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NVS Lab Attendant Mock Test - 9 - NVS TGT/PGT MCQ


Test Description

30 Questions MCQ Test NVS Lab Attendant Exam Mock Test Series 2025 - NVS Lab Attendant Mock Test - 9

NVS Lab Attendant Mock Test - 9 for NVS TGT/PGT 2024 is part of NVS Lab Attendant Exam Mock Test Series 2025 preparation. The NVS Lab Attendant Mock Test - 9 questions and answers have been prepared according to the NVS TGT/PGT exam syllabus.The NVS Lab Attendant Mock Test - 9 MCQs are made for NVS TGT/PGT 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for NVS Lab Attendant Mock Test - 9 below.
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NVS Lab Attendant Mock Test - 9 - Question 1

Seven persons from T to Z are sitting in a linear row facing towards north. Who is sitting at the right end?

Statement I : Y is second to the left of W, who is on the immediate right of Z. X is third to the left of T, who is an immediate neighbor of Y.
Statement II : Z is on the immediate right of Y and doesn't sit at extreme end. U, who does not sit at an extreme end is third to the left of Y. T is third to the left of W.

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 1

Checking Statement I:

Using the above references, we get the following arrangement:


Clearly, W is sitting at the right end.

Hence data in statement I is sufficient to answer the question.

Checking Statement II:

Using the above references, we get the following different arrangement:


Thus we cannot find the final conclusion.

Hence data in statement II is not sufficient to answer the question.

Hence, Option A is correct.
 

NVS Lab Attendant Mock Test - 9 - Question 2

Directions to Solve

In each of the following questions find out the alternative which will replace the question mark.

Question -

144 : 10 :: 169 : ?

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 2

Sure, let's find the correct answer for the given problem.

144 : 10 :: 169 : ?

- 144 is a perfect square (12²) and its square root is 12.
- 12 is then reduced to 10 by subtracting 2 (12 - 2 = 10).
- Similarly, 169 is a perfect square (13²) and its square root is 13.
- Following the same pattern, subtract 2 from 13 (13 - 2 = 11).

Thus, the correct answer is:

B: 11

- 169 : 11

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NVS Lab Attendant Mock Test - 9 - Question 3

Recently, the Kala Ghoda Arts Festival 2023 was held in which of the following cities?

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 3

The correct answer is Mumbai

Key Points

​Kala Ghoda

  • Kala Ghoda is a famous art festival celebrated in Maharashtra State.
  • It is Mumbai's famous street art festival.
  • In the city of Mumbai, a plethora of famous festivals is held. One of them is the Kala Ghoda Arts Festival.
  • The first time, this festival was celebrated was in 1999, and the festival has become, one of the largest ethnic and multicultural festivals in the city.

Additional InformationOther state festivals

NVS Lab Attendant Mock Test - 9 - Question 4
Who among the following has been conferred with the prestigious Dr Kalam Seva Puraskar in November 2022?
Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 4

The correct answer is Ravi Kumar Sagar.

Key Points

  • Ravi Kumar Sagar, one of the youngest founders and CEO of RK'S INNO group was conferred with Dr. Abdul Kalam Seva Puraskar on 22 November 2022.
  • He was awarded for his persistent service to society and is one of the youngest entrepreneurs in India.
  • This award is hosted every year by Vandhe Bharat Foundation to commemorate the birth anniversary of Dr. APJ Adul Kalam.

Important Points

  • The award is conferred to the deserving candidates on the birth anniversary of Dr. Kalam for recognizing various people who have been doing extraordinary work for society.
  • Ravi Kumar Sagar is also the Author of the book "YUVATHA VYAPARAM" (YOUTH BUSINESS).
  • He is also the Founder of Achieve Entrepreneurs Academy.
NVS Lab Attendant Mock Test - 9 - Question 5

Where was the 44th All India Criminology Conference of the National Forensic Science University (NFSU) held?

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 5

Union Home Minister Amit Shah addressed the 5th International and 44th All India Criminology Conference at the National Forensic Science University in Gandhinagar, Gujarat. The conference focused on Forensic Behavioural Science, an emerging field highlighted by Shah. Emphasizing the role of Behavioral Science in crime prevention, he inaugurated a Digital Forensic Excellence Centre for capacity building and investigations, underscoring its importance alongside a robust administration and judiciary.

