Logic Cause Effect Assertion Reason Competitive Exams
50 questions · IQ Logic and Reasoning
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Question 1 of 50
Statement I: The price of tomatoes shot up in the market. Statement II: Floods destroyed tomato crops in the major growing areas. Which of the following best describes the relationship between the two statements?
ExplanationLost crops reduce supply and raise prices, so the floods (II) are the cause of the price rise (I).
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Question 2 of 50
Statement I: Many roads in the city are damaged. Statement II: Several houses were washed away. Which of the following best describes the relationship between the two statements?
ExplanationA common cause such as floods explains both. Neither is the cause of the other.
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Question 3 of 50
Assertion (A): Camels can survive in deserts for long periods. Reason (R): Camels store water in their humps. Choose the correct option.
ExplanationA is true. R is false: the hump stores fat, not water. Camels survive by conserving water and tolerating dehydration.
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Question 4 of 50
Assertion (A): Quaid-e-Azam Muhammad Ali Jinnah was the first Governor-General of Pakistan. Reason (R): Pakistan came into being on 14 August 1947. Choose the correct option.
ExplanationBoth statements are true, but the date of independence does not explain why Jinnah became Governor-General.
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Question 5 of 50
Assertion (A): Lahore is the capital of Punjab. Reason (R): Karachi is a major port city. Choose the correct option.
ExplanationBoth are true, but the status of Karachi has no bearing on Lahore being the provincial capital.
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Question 6 of 50
Assertion (A): The Indus plains of Pakistan are fertile. Reason (R): Rivers deposit fertile alluvial soil on these plains. Choose the correct option.
ExplanationThe Indus and its tributaries deposit alluvium, which makes the plains fertile. R explains A.
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Question 7 of 50
Assertion (A): The sky appears blue. Reason (R): Blue light is scattered by the atmosphere more than red light. Choose the correct option.
ExplanationShorter blue wavelengths scatter more strongly, which is why the sky looks blue. R correctly explains A.
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Question 8 of 50
Assertion (A): Diamond is the hardest natural substance. Reason (R): Graphite is a form of carbon. Choose the correct option.
ExplanationBoth statements are true, but graphite being carbon does not explain the hardness of diamond.
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Question 9 of 50
Assertion (A): Bats are birds. Reason (R): Bats are the only mammals capable of true flight. Choose the correct option.
ExplanationA is false because bats are mammals, not birds. R is true.
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Question 10 of 50
Assertion (A): The Great Wall of China is in Asia. Reason (R): Beijing is the capital of China. Choose the correct option.
ExplanationBoth are true, but the capital city does not explain the location of the Wall.
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Question 11 of 50
Statement I: A large number of people have shifted to online shopping. Statement II: Many local retail shops have closed down. Which of the following best describes the relationship between the two statements?
ExplanationAs customers move online, shops lose business and close, so II is the effect of I.
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Question 12 of 50
Statement I: There was a prolonged drought in the region. Statement II: Wheat production declined sharply this year. Which of the following best describes the relationship between the two statements?
ExplanationA long drought deprives crops of water, so the fall in wheat production is the effect of the drought.
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Question 13 of 50
Assertion (A): A person standing in a bus falls backwards when the bus starts suddenly. Reason (R): The body tends to stay at rest when the bus starts moving (inertia of rest). Choose the correct option.
ExplanationThe feet move with the bus but the upper body tends to stay at rest, so the person falls backwards. R explains A.
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Question 14 of 50
Assertion (A): Light travels slower than sound. Reason (R): Light travels at about 3 × 10⁸ m/s. Choose the correct option.
ExplanationA is false: light is far faster than sound. R is true.
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Question 15 of 50
Statement I: A cricket match was held in Karachi. Statement II: Prices of mangoes fell in the market. Which of the following best describes the relationship between the two statements?
ExplanationThe two events have no causal link.
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Question 16 of 50
Statement I: The price of gold has gone up. Statement II: A new film was released in the theatres. Which of the following best describes the relationship between the two statements?
ExplanationThere is no connection between a change in gold prices and a film release.
