NVS Lab Attendant Mock Test - 6 - NVS TGT/PGT MCQ

Q, R, S, T, U, and V are seated in a straight line facing North.

i) S is second to the right of T.

ii) T is second to the right of Q.

iii) R is to the immediate left of Q

iv) R is to the immediate left of Q and is second to the left of V.

Thus we can see Q is sitting Fourth to the left of S.

Hence, the correct answer is "Option 4".

The correct answer is (i), (iii), and (iv) only.Key Points

• HSRA was founded by Ram Prasad Bismil and other important figures associated with HSRA are Chandrasekhar Azad, Ashfaqulla Khan, Bhagat Singh, Sukhdev Thapar, and Jogesh Chandra Chatterjee, Jatin das, Ajay Ghosh.
• Hindustan Republican Association (HRA) –  renamed in 1928 as the Hindustan Socialist Republican Association (HSRA) –  a revolutionary organization that was set up in 1923.
• Revolutionaries like Chandrashekhar Azad, Bhagat Singh, Rajguru, and Sukhdev were present at the meeting, held at the Feroz Shah Kotla ground in Delhi, during the establishment of the organization

Thus,  the leaders of the Hindustan Socialist Republican Army (HSRA) were  Bhagat Singh, Jatin Das, and Ajoy Ghosh.

Additional Information

• Bhagat Singh was involved in two high-profile plots against British authorities in India that helped galvanize the Indian independence movement. In 1928 he took part in a plot to kill the police chief responsible for the death of influential Indian writer and politician Lala Lajpat Rai.
• Subhas Chandra Bose was an Indian nationalist whose defiance of British authority in India made him a hero among Indians, but his wartime alliances with Nazi Germany and Imperial Japan left a legacy vexed by authoritarianism, anti-Semitism, and military failure.
• Rabindranath Tagore, the Noble laureate gave the title of 'Desh Nayak' to Subhash Chandra Bose in recognition of his service to the nation and its people.
• Jatin Das was an Indian independence activist and revolutionary who worked to make India independent from the British Raj and was a member of the Hindustan Socialist Republican Association. He died in the Lahore Central Jail after a 63-day hunger strike.

The Asian Wrestling Championship 2024 is being held in Bishkek, Kyrgyzstan. In this championship, India's Udit won the silver medal in men's freestyle 57 kg. While Abhimanyu gave India the second medal in 70 kg.  

The correct answer is Meg Lanning.

Key Points

• Meg Lanning won the orange cap at the Women's IPL 2023.
• Delhi Capitals (DC) skipper Meg Lanning (310 runs) is currently the highest run-scorer of WPL.
• Orange Cap is awarded to the batter who scores the maximum number of runs in an IPL/WPL season.

Additional Information

• Harmanpreet Kaur won the award for catch of the season.
• Hayley Matthews was given the purple cap and the most valuable player.
• Nat Sciver-Brunt of Mumbai Indians was awarded the player of the match.

One word substitution is Cynic.
Egoist: a self-centered or selfish person
Fatalist: one who accepts all things and events as inevitable.
Stoic: a person who can endure pain or hardship without showing their feelings or complaining.
Cynic: a person who believes that people are motivated purely by self-interest rather than acting for honourable or unselfish reasons.

Fervent, similar to fever, fervour means showing enthusiasm.

अध्यापिका के बहुवचन रूप का सबसे अच्छा विकल्प अध्यापिकाएँ है।

• अध्यापिकाएँ से अर्थ है कि एक से अधिक अध्यापिका।

Key Pointsवचन :- शब्दों के उस रूप को जो किसी वस्तु के एक अथवा अनेक होने का बोध कराता है, उसे वचन कहते हैं।

वचन के दो भेद हैं -

• Meaning of Stringent: Strict, precise, and exacting.
• Meaning of Dry: free from moisture or liquid; not wet or moist
• Meaning of Strained: showing signs of nervous tension or tiredness
• Meaning of Rigorous: extremely thorough and careful
• Meaning of Shrill: (of a voice or sound) high-pitched and piercing

• Canny: Intelligent and showing good judgement especially in business or politics.
• Stout: Fat
• Handsome: Attractive
• Obstinate: Refusing to change your opinion, behaviour.