NVS Lab Attendant Mock Test - 9 - Question 6

Who among the following is a current non-permanent member of the UN Security Council?

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 6

The correct answer is None of the above

  • The five newly elected countries will join Ecuador, Japan, Malta, Mozambique, and Switzerland as non-permanent members of the Council. They will take up seats currently occupied by Albania, Brazil, Gabon, Ghana, and the United Arab Emirates when their two-year terms end on 31 December.

Key Points

  • United Nations Security Council:
    • The United Nations Security Council is one of the six main organs of the UN, and it is primarily responsible for maintaining international peace and security.
    • It consists of 15 members -five permanent members and 10 non-permanent members.
    • The five permanent members are the US, UK, Russia, China, and France.
    • Every year, five non-permanent members are elected for a tenure of two years.
    • To be elected as a non-permanent member of the council, each member country requires a two-thirds majority of the entire assembly.

Additional Information

  • Five permanent members: China, France, the Russian Federation, the United Kingdom, and the United States.
  • Ten non-permanent members elected for two-year terms by the General Assembly (with end of term year):

    Albania (2023)
    Brazil (2023)
    Ecuador (2024)
    Gabon (2023)
    Ghana (2023)
    Japan (2024)
    Malta (2024)
    Mozambique (2024)
    Switzerland (2024)
    United Arab Emirates (2023)

NVS Lab Attendant Mock Test - 9 - Question 7

'अनादर, उपेक्षा, निरादर' के लिए कौन सा अनेकार्थी शब्द सही है चयन कीजिए?

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 7

सही उत्तर 'अपमान' है।
Key Points

  • 'अपमान ' शब्द के अनेकार्थी शब्द - अनादर, उपेक्षा, निरादर।
  • 'अपमान' के अन्य अनेकार्थी शब्द - बेइज्जती, अवज्ञा, तिरस्कार, अवमाना।

​ अन्य विकल्प -

1. अभय- निडर, साहसी, निर्भीक, निर्भय, निश्चिन्त।

2. अभियोग- दोषारोपण, कसूर, अपराध, गलती, आक्षेप, आरोप, दोषारोपण, इल्ज़ामा।

3. अनुपम- सुन्दर, अतुल, अपूर्व, अद्वितीय, अनोखा, अप्रतिम, अद्भुत, अनूठा, विलक्षण, विचित्र।

Additional Information

NVS Lab Attendant Mock Test - 9 - Question 8
निम्नांकित में से कौन-सा 'समुच्चयबोधक शब्द' नहीं है?
Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 8

सही उत्तर "यहाँ" है।

  • दिए गए विकल्पों में, 'यहाँ' शब्द 'समुच्चयबोधक अव्यय' नहीं है।
  • 'यहाँ' शब्द 'क्रिया-विशेषण अव्यय' है।
  • वे शब्द दो या दो से अधिक शब्दों या वाक्यों को जोड़ने का काम करते हैं, वे समुच्चयबोधक शब्द कहलाते हैं।
  • जैसे: और, व, एवं, तथा, या, अथवा, किन्तु, परन्तु, कि, क्योंकि, जो कि, हालाँकि, लेकिन, अत:, इसलिए आदि।

Key Pointsअन्य उदाहरण:

Additional Information

  • वे शब्द जिनमे लिंग, कारक, वचन, पुरुष आदि के कारण कोई विकार/ परिवर्तन उत्पन्न नहीं होता है, अव्यय शब्द कहलाते है।
  • जैसे – आज, कब, इधर, किन्तु आदि।
  • अव्यय के पांच भेद हैं
NVS Lab Attendant Mock Test - 9 - Question 9
इनमें से किस विकल्प के सभी शब्द अव्यय की श्रेणी में आते हैं?
Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 9

सही उत्तर 'अब, एवं, भी' है।

दिए गए विकल्पों में 'अब, एवं, भी' अव्यय की श्रेणी में आते है।

वे शब्द जिनमे लिंग, कारक, वचन, पुरुष आदि के कारण कोई विकार/ परिवर्तन उत्पन्न नहीं होता है, अव्यय शब्द कहलाते है।

जैसे – आज, कब, इधर, किन्तु आदि।

Key Points

अन्य विकल्पों का विश्लेषण:

