Knot is a unit of speed of which of the following??

The dark lines in the solar spectrum are due to?

What is the wavelength of visible spectrum??

Electric bulb filament is made of?

Very small time intervals are accurately measure by?

Most soluble in water is:?

From which mineral is radium obtained??

Heavy water is:?

Carbon, diamond and graphite are together called:?

Which of the following is used as a lubricant??