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Question 17 of 50
Statement I: The city council banned loud music after 10 pm. Statement II: Residents have reported fewer complaints about noise. Which of the following best describes the relationship between the two statements?
ExplanationThe ban reduces noise at night, so the drop in complaints is its effect.
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Question 18 of 50
Assertion (A): Oxygen is the most abundant gas in the atmosphere. Reason (R): Nitrogen makes up about 78% of the atmosphere. Choose the correct option.
ExplanationA is false because nitrogen is the most abundant gas, at about 78%. R is true.
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Question 19 of 50
Assertion (A): Water boils at 100°C at sea level. Reason (R): Water is a good solvent. Choose the correct option.
ExplanationBoth are true, but being a good solvent has nothing to do with the boiling point, so R does not explain A.
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Question 20 of 50
Statement I: Stock prices fell sharply. Statement II: The value of the national currency dropped. Which of the following best describes the relationship between the two statements?
ExplanationBoth can result from a common cause such as an economic crisis, so they are effects of the same cause.
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Question 21 of 50
Statement I: Many passengers missed their flights. Statement II: The airport was closed because of dense fog. Which of the following best describes the relationship between the two statements?
ExplanationThe closure caused the missed flights, so II is the cause of I.
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Question 22 of 50
Statement I: The workers have gone on strike. Statement II: The management refused to increase wages. Which of the following best describes the relationship between the two statements?
ExplanationThe refusal led the workers to strike, so II is the cause of I.
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Question 23 of 50
Statement I: Many tourists visited the northern areas this summer. Statement II: The price of cement increased by 5%. Which of the following best describes the relationship between the two statements?
ExplanationThe two statements are unrelated; neither causes the other and no common cause is evident.
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Question 24 of 50
Statement I: A heavy snowfall blocked the mountain roads. Statement II: Supplies to the northern villages were delayed. Which of the following best describes the relationship between the two statements?
ExplanationBlocked roads delay transport, so the delay in supplies is the effect of the snowfall.
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Question 25 of 50
Assertion (A): Mercury is the largest planet of the solar system. Reason (R): Jupiter is the largest planet of the solar system. Choose the correct option.
ExplanationA is false because Jupiter is the largest planet, not Mercury. R is true.
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Question 26 of 50
Statement I: The government opened a new university in Multan. Statement II: Heavy rain is forecast for next week in Karachi. Which of the following best describes the relationship between the two statements?
ExplanationA new university and a weather forecast in another city are unrelated.
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Question 27 of 50
Assertion (A): The Earth revolves around the Sun. Reason (R): The Sun revolves around the Earth. Choose the correct option.
ExplanationA is true. R is false: the Earth goes round the Sun, not the other way round.
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Question 28 of 50
Assertion (A): Sound cannot travel through a vacuum. Reason (R): Sound travels faster in a vacuum than in air. Choose the correct option.
ExplanationA is true because sound needs a medium. R is false: sound cannot travel in a vacuum at all.
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Question 29 of 50
Assertion (A): Mount Everest is the highest peak above sea level. Reason (R): Mount Everest is located in the Karakoram range. Choose the correct option.
ExplanationA is true. R is false: Everest is in the Himalayas. K2, in the Karakoram, is second highest.
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Question 30 of 50
Assertion (A): Iron rusts in moist air. Reason (R): Iron reacts with oxygen and water to form hydrated iron oxide. Choose the correct option.
ExplanationRust is hydrated iron oxide, produced by the reaction of iron with oxygen and water. R explains A.
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Question 31 of 50
Assertion (A): The Pacific Ocean is the smallest ocean. Reason (R): The Pacific Ocean covers about one-third of the Earth's surface. Choose the correct option.
ExplanationA is false because the Pacific is the largest ocean, not the smallest. R is true.
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Question 32 of 50
Assertion (A): Seasons occur on the Earth. Reason (R): The Earth's axis is tilted. Choose the correct option.
ExplanationThe tilt of the axis changes how directly sunlight reaches each hemisphere through the year (together with the Earth's revolution), causing seasons.
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Question 33 of 50
Assertion (A): The Sun rises in the east. Reason (R): The Earth has one natural satellite. Choose the correct option.
