General Knowledge

Which chemicals is used as washing soda

• GC Metals Non-Metals

Which one among the following chemicals is used as washing soda?

1. Calcium carbonate
2. Calcium bicarbonate
3. Sodium carbonate
4. Sodium bicarbonate

Which gases is placed second in respect of abundance in the Earth's atmosphere

• GS Environment

Which one of the following gases is placed second in respect of abundance in the Earth's atmosphere?

1. Oxygen
2. Hydrogen
3. Nitrogen
4. Carbon dioxide

Zinc is used to protect iron from corrosion because

• GC Acids Bases Salts
• GC Metals Non-Metals

Zinc is used to protect iron from corrosion because zinc is

1. more electropositive than iron
2. cheaper than iron
3. a bluish white metal
4. a good conductor of heat and electricity

How much CO2 is produced on heating of 1 kg of carbon

• GC Atomic Structure

How much CO₂ is produced on heating of 1 kg of carbon?

1. 11/3 kg 
2. 3/11 kg
3. 4/3 kg
4. 3/4 kg

Which waves carries the maximum energy per photon

• GP Sound Waves

Which one among the following waves carries the maximum energy per photon?

1. X-rays
2. Radio waves
3. Light waves
4. Microwaves

Step-up transformers are used for

• GP Magnetism

Step-up transformers are used for

1. increasing electrical power
2. decreasing electrical power
3. decreasing voltage
4. increasing voltage

If some object is weighed when submerged in water

• GP Solids Fluids

If some object is weighed when submerged in water, what will happen to its weight compared to its weight in air?

1. Increase
2. Decrease
3. Remain exactly the same
4. Increase or decrease cannot be predicted

Concave mirror is used in headlights of vehicles, because it

• GP Light

Concave mirror is used in headlights of vehicles, because it

1. focuses light from the bulb onto nearby vehicles
2. sends parallel rays
3. fits well into the shape of the headlight
4. is cheaper than other mirrors

Water boils at a lower temperature at high altitudes, because

• GS Water

Water boils at a lower temperature at high altitudes, because

1. the air pressure is less
2. outside temperature is less
3. less latent heat is less
4. None of the above

Which microbes causes acidification and curdling of milk

• GB Living Organisms

Which one of the following microbes causes acidification and curdling of milk?

1. Lactic Acid Bacillus
2. Clostridium botulinum
3. Vibrio cholerae
4. Saccharomyces cerevisiae

The term 'Probiotic' is applied to

• GB Health

The term 'Probiotic' is applied to

1. Organic food
2. Antacid
3. Antibiotic
4. Live microbial food supplement

Which statements about magnetite ore of iron are correct?

• GC Metals Non-Metals

Which of the following statements about magnetite ore of iron is/are correct?

1. It is known as black ore.
2. It contains 60% to 70% of pure iron.
3. It possesses magnetic properties.

Select the correct answer using the codes given below:

1. 1 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

The compound C6H12O4 contains

• GC Atomic Structure

The compound C₆H₁₂O₄ contains

1. 22 atoms per mole
2. twice the mass percent of H as compared to the mass percent of C
3. six times the mass percent of C as compared to the mass percent of H
4. thrice the mass percent of H as compared to the mass percent of 0

When pure water boils vigorously, the bubbles that rise

• GS Water

When pure water boils vigorously, the bubbles that rise to the surface are composed primarily of

1. air
2. hydrogen
3. hydrogen and oxygen
4. water vapour

The ionization energy of hydrogen atom in the ground state is

• GC Atomic Structure

The ionization energy of hydrogen atom in the ground state is

1. 13.6 MeV
2. 13.6 eV
3. 13.6 Joule
4. Zero

Which waves is used for detecting forgery in currency notes

• GP Sound Waves

Which one of the following waves is used for detecting forgery in currency notes?

1. Ultraviolet waves
2. Infrared waves
3. Radio waves
4. Microwaves

The mirrors used as rear-view mirrors in vehicles are

• GP Light

The mirrors used as rear-view mirrors in vehicles are

1. concave
2. convex
3. cylindrical
4. plane

How long does light take to reach the Earth from the Sun

• GP Light

How long does light take to reach the Earth from the Sun?

