Join WhatsApp ChannelDaily MCQs & Exam Updates

NTS MCQs

National Testing Service — Complete MCQ Bank

1,084 Questions
Exam Preparation Guide

How to prepare for NTS

NTS tests evaluate aptitude, analytical reasoning, quantitative ability, English and subject knowledge for admissions, scholarships and recruitment.

EnglishQuantitative SkillsAnalytical ReasoningSubject Knowledge
Practice under a timer and review weak areas after every test to improve both speed and accuracy.
NTS preparation illustration
381

Which common acid is found in citrus fruits like lemons and oranges giving them a sour taste?

  • AAcetic acid
  • BSulfuric acid
  • CCitric acid
  • DFormic acid
Permalink
Correct Answer: Option C — Citric acid
Explanation: Citric acid is the naturally occurring organic acid found abundantly in citrus fruits such as lemons limes and oranges responsible for their distinctive sour or tart taste.
Submitted by: PaperMCQs
382

Which common household acid is found in vinegar and gives it its sour taste and smell?

  • ASulfuric acid
  • BAcetic acid
  • CHydrochloric acid
  • DCitric acid
Permalink
Correct Answer: Option B — Acetic acid
Explanation: Acetic acid also known as ethanoic acid is the organic acid present in vinegar typically at a concentration of 4 to 8 percent giving it its characteristic sour taste.
Submitted by: PaperMCQs
383

Which process in plants involves losing water vapour through stomata helping in cooling and nutrient transport?

  • ATranspiration
  • BPhotosynthesis
  • CRespiration
  • DOsmosis
Permalink
Correct Answer: Option A — Transpiration
Explanation: Transpiration is the loss of water vapour from plant leaves through stomata which creates a suction force that helps pull water and nutrients up from the roots.
Submitted by: PaperMCQs
384

Which part of the plant transports water and minerals from roots to leaves and food from leaves downward?

  • ARoot only
  • BLeaf only
  • CStem through xylem and phloem
  • DFlower only
Permalink
Correct Answer: Option C — Stem through xylem and phloem
Explanation: The stem contains xylem vessels that transport water and minerals upward from roots and phloem vessels that carry glucose produced during photosynthesis downward to other parts.
Submitted by: PaperMCQs
385

Which part of the plant conducts photosynthesis and contains stomata for gas exchange?

  • ARoot
  • BStem
  • CFlower
  • DLeaf
Permalink
Correct Answer: Option D — Leaf
Explanation: Leaves are the primary site of photosynthesis containing chlorophyll and stomata which allow carbon dioxide in and oxygen and water vapour out during gas exchange.
Submitted by: PaperMCQs
386

Which part of the plant is responsible for anchoring it in soil and absorbing water and minerals?

  • AStem
  • BLeaf
  • CFlower
  • DRoot
Permalink
Correct Answer: Option D — Root
Explanation: Roots anchor the plant in soil and absorb water and dissolved minerals through tiny root hair cells transporting these essential resources up through the stem to the rest of the plant.
Submitted by: PaperMCQs
387

Which everyday item uses a bimetallic strip that bends when heated to control temperature in older thermostats?

  • AThermostat
  • BCompass
  • CHygrometer
  • DBarometer
Permalink
Correct Answer: Option A — Thermostat
Explanation: Older thermostats use a bimetallic strip that bends when heated because two bonded metals expand at different rates triggering a circuit to switch heating or cooling on and off.
Submitted by: PaperMCQs
388

Which part of the water cycle involves water falling from clouds back to the Earth's surface as rain snow or hail?

  • AEvaporation
  • BPrecipitation
  • CCondensation
  • DTranspiration
Permalink
Correct Answer: Option B — Precipitation
Explanation: Precipitation is the stage of the water cycle where water falls from clouds back to the Earth's surface in various forms including rain snow sleet and hail.
Submitted by: PaperMCQs
389

Which part of the water cycle involves water vapour cooling and turning back into liquid water droplets to form clouds?

  • AEvaporation
  • BCondensation
  • CPrecipitation
  • DTranspiration
Permalink
Correct Answer: Option B — Condensation
Explanation: Condensation is the part of the water cycle where water vapour cools as it rises and turns back into tiny liquid droplets forming clouds and fog in the atmosphere.
Submitted by: PaperMCQs
390

Which process in the water cycle involves the sun's energy turning liquid water into water vapour?

  • ACondensation
  • BPrecipitation
  • CEvaporation
  • DInfiltration
Permalink
Correct Answer: Option C — Evaporation
Explanation: Evaporation is the process in the water cycle where solar energy heats water in oceans lakes and rivers turning liquid water into water vapour that rises into the atmosphere.
Submitted by: PaperMCQs