ExplanationBoth are true, but the number of natural satellites does not explain the direction of sunrise. The Earth's west-to-east rotation does.
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Question 34 of 50
Statement I: The school's results improved this year. Statement II: The school hired more qualified teachers last year. Which of the following best describes the relationship between the two statements?
ExplanationBetter teaching leads to better results, so II is the cause of I.
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Question 35 of 50
Assertion (A): The Suez Canal connects the Atlantic and the Pacific oceans. Reason (R): The Panama Canal connects the Atlantic and the Pacific oceans. Choose the correct option.
ExplanationA is false: the Suez Canal links the Mediterranean and the Red Sea. R is true.
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Question 36 of 50
Assertion (A): Ice floats on water. Reason (R): Ice is less dense than liquid water. Choose the correct option.
ExplanationIce is about 9% less dense than liquid water, so it floats. R explains A.
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Question 37 of 50
Statement I: Sales of umbrellas increased. Statement II: Many roads were flooded. Which of the following best describes the relationship between the two statements?
ExplanationBoth result from heavy rain. One does not cause the other.
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Question 38 of 50
Statement I: A new mobile phone model was launched. Statement II: The national hockey team won a match. Which of the following best describes the relationship between the two statements?
ExplanationThe two events are completely unrelated.
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Question 39 of 50
Assertion (A): Leaves appear green. Reason (R): Chlorophyll reflects green light. Choose the correct option.
ExplanationChlorophyll absorbs mostly red and blue light and reflects green, so leaves look green.
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Question 40 of 50
Statement I: Hospitals are reporting many cases of heatstroke. Statement II: Sales of cold drinks and ice have risen. Which of the following best describes the relationship between the two statements?
ExplanationBoth are effects of a common cause: a severe heatwave.
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Question 41 of 50
Statement I: The government introduced free education up to matric. Statement II: School enrolment in rural areas increased. Which of the following best describes the relationship between the two statements?
ExplanationFree education removes a cost barrier, so more rural children enrolled. I is the cause of II.
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Question 42 of 50
Statement I: Many students stayed at home. Statement II: Roads in the city were deserted. Which of the following best describes the relationship between the two statements?
ExplanationA common cause such as a curfew or a severe storm keeps both students and traffic off the streets.
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Question 43 of 50
Statement I: The bank announced a lower interest rate on loans. Statement II: More people applied for home loans. Which of the following best describes the relationship between the two statements?
ExplanationCheaper loans attract more applicants, so Statement II is the effect of Statement I.
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Question 44 of 50
Statement I: The number of dengue cases has risen sharply. Statement II: Stagnant rainwater was left uncleared in many areas. Which of the following best describes the relationship between the two statements?
ExplanationStagnant water breeds mosquitoes that spread dengue, so II is the cause of I.
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Question 45 of 50
Statement I: The factory installed modern machinery. Statement II: The factory's output doubled within a year. Which of the following best describes the relationship between the two statements?
ExplanationBetter machinery raises production, so the higher output is the effect.
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Question 46 of 50
Assertion (A): Whales are mammals. Reason (R): Whales lay eggs. Choose the correct option.
ExplanationA is true. R is false because whales give birth to live young and feed them milk.
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Question 47 of 50
Statement I: Many shops in the market remained closed yesterday. Statement II: The traders' association had called a strike. Which of the following best describes the relationship between the two statements?
ExplanationThe strike call explains why shops stayed closed, so II is the cause and I is its effect.
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Question 48 of 50
Statement I: Ali was late for his interview. Statement II: His bus broke down on the way. Which of the following best describes the relationship between the two statements?
ExplanationThe breakdown made him late, so II is the cause and I is the effect.
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Question 49 of 50
Statement I: Wheat prices have risen sharply. Statement II: Many villages remain cut off from the main roads. Which of the following best describes the relationship between the two statements?
ExplanationBoth are effects of a common cause such as severe floods, which damage crops and roads. Neither causes the other.
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Question 50 of 50
Assertion (A): Cotton is a cash crop. Reason (R): Cotton is grown only in cold regions. Choose the correct option.
ExplanationA is true. R is false because cotton needs a warm climate and a long frost-free season.
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