Additional Information अव्यय के पांच भेद हैं

NVS Lab Attendant Mock Test - 9 - Question 10
निम्नलिखित में से 'एतन्मुरारी' के सही सन्धि विच्छेद का चयन कीजिये।
Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 10

दिए गए विकल्पों में से विकल्प 1 'एतत् + मुरारी' सही सन्धि विच्छेद है।

Key Points

  • एतत् + मुरारी = एतन्मुरारी
  • एतन्मुरारी में व्यंजन संधि है
  • नियम - त् का न में परिवर्तन
  • अन्य विकल्प त्रुटिपूर्ण है

Additional Information

  • जब दो वर्गों में सन्धि होती है। यदि इन दो वर्गों में से पहला वर्ण व्यञ्जन हो और दूसरा वर्ण व्यञ्जन या स्वर हो तो उससे जो विकार उत्पन्न होता है, उसे व्यञ्जन सन्धि कहते हैं। व्यञ्जन सन्धि को संस्कृत में 'हल सन्धि' कहते हैं।
  • नियम - यदि किसी वर्ग के प्रथम वर्ण के बाद कोई अनुनासिक वर्ण हो तो प्रथम वर्ण के बदले उसी वर्ग का अनुनासिक वर्ण हो जाता है।
  • उदाहरण -
  • वाक् + मात्र = वाङ्मात्र; जगत् + नाथ = जगन्नाथ
  • अप् + मय = अम्मय; षट् + मास = षण्मास
  • दिक् + मण्डल = दिमण्डल; वाक् + मय = वाङ्मय
  • एतत् + मुरारी = एतन्मुरारी; चित् + मय = चिन्मय
NVS Lab Attendant Mock Test - 9 - Question 11
निम्नलिखित में से अव्ययीभाव समास कौनसा है-
Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 11

सही विकल्प 4 'भरपेट' है।

Key Points

  • भरपेट में अव्ययीभाव समास का प्रयोग किया गया जिसका अर्थ होता है 'पेट भरकर'
  • अव्ययीभाव समास- जिस समास का प्रथम पद या पूर्व पद अव्यय हो अर्थात जिसमें प्रथम पद प्रधान हो उसे अव्ययीभाव समास कहते हैं।
    • अन्य उदाहरण- प्रतिदिन, यथाशक्ति, यथासंभव यावज्जीवन आदि।
  • अन्य विकल्पः-
    • विद्यालय- का समस विग्रह- विद्या के लिए आलय। इस शब्द में सम्प्रदान तत्पुरुष समास है।
    • मनमाना- का समस विग्रह- 'मन से माना हुआ'। इस शब्द में करण तत्पुरुष समास(से , द्वारा) है।
    • कनफटा- का समस विग्रह- ' कान है फटे हुए जिसके अर्थात् नाथों का एक विशेष संप्रदाए विशेष। इसमें बहुब्रीह समास है।

Additional Information

  • समास- दो या दो से अधिक पदों या शब्दों के संक्षेपीकरण से जो शब्द बनता है, उसे ही समास कहते है।
    • समास में मुख्यता दो पद होते है पहले पद को पूर्व पद एवं दूसरे पद को उत्तर पद कहते है ।
    • समास के मुख्यतः 4 भेद होते है। किन्तु तत्‍पुरुष समास के दो उपभेद भी होते है।
  • अव्ययी भाव समास -जिस समास का प्रथम पद अव्यय हो अर्थात् प्रथम पद प्रधान हो ।
    • जैसे- आजन्म,प्रतिदिन, प्रत्यक्ष आदि।
  • तत्पुरुष समाम - जिस समास का अंतिम पद अर्थात उत्तर पद प्रधान हो उसे तत्पुरुष समाम कहते है।
    • जैसे- चिड़ीमार, गगनचुम्बी आदि।
  • कर्मधारय समाम-जिस समास में विशेषण और विशेष्य का संबंध अथवा उपमेय और उपमान का संबंध पाया जाता है. उसं कर्मधार्य समास कहते है।
    • जैसे- नीलगाय-नीली है जो गाय
  • द्विगु समाम -जिस समास का प्रथम पद संख्यावाची तथा अंतिम पद संज्ञा हो उसे द्विगु समास कहते है। जैसे -नवरत्न
    • समास के अन्य उदाहरण
  • बहुव्रीह समास - कोई पद प्रधान नही।
    • जैसे चतुर्भुज - चार भुजाएँ है जिसकी अर्थात भगवान विष्णु
  • द्वन्‍द्व समास- दोनो पद प्रधान होते है।
    • जैसे माता- पिता

