NVS Lab Attendant Mock Test - 7 - NVS TGT/PGT MCQ

As the foot of the 'Horse' is called 'Hoof' in the same way the foot of the 'Eagle' is called 'Claw'.

Checking Statement I:
Using statement I, we do not get any relation between car and cycle.
Therefore, the conclusion cannot be derived using statement I alone.
Checking Statement II:
Using statement II, we do not get any relation between car and cycle.
Therefore, the conclusion cannot be derived using statement II alone.
Checking both statements I and II:
Using both statements I and II, we get the following diagram:

Since some cycles are trains and no train is buses and all cars are buses, therefore, some cycles are not cars is definitely true.
Since the required conclusion can be derived by using statements I and II together.
Hence, Option D is correct.

The numeric value of the letters (considering A to be 1 and Z to be 26) is added and simplified to obtain a single digit.

For RAM, the numeric value of R, A and M is 18, 1 and 13 respectively. Their sum is 32, Now 32 is further simplified to obtain a single digit by adding 3 and 2, which gives us 5 as the final value.
Similarly for GUI, the numeric value of G,U and I is 7, 21 and 9 respectively. Their sum is 37, which is simplified as 3 + 7 = 10 => 1 + 0 = 1.
Similar process will be done to obtain the code for SAP, the numeric value of S, A and P is 19, 1 and 16 respectively. Their sum is 36, which is simplified as 3 + 6 = 9.
So, the code for SAP is 9.
Hence option (B) is correct.

Mohan Yadav has been officially announced as the chief minister-elect for Madhya Pradesh by the Bharatiya Janata Party (BJP).

The Indian Space Research Organisation (ISRO) is set to launch the European Space Agency's (ESA) Solar Study Mission Proba-3, highlighting ISRO's role as a key player in international space collaborations and missions.

The correct transformation of the sentence from active to passive voice is:

"You should not offer meat to vegetarians."

The transformed sentence in passive voice is: "Vegetarians should not be offered meat."

Therefore, the correct answer is option C: "Vegetarians should not be offered meat."

Covert means not openly acknowledged or displayed

Synonyms: secret, furtive, clandestine, surreptitious, stealthy

We cannot win in Afghanistan while Pakistan gives covert support to the Taliban
The climax of the book, a covert operation in Iran, is flaccid and unconvincing
Legally, it will be a deniable covert action which will put the CIA in the lead

Polygyny: polygamy in which a man has more than one wife.
Polyphony: the style of simultaneously combining a number of parts, each forming an individual melody and harmonizing with each other.
Polyandry: polygamy in which a woman has more than one husband.
Polychromy: the art of painting in several colours, especially as applied to ancient pottery, sculpture, and architecture.

सही उत्तर है - ‘ढूँढ-ढाँढ’।

• ‘ढूँढ-ढाँढ’ समोच्चरित भिन्नार्थक शब्द-युग्म नहीं है।
• ढूँढ का अर्थ : खोज, तलाश।
• अन्य सभी समोच्चरित भिन्नार्थक शब्द हैं।

Key Pointsअन्य विकल्प :

• कटिबद्ध- तैयार या तत्पर।
• कटिबंध- कमरबंद, कमर पर बाँधा जाने वाला आभूषण।
• करकट- कूड़ा कचरा।
• कर्कट- केकड़ा।
• क्रांति- विद्रोह।
• क्लांति- थकावट।

Additional Information

• समोच्चरित भिन्नार्थक शब्द - वे बोलचाल में लगभग एक जैसे लगते हैं, परन्तु उनके अर्थ में भिन्नता होती है। ऐसे शब्द ‘समोच्चरित भिन्नार्थक शब्द’ कहलाते हैं।
  जैसे- घन और धन दोनों के उच्चारण में कोई खास अन्तर महसूस नहीं होता परन्तु अर्थ में भिन्नता है।

अन्य उदाहरण :

• अवधि - अवधी
• ग्रह - गृह
• जलद - जलज
• निश्छल - निश्चल

'वह ग्रंथ हिंदी लिपि में है।' वाक्य ग़लत है।

• अशुद्ध वाक्य - वह ग्रंथ हिंदी लिपि में है।
• शुद्ध वाक्य - वह ग्रंथ देवनागरी लिपि में है।
• हिंदी कोई लिपि नहीं है वह एक भाषा है।
• हिंदी भाषा की लिपि देवनागरी है।