So, the answer is clever.

Black soil is also called as Regur soil or black cotton soil.

Black cotton soil:

• It is the third major group of soil in India and forms the top part of the earth's surface, that includes disintegrated rock, humus, inorganic, and organic materials.
• The soil is in black color and is formed by the weathering of igneous rock.
• Most states of India which includes Maharashtra, Madhya Pradesh, Gujarat, Andhra Pradesh and some parts of Tamil Nadu are covered by the black soil.
• Black cotton soil is clayey in nature and is widely used for the purpose of agriculture. It has high water retention capacity as it is deep and impermeable in nature.

The black color of the black soil is due to the presence of aluminum compounds, iron, and humus. Crops such as cotton, pulses, millets, linseed, tobacco, sugarcane, vegetables and citrus fruits are cultivated in the black soil for high productivity.

Additional Information

Bhangar:

• Old alluvial soil composed of lime nodules or Kankar is called Bhangar.
• It has a clayey composition.​

Humus:

• Decayed remains of plants, animal manures and dead animals is called humus.
• It is an essential element in determining the fertility of soil.

• All living organisms need oxygen to live.
• Plants and animals directly take up oxygen from the air.
• Fish, like all other complex life forms, need oxygen to survive.
• They get theirs in the form of oxygen gas dissolved in the water.
• When sewage is dumped in the water body the wastewater in the pond starts to decompose at a rapid rate.
• This decomposition process leads to the depletion of oxygen in the water body.
• When the dissolved oxygen present in the water decreases the fishes die.

Solar energy - Greenhouse effect - Incorrect

• The term ‘Greenhouse effect’ has been derived from a phenomenon that occurs in a greenhouse.
• A greenhouse looks like a small glasshouse and is used for growing plants, especially during winter.
• In a greenhouse, the glass panel lets the light in but does not allow heat to escape.
• Therefore, the greenhouse warms up, very much like inside a car that has been parked in the sun for a few hours. 
• The greenhouse effect is a naturally occurring phenomenon that is responsible for heating of Earth’s surface and atmosphere.
• Solar energy is trapped by the earth atmosphere and radiates slowly so as to cover our earth with a warm blanket.
• This is the natural process of the greenhouse effect on earth to maintain its temperature and makes the earth perfect for life.
• Without the greenhouse effect, the average temperature at the surface of Earth would have been a chilly –18°C rather than the present average of 15°C.
• Carbon dioxide, methane and water vapour are the major greenhouse gases that absorb the infrared radiation from the Earth and re-emit it.
• It is not caused due to solar energy but due to greenhouse gasses.

Thus, the solar energy-greenhouse effect is not the correct pair.

Additional Information

Fossil fuel-burning - Release of CO₂ - Correct

• Carbon dioxide (CO₂) is released into the atmosphere by respiration, the burning of fossil fuels for energy.
• In recent years, their quantities have increased significantly due to the burning of fossil fuels.
• The increased amount of CO₂ in the air is mainly responsible for global warming.

Nuclear power - Radioactive wastes - Correct

• Initially, nuclear energy was hailed as a non-polluting way of generating electricity.
• Later on, it was realised that the use of nuclear energy has very serious inherent problems i.e. the generation of radioactive waste.
• Safe disposal of radioactive wastes is important in nuclear power energy factories.
• Improper disposal of nuclear waste can cause serious physical and biological deformities in living organisms when directly exposed to them. 

Biomass burning - Release of CO₂  - Correct

• Biomass burning means the burning of living or dead vegetation.
• It happens during land cleaning in the agriculture process when crops are out of the field.
• In this process, a high amount of CO₂ is released into the environment.

The solution in which no more solute can be dissolved at the given temperature is called saturated solution.

For example, if we start to dissolve the salt in water by adding small amount of salt at one instance at room temperature then we will find that after sometime the salt added will not be dissolved in water. It has become a saturated solution now.

We know that, if the magnification value is negative sign in the concave mirror, then the image will be real and inverted. Especially, when you come to concave mirror, the images are formed at the left of the mirror. So, it forms real and inverted.