Mistake Pointsतत्‍पुरुष समास के दो उपभेद हैं-

  • कर्मधारय समास
  • द्विगु समास
NVS Lab Attendant Mock Test - 9 - Question 12
निम्नांकित में 'विस्मयादिबोधक शब्द' का उदाहरण है -
Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 12

सही उत्तर "शाबाश" है।

  • दिए गए विकल्पों में, 'शाबाश' शब्द 'विस्मयादिबोधक' अव्यय है।
  • दिए गए जिन शब्दों से शोक, विस्मय, घृणा, आश्चर्य आदि भाव व्यक्त हों, उन्हें विस्मयादि बोधक अव्यय कहा जाता है।
  • जैसे - (शाबाश!) तुमने बहुत अच्छा कार्य किया।
  • इस वाक्य में आश्चर्य के भाव प्रकट हों रहा है और साथ ही इस वाक्य में विस्मयादिबोधक (!) चिह्न का प्रयोग हुआ है इसलिए यहां विस्मयसूचक अव्यय है।

Key Points

अन्य विकल्पों का विश्लेषण:

Additional Information

  • वे शब्द जिनमे लिंग, कारक, वचन, पुरुष आदि के कारण कोई विकार/ परिवर्तन उत्पन्न नहीं होता है, अव्यय शब्द कहलाते है।
  • जैसे – आज, कब, इधर, किन्तु आदि।
  • अव्यय के पांच भेद हैं
NVS Lab Attendant Mock Test - 9 - Question 13
निम्नलिखित में से किस शब्द के निर्माण में उपसर्ग का प्रयोग नहीं हुआ है?
Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 13

सरकारी शब्द के निर्माण में उपसर्ग का प्रयोग नहीं हुआ है
'सरकार + ई = सरकारी' इसमें किसी उपसर्ग का प्रयोग नही हुआ है।Key Points

  • उपसर्ग - वे शब्द जो किसी अन्य शब्द के प्रारंभ में लगकर उसका अर्थ बदल देते है।
  • उदाहरण - हम + दर्दी, खुश + बू, बद + नाम , अध् + खिला आदि।

Additional Information

Mistake Points

  • खुशबू शब्द उर्दू उपसर्ग से निर्मित है
NVS Lab Attendant Mock Test - 9 - Question 14

Directions: In the following question, a sentence is given with a blank. You have to fill the blank with one of the words given as options in order to make the sentence contextually and grammatically correct.

Nobody rules out another surge of the diabolical pathogen, but research and resilience have readied us to _______________ better.

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 14

Let us first learn the meanings of the given words:

Contest (verb): engage in dispute about.

Assuage (verb): make (an unpleasant feeling) less intense.

Lull (verb): calm or send to sleep, typically with soothing sounds or movements.

Mitigate (verb): make (something bad) less severe, serious, or painful.

Appease (verb): assuage or satisfy.

The sentence implies that research and resilience have now empowered us to fight against the spread of virus, thus ‘contest’ and ‘lull’ are contextually weak options. ‘Assuaging’ and 'appeasing' are grammatically inapt as we need a verb in its simple form after 'to'. Thus, only ‘mitigate’ fits here grammatically and contextually.

Hence, option D is correct.

NVS Lab Attendant Mock Test - 9 - Question 15
निम्नलिखित में से कौन सा समानार्थी शब्दों का युग्म सही नहीं है?
Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 15

विकल्प 1, ‘निशापति - दिवाकर यह युग्म सही नहीं है

Key Points

  • "निशापति - दिवाकर" यह युग्म समानार्थी शब्दों को नहीं दर्शाता।
  • निशापति का अर्थ -
    • चंद्रमा; राकेश।
  • दिवाकर का अर्थ -
    • दिनकर, सूर्य।
  • अन्य सभी विकल्प सही सुमेलित हैं। वे सभी चन्द्रमा के समानार्थी शब्द हैं।