1. About 4 minutes
2. About 8 minutes
3. About 24 minutes
4. About 24 hours

Electron emission from a metallic surface by application of light

• GC Atomic Structure

Electron emission from a metallic surface by application of light is known as

1. Thermionic emission
2. Photoelectric emission
3. High field emission
4. Autoelectronic emission

In a vacuum, a five-rupee coin, a feather of a sparrow bird and a mango are dropped

• GP Motion Force

In a vacuum, a five-rupee coin, a feather of a sparrow bird and a mango are dropped simultaneously from the same height. The time taken by them to reach the bottom is t₁, t₂ and t₃ respectively. In this situation, we will observe that

1. t₁ > t₂ > t₃
2. t₁ > t₃ > t₂
3. t₃ > t₁ > t₂
4. t₁ = t₂ = t₃

The force acting on a particle of mass m moving along the x-axis

• GP Work Energy

The force acting on a particle of mass m moving along the x-axis is given by F(x) = Ax² - Bx. Which one of the following is the potential energy of the particle?

1. 2Ax - B
2. -x²/6 (2Ax - 3B)
3. Ax³ - Bx²
4. Zero

An object moves in a circular path with a constant speed

• GP Motion Force

An object moves in a circular path with a constant speed. Which one of the following statements is correct?

1. The centripetal acceleration of the object is smaller for a gentle curve (i.e., curve of larger radius) than that for a sharp curve (i.e., curve of smaller radius).
2. The centripetal acceleration is greater for a gentle curve than that for a sharp curve.
3. The centripetal acceleration is the same for both, the gentle and sharp curves.
4. The centripetal acceleration causes the object to slow down.

Golden rice is a genetically-modified crop plant where the incorporated gene

• GB Reproduction Heredity

Golden rice is a genetically-modified crop plant where the incorporated gene is meant for biosynthesis of

1. Omega-3 fatty acids
2. Vitamin A
3. Vitamin B
4. Vitamin C

Which is the scientific name of the causal organism of elephantiasis

• GB Living Organisms
• GB Health

Which one of the following is the scientific name of the causal organism of elephantiasis?

1. Ascaris lumbricoides
2. Culex pipiens
3. Wuchereria bancrofti
4. Fasciola hepatica

Which elements is used as a timekeeper in atomic clocks

• GC Metals Non-Metals

Which one of the following elements is used as a timekeeper in atomic clocks?

1. Potassium
2. Caesium
3. Calcium
4. Magnesium

Which elements is involved in the control of water content of the blood

• GC Metals Non-Metals

Which one of the following elements is involved in the control of water content of the blood?

1. Potassium
2. Lithium
3. Rubidium
4. Caesium

Which gases dissolves in water to give acidic solution

• GC Metals Non-Metals

Which one of the following gases dissolves in water to give acidic solution?

1. Carbon dioxide
2. Oxygen
3. Nitrogen
4. Hydrogen

Which elements is essential for the formation of chlorophyll

• GC Metals Non-Metals

Which one of the following elements is essential for the formation of chlorophyll in green plants?

1. Calcium
2. Iron
3. Magnesium
4. Potassium

Why is argon gas used along with tungsten wire in an electric bulb

• GC Metals Non-Metals

Why is argon gas used along with tungsten wire in an electric bulb?

1. To increase the life of the bulb
2. To reduce the consumption of electricity
3. To make the emitted light colored
4. To reduce the cost of the bulb

Which is the correct relation between the Kelvin temperature

• GP Heat

Which one of the following is the correct relation between the Kelvin temperature (T) and the Celsius temperature (t_c)?

1. These are two independent temperature scales
2. T = t_c
3. T = t_c - 273.15
4. T = t_c + 273.15

Sound waves cannot travel through a

• GP Sound Waves

Sound waves cannot travel through a

1. copper wire placed in air
2. silver slab placed in air
3. glass prism placed in water
4. wooden hollow pipe placed in vacuum

Certain bills cannot be introduced or proceeded with unless

• Legislature

Certain bills cannot be introduced or proceeded with unless the recommendation of the President is received. However, no recommendation is required in some other cases. In which one of the following cases such recommendation is not required?

1. For introduction of bills and for moving amendments related to financial matters
2. For introduction of a bill or moving of an amendment affecting taxation in which states are interested
3. For introduction of a bill relating to formation of new states or of alteration of areas of existing states
4. For moving of an amendment making provision for the reduction or abolition of any tax

The Jainas believe that Jainism is the outcome

• Ancient History

The Jainas believe that Jainism is the outcome of the teachings of twenty four Tirthankaras. In the light of this statement which one among the following is correct of Vardhamana Mahavira?

1. He was the first Tirthankara and the founder of Jainism
2. He was the twenty third Tirthankara, the first twenty two Trithankaras being considered legendary
3. He was the last and twenty fourth Tirthankara, who was not considered as the founder of the new faith but as a reformer of the existing religious sect
4. He was no one of the twenty four Tirthankaras