Key Pointsअन्य विकल्पों में कोई त्रुटि नहीं है -

• अध्यक्ष महोदय मुस्कुराने लगे।
• ईश्वर आपका भला करें।
• ओह! तुम कल जाओगे।

Additional Informationदेवनागरी लिपि की विशेषताएँ -

• देवनागरी लिपि के उच्चारण और प्रयोग में समानता होती है।
• देवनागरी लिपि पूर्णतया वैज्ञानिक है।
• देवनागरी में निश्चित मात्राएँ हैं।
• इसमें प्रत्येक ध्वनि के लिए अलग लिपि चिह्न है।
• इसमें वर्ण का कोई भ्रम नहीं है।
• प्रत्येक वर्ग में अघोष फिर सघोष वर्ण हैं।
• यह लिपि लिखाई और छपाई दोनों में समान है।

दिए गए वाक्य का काल है - 'सामान्य भूतकाल'

• दिये गए वाक्य "आधुनिक युग की मीरा महादेवी वर्मा ने 'मेरा परिवार' नामक संस्‍मरण लिखा।" में भूतकाल का प्रयोग हुआ है। यह वाक्य बताता है कि कार्य पूर्णतः समाप्त हो चुका है, जिसके आधार पर इसे "सामान्य भूतकाल" में माना जा सकता है।

Key Points

सही उत्तर है - "तिरोभाव" l
Key Points

• 'आविर्भाव’ का उपयुक्त विलोम शब्द है - 'तिरोभाव' l
  • आविर्भाव शब्द का अर्थ है - प्रकट होना l
  • तिरोभाव शब्द का अर्थ है - अदृश्य हो जाना, अदर्शन।
  • अन्य विकल्प :- प्रकटीकरण, उद्वेलन, समभाव - 'आविर्भाव' शब्द के उचित विलोम शब्द नहीं है l

Additional Information

• जो शब्द एक दूसरे के विपरीतार्थक हो, या उल्टा अर्थ बताते हैं, विलोम शब्द कहलाते हैं l
  • उदाहरण :- अच्छा – बुरा अंकुश – निरंकुश अकाल – सुकाल

Organisms look similar because their body designs are similar. If body designs are to be similar , the blueprints for these designs should be similar.

A current carrying solenoid produces a uniform magnetic field inside it.

Here, ∠i = 60°, ∠r = 45°
Using Snell’s law of refraction, refractive index of medium B with respect to medium A.

Sublimation is the process where a solid transitions directly into a gas without passing through the liquid phase. Let's evaluate each option:

• a) Ammonium chloride: Ammonium chloride (NH₄Cl) undergoes sublimation. When heated, it decomposes into ammonia (NH₃) and hydrogen chloride (HCl) gases, which can recombine into a solid upon cooling. Undergoes sublimation.
• b) Sodium chloride: Sodium chloride (NaCl), or common salt, does not undergo sublimation. It has a very high melting point (around 801°C) and boiling point (1413°C), and when heated, it melts into a liquid before vaporizing. Does not undergo sublimation.
• c) Solid carbon dioxide: Solid carbon dioxide (CO₂), also known as dry ice, sublimates at -78.5°C under standard pressure, turning directly into CO₂ gas without melting. Undergoes sublimation.
• d) Iodine: Iodine (I₂) sublimates when heated. At room temperature, it can slowly sublime, and when heated gently, it turns directly into a purple vapor without melting. Undergoes sublimation.

Conclusion: Among the options, b) Sodium chloride does not undergo sublimation, as it melts into a liquid before vaporizing, unlike the others which transition directly from solid to gas.

The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. It's exact value is defined as 299 792 458 metres per second ( or approximately, 3*10⁸ m/s)

At room temperature, Bromine is present in liquid state. Bromine is a non-metal belonging to family of halogens.

They have similar chemical properties because isotopes of an element have the same number of electrons as an atom of that element. The electron arrangement is the same owing to same chemical properties. However they have different numbers of neutrons, which affects the mass number. Mass number determines the physical properties such as boiling/melting/density etc

X-rays, light rays are electrostatic waves. These waves do not require material medium for its propagation.

Option 2 is correct.

• Carbon monoxide (CO) is one of the most serious air pollutants, highly poisonous to living beings because of its ability to block the delivery of oxygen to the organs and tissues.
• It binds to haemoglobin to form carboxyhemoglobin, which is about 300 times more stable than the oxygen-haemoglobin complex.
• In blood, when the concentration of carboxyhemoglobin reaches about 3–4 per cent, the oxygen-carrying capacity of blood is greatly reduced.
• This oxygen deficiency results in headache, weak eyesight, nervousness and cardiovascular disorder.