Additional Information

  • समानार्थी का अर्थ होता हैं (समान+अर्थ) अर्थात किसी शब्द का समान अर्थ वाले दूसरे शब्द या उसी के सामान कोई दूसरा नाम (वस्तु)। सामान्यत: हिन्दी में एक ही वस्तु के अनेक समान अर्थ वाले शब्द है।
  • जब किसी बात (विचार), वस्तु या भाव का केवल अर्थ बताना हो और उसके अर्थ को बताने के लिए जिस शब्द का प्रयोग करें, वह शब्द समानार्थी शब्द कहलाएगा। जबकि किसी एक ही बात (विचार), वस्तु, भाव को किन-किन नामों से या किन किन शब्दों से जाना जाता है यह पूछा जाए तो बताने के लिए प्रयुक्त शब्दों के समूह में सभी पर्यायवाची होंगे।
    • जैसे:-, 'अश्व' का समानार्थी 'घोड़ा' होगा। इसके विपरीत यदि यहाँ यह कहा जाये कि अश्व को और किन-किन शब्दों से संबोधित किया जाता है तब उत्तर में घोटक, बाजी, हय, तुरंग, दधिका, सैंधव, घोड़ा, रविपुत्र, सर्ता आदि बताए जायेंगे और ये सभी शब्द 'अश्व' के पर्यायवाची होंगे।
NVS Lab Attendant Mock Test - 9 - Question 16

P. E of your body is maximum when you

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 16

Potential Energy of a body = mgh, hence the potential energy is maximum when you are standing, given that acceleration due to gravity and mass remain constant.

NVS Lab Attendant Mock Test - 9 - Question 17
What is the surgical method used in males for contraception, as described in the content?
Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 17
The surgical method used in males for contraception, as mentioned in the content, involves blocking the vas deferens. This procedure is known as vasectomy and prevents the transfer of sperm, thus acting as a method of male sterilization.
NVS Lab Attendant Mock Test - 9 - Question 18

A body moves in a uniform circular motion

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 18
Accelerating objects are objects which are changing their velocity - either the speed (i.e., magnitude of the velocity vector) or the direction. An object undergoing uniform circular motion is moving with a constant speed. Nonetheless, it is accelerating due to its change in direction.
NVS Lab Attendant Mock Test - 9 - Question 19

Living cells were discovered by

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 19

Robert Hooke, a scientist, was the first person to discover the existence of cells with the help of a microscope in 1665 but they were dead cells.

Anton van Leeuwenhoek, in 1674 with the improved microscope, discovered free-living cells of algae Spirogyra in pond water for the first time.

NVS Lab Attendant Mock Test - 9 - Question 20

The melting points of two solids [A] and [B] are 300K and 350K respectively. Which has more inter-particles forces?

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 20

With increase in temperature, inter-particles forces decreases. As the melting point of solid A is less than Solid B. Solid B has more inter-particle forces of attraction. Higher the melting point more the inter-particle force.

NVS Lab Attendant Mock Test - 9 - Question 21

The moon revolves around the earth due to the gravitational force (F) of the earth on the moon. The work done by the gravitational force is (r = radius of the circular orbit of moon):

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 21
  • The work done by the moon when it revolves around the earth is zero because here displacement of the moon and gravitational force of earth are perpendicular to each other.
  • Work done (W) = F x d x cosƟ. In the case of the revolution of the moon around the earth, Ɵ is 90°. Thus, W = F x d x cos90° = F x d x 0 = 0.
  • So, the work done by the moon when it revolves around the earth is Zero.
NVS Lab Attendant Mock Test - 9 - Question 22

A combination of common salt and iron filings is a

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 22

A combination of common salt and Iron filings is a mixture as there is no chemical reaction between them to form new substance.

NVS Lab Attendant Mock Test - 9 - Question 23

1 u or 1 amu means

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 23

1 u (atomic mass unit) or 1 amu is defined as 1/12th of the mass of a carbon-12 atom.

NVS Lab Attendant Mock Test - 9 - Question 24

3 Solutions A, B and C are taken in a test tube. On adding China rose indicator, A turned green, B remained colourlers whereas C turned dark pink in colour.

What is the nature of A, B and C ?

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 24

A turning green with China rose indicator suggests that it is a basic solution. China rose indicator is a pH indicator that changes color in the presence of acidic and basic solutions. In this case, the green color indicates that solution A has a basic nature.

B remaining colorless with China rose indicator suggests that it is a neutral solution. The lack of color change indicates that solution B has a pH value close to 7, which is considered neutral on the pH scale.

