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PPSC MCQs

Punjab Public Service Commission β€” Complete MCQ Bank

1,262 Questions
Exam Preparation Guide

How to prepare for PPSC

PPSC examinations recruit candidates for Punjab government departments and commonly test general knowledge, current affairs, English and post-related subjects.

Punjab AffairsGeneral KnowledgeCurrent AffairsEnglish
Give special attention to Punjab geography, history and administration alongside the advertised post’s specialist syllabus.
PPSC preparation illustration
531

Which common everyday substance is used to test for the presence of glucose in food and turns brick-red when heated?

  • AIodine solution
  • BBenedict's solution
  • CLitmus paper
  • DUniversal indicator
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Correct Answer: Option B β€” Benedict's solution
Explanation: Benedict's solution is used to test for reducing sugars including glucose and turns from blue to brick-red when heated in the presence of glucose.
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532

Which common everyday substance is used to test for the presence of starch in food by turning blue-black?

  • AIodine solution
  • BLitmus paper
  • CBenedict's solution
  • DBiuret reagent
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Correct Answer: Option A β€” Iodine solution
Explanation: Iodine solution turns blue-black in the presence of starch making it a simple and reliable test for detecting starch in food items during food science investigations.
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533

Which cold-blooded vertebrate group lives entirely in water breathing through gills throughout its life?

  • AFish
  • BAmphibians
  • CReptiles
  • DMammals
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Correct Answer: Option A β€” Fish
Explanation: Fish are cold-blooded aquatic vertebrates that breathe through gills throughout their entire lives extracting dissolved oxygen from water as they swim.
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534

Which warm-blooded animal group nourishes its young with milk and typically gives birth to live young?

  • ABirds
  • BReptiles
  • CAmphibians
  • DMammals
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Correct Answer: Option D β€” Mammals
Explanation: Mammals are warm-blooded vertebrates that nourish their young with milk secreted from mammary glands most give birth to live young and have body hair or fur.
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535

Which cold-blooded animal group is covered in scales breathes air through lungs and lays eggs on land?

  • AAmphibians
  • BReptiles
  • CFish
  • DArthropods
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Correct Answer: Option B β€” Reptiles
Explanation: Reptiles are cold-blooded animals covered in scales that breathe through lungs and typically lay leathery eggs on land including snakes lizards turtles and crocodiles.
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536

Which type of animal can live both on land and in water, such as frogs and toads?

  • AReptiles
  • BMammals
  • CAmphibians
  • DFish
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Correct Answer: Option C β€” Amphibians
Explanation: Amphibians are cold-blooded animals adapted to live both on land and in water breathing through gills as larvae and developing lungs as adults examples include frogs toads and salamanders.
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537

Which animal group lacks a backbone and includes insects worms and molluscs?

  • AVertebrates
  • BAmphibians
  • CReptiles
  • DInvertebrates
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Correct Answer: Option D β€” Invertebrates
Explanation: Invertebrates are animals that lack a backbone representing approximately 97 percent of all animal species including insects worms spiders and molluscs.
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538

Which animal group is characterised by having a backbone or vertebral column?

  • AVertebrates
  • BInvertebrates
  • CArachnids
  • DArthropods
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Correct Answer: Option A β€” Vertebrates
Explanation: Vertebrates are animals characterised by having a backbone or vertebral column and include fish amphibians reptiles birds and mammals.
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539

Which type of joint is found in the skull where bones are fixed together and allow no movement?

  • AFixed joint or suture
  • BBall and socket
  • CHinge joint
  • DGliding joint
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Correct Answer: Option A β€” Fixed joint or suture
Explanation: Fixed joints called sutures are found in the skull where bones are tightly interlocked by fibrous tissue allowing no movement providing protection to the brain.
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540

Which everyday substance when mixed with water forms a solution that conducts electricity?

  • ASugar
  • BTable salt
  • CSand
  • DOil
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Correct Answer: Option B β€” Table salt
Explanation: Table salt sodium chloride dissolves in water and dissociates into positively charged sodium ions and negatively charged chloride ions which allow electric current to flow through the solution.
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