Option 3 : 1 - IV, 2 - I, 3 - II, 4 - III

The correct answer is Sound from musical instruments.

Concept:

• Sound: A sound is a form of mechanical energy that is transmitted through mediums.
  • Example: sound from musical instruments, man's vocal cord, etc.
• Noise is a sound that is unpleasant or is a loud sound and causes a disturbance.
  • Sound from explosions, factories, vehicles, and a mixture of lots of voices is an example of noise.
• Music: The mixture of different frequencies resulted into an ordered sound is called music.
  • The sound from a musical instrument is an example of music.

Explanation:

• Thus the Sound from musical instruments is not an example of noise. So option 4 is correct.

Key Points

Water Harvesting:  

• Water harvesting is a practice to conserve water by collecting rainwater in an organized way.
• The rainwater is not allowed to flow and get wasted but collected in tanks.
• The main purpose however is not the collection but the enhancement of groundwater level.  
• The collected water through tubes is made to recharge groundwater.
• Maintenance of groundwater is long term sustainable structure for water conservation.
• So, water harvesting is used to increase the groundwater level by an organized collection of groundwater.
• So, water harvesting is a method that Increases the groundwater level.
• Water harvesting is an old practice in India and is now considered a more efficient way of water management than dams.  
• People are adopting this method and it is also being encouraged by the administration and government. 

​Thus, the main purpose of rainwater harvesting is to recharge the groundwater table.

When we light an incense stick in one corner of room its fragrance spreads in the whole room because of the process involved DIFFUSION. It is because particles of matter are continuously moving in the air. Its parties vigorously spread and we can smell its fragrance in the whole room.

Key Points

Thus, the correct match is (a) - (iii), (b) - (iv), (c) -(ii), (d) - (i).

The electronic structure of the noble gases is the basis for explaining why they are so unreactive.

• The heat is transferred in form of conduction, convection, and radiation. 
• Radiation is the mode of heat transfer that does not require a medium. It happens through infrared radiation. 
• The infrared radiations are electromagnetic waves having a frequency less than the visible spectrum. 
• The infrared radiation is emitted from every hot body. 
• Earth is heated by infrared radiations of the sun. The radiations are reflected back by the earth which is captured by greenhouse gases. 
• The greenhouse gases absorbers some amount of heat and keeps the earth warm. 

Thus, infrared radiation is trapped on the earth’s surface by the greenhouse effect.

Additional Information

• The major Greenhouse gas is Carbon dioxide followed by methane, water vapor, and nitrous oxide.  
• UV rays have a frequency higher than violet and they help in the formation of Ozone. 
• The wavelength of different electromagnetic waves are given in the below diagram. 

Concept:

Physical Pollution of Water:

• It is essential to regularly assess the physical properties of water quality in order to determine if the water is polluted or not.
• Physical traits can be identified using:
• Taste and Odor:
  • The taste and odour of clean water are always undetectable.
  • Any taste or smell could be an indication of water pollution.
• Colour:
  • Polluted water may be coloured; pure water is colourless.
• Temperature:
  • In natural water systems like lakes and rivers, temperature is a critical physical factor that impacts water quality.
• Turbidity:
  • The opposite of clear, light-unabsorbent water is turbidity.
  • The presence of turbidity in the water could indicate water pollution.
• Particles:
  • If water is filtered to remove suspended solids, the solid that remains in the water can be used to calculate the number of dissolved solids.
  • Dissolved solids in water that exceed 300 mg/l have a negative impact on both industrial and living objects.

Explanation:

pH Value: 

• Taking measurements of elements like pH and dissolved oxygen is necessary to analyse the chemical properties of water:
• The pH scale, which spans from 0 to 14, is used to determine whether water is acidic or alkaline.
• A logarithmic scale is used for measurement.
• Dissolved oxygen is the amount of free, non-compound oxygen that is present in water or other liquids.
• It is a significant aspect in determining water quality because of its effect on the aquatic life present in a body of water.

Thus, pH value is not involved in the physical pollution of water.