C turning dark pink in color with China rose indicator suggests that it is an acidic solution. China rose indicator turns pink or dark pink in the presence of acidic solutions, indicating that solution C has an acidic nature.

NVS Lab Attendant Mock Test - 9 - Question 25

In our country, there are attempts to increase the height of several existing dams like Tehri and Almati dams across Narmada. Choose the correct statements among the following that are a consequence of raising the height of dams.
(i) Terrestrial flora and fauna of the area is destroyed completely.
(ii) Dislocation of people and domestic animals living in the area.
(iii) Valuable agricultural land may be permanently lost.
(iv) It will generate permanent employment for people.

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 25

Statements (i), (ii) and (iii) are correct.

NVS Lab Attendant Mock Test - 9 - Question 26

The vein which brings clean blood from the lungs into the heart is known as:

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 26

The form of veins that transfer oxygenated blood from the lungs to the heart is the pulmonary veins. The four major pulmonary veins, two from each of the lungs that flow into the left atrium of the heart, are the largest pulmonary veins. 

NVS Lab Attendant Mock Test - 9 - Question 27

A concave lens of 20 cm focal length forms an image 15 cm from the lens. What is the object distance ?

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 27

Focal length= -20(as it is concave lens)
v= -15 (as concave lens always forms virtual and erect image on left of lens)
Putting these values in lens formula,
1/ -20 - 1/u = 1/ -15
-1/ u= 1/-15 + 1/20
-1/u = -4+3/60
-1/u = -1/60
-u = -60
[u =60]

NVS Lab Attendant Mock Test - 9 - Question 28
The rain is called as acid rain, when its pH is less than_____.
Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 28

When the quantity of acids in the raining water is more than the average, then such rain is called 'Acid rain'.

We are aware that normally rainwater has a pH of 5.6.  When the pH of the rainwater drops below 5.6, it is called acid rain.

Acid rain refers to the ways in which acid from the atmosphere is deposited on the earth’s surface. Oxides of nitrogen and sulphur which are acidic in nature can be blown by the wind along with solid particles in the atmosphere and finally settle down either on the ground as dry deposition or in water, fog and snow as wet deposition.

∴ The average pH value of the acid rain is 4 to 5 and hence the average value of 4.5.

The bad effects of acid rain

  • When acid rain falls and flows as groundwater to reach rivers, lakes etc, it affects plants and animal life in the aquatic ecosystem
  • Acid rain is harmful to agriculture, trees and plants as it dissolves and washes away nutrients needed for their growth
  • It causes respiratory ailments in human beings and animal
  • It may also cause corrosion in many buildings bridges, monuments, fencing etc
  • It causes irritation in the eyes and skin of human beings
  • This rain reduces the lustre of the metals too
  • Acid rain damages buildings and other structures made of stone or metal
  • The Taj Mahal in India has been affected by acid rain
NVS Lab Attendant Mock Test - 9 - Question 29

SI unit of force is kg ms-2. This unit is also known as:

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 29

Kg ms-2 is also called Newton as unit of force is newton.

Option D is correct.

NVS Lab Attendant Mock Test - 9 - Question 30

A bullet entering a metal block of 30 cm length stops on reaching 25 cm. The energy with the bullet will be lost

Detailed Solution for NVS Lab Attendant Mock Test - 9 - Question 30

To determine where the energy of the bullet is lost, we need to consider the different forms of energy transfer involved.
1. Kinetic Energy: The bullet initially possesses kinetic energy as it moves towards the metal block.
2. Momentum Transfer: When the bullet collides with the metal block, it imparts momentum to the block.
3. Heat Energy: Some of the kinetic energy of the bullet is also converted into heat energy during the collision.
Given that the bullet stops on reaching 25 cm inside the metal block, we can conclude that the bullet loses all its kinetic energy and comes to rest. Therefore, the energy with the bullet is lost in both imparting momentum to the block and in the form of heat. Hence, the correct answer is option C: Both (a) and (b).
To summarize:
- The bullet loses its kinetic energy upon colliding with the metal block.
- The momentum of the bullet is transferred to the block, causing the block to move.
- Some of the kinetic energy is converted into heat energy during the collision.
Note: It is important to note that this solution assumes an idealized scenario where no other external factors, such as friction or air resistance, are present.
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