The correct answer is Biomagnification.

• Biomagnification is the concentration of a toxin at successively higher levels in a food chain. 

Key Points

• Biomagnification is the trophic enrichment of contaminants within food webs and progressive increase in chemical concentrations with increasing animal trophic status.
• Biomagnification occurs when organisms like zooplankton feed upon the contaminated phytoplankton and in turn absorb Persistent Organic Pollutants (DDT) into their own tissues at a higher concentration.
• The more contaminated phytoplankton zooplankton eats, the more will be the contamination at upper trophic levels.

Lead is a metal but it is a poor conductor of heat because it contain some particles which does not allows heat to pass through it .

Concept:

Energy:

• Energy is the capacity or ability to perform work.
• It could exist in several different forms, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc.

Energy crisis:

• Any significant disruption in the supply of energy resources in an economy is considered an energy crisis.

Explanation:

Alternative energy:

• Alternative energy comes from sources other than fossil fuels, and as a result, it emits little or no greenhouse emissions like carbon dioxide (CO2).
• This indicates that energy is generated from several sources.
• Examples of alternative energy are solar power, wind power, hydropower etc.
• The wisest course of action to solve the energy crisis is to reduce global reliance on non-renewable resources while enhancing the use of alternative energy.

Thus, the solution to energy crises is alternative energy.

Additional Information Hydroelectric energy:

• This source of energy is the kinetic energy of flowing water or the potential energy of water at a height.
• Hydropower plants convert the potential energy of falling water into electricity.

Petroleum:

• Petroleum is a dark oily liquid.
• It has an unpleasant odour.
• It is a mixture of various constituents such as petroleum gas, petrol, diesel, lubricating oil, paraffin wax, etc.

Coal:

• Coal is one of the fuels used to cook food.
• Earlier, it was used in railway engines to produce steam to run the engine.
• It is also used in thermal power plants to produce electricity. 

The human eye forms the image of an object at its Retina.
The retina is a light-sensitive layer of tissue located at the back of the eye. It contains specialized cells called photoreceptors that convert light into electrical signals. These signals are then transmitted to the brain via the optic nerve, where they are interpreted as visual images.
Explanation:
- The retina is responsible for capturing the image of an object and converting it into electrical signals.
- It is composed of multiple layers, including the outermost layer called the pigmented epithelium, which absorbs excess light and provides nourishment to the photoreceptor cells.
- The innermost layer of the retina contains the photoreceptor cells, namely rods and cones. Rods are responsible for detecting dim light and are more sensitive to motion, while cones are responsible for color vision and detailed visual acuity.
- When light enters the eye, it passes through the cornea, the transparent outer covering of the eye, and the lens, which focuses the light onto the retina.
- The lens adjusts its shape to allow for accommodation, which is the process of focusing on objects at different distances.
- The light that reaches the retina stimulates the photoreceptor cells, which then send electrical signals to the brain via the optic nerve.
- The brain processes these signals and interprets them as visual images, allowing us to perceive the world around us.
In conclusion, the retina is the part of the eye where the image of an object is formed. It plays a crucial role in the process of vision by converting light into electrical signals that the brain can interpret.

Separating Cream from Milk using Centrifugation

• Centrifugation: Centrifugation is the process of separating substances of different densities using a centrifuge. In the case of separating cream from milk, centrifugation is a commonly used method.


• Process: When milk is subjected to centrifugation, the heavier components like the cream are forced to the outer edges of the centrifuge tube due to centrifugal force. This allows the cream to be separated from the milk.


• Speed and time: The speed and time of centrifugation can be adjusted to achieve better separation of cream from milk. Higher speeds and longer durations can help in obtaining a more complete separation.


• Collection: Once the centrifugation process is complete, the separated cream can be collected from the top of the tube, while the skimmed milk remains at the bottom.


• Importance: Centrifugation is a quick and efficient method for separating cream from milk without the need for complex equipment or chemicals.

Male produces two types of sperms 50% sperms have X chromosome and rest 50% have Y chromosome. If sperm having X chromosome fertilises ovum the sex of child will be female and in case sperm having Y chromosome fertilises the egg the child will be male.

The correct option is D.
An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height. An object possesses elastic potential energy if it is at a position on an elastic medium other than the equilibrium position.