UPSC 2001 Prelims – all questions
146 questions · 2001 · answers as per the UPSC key · page 3 of 3
When light waves pass from air to glass, the variables affected are
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When water is heated from 0 °C to 10 °C, its volume
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Consider the following statements: In a nuclear reactor, self-sustained chain reaction is possible, because I. More neutrons are released in each of the fission reactions. II. The neutrons immediately take part in the fission process. III. The fast neutrons are slowed down by Graphite. IV. Every neutron released in the fission reaction initiates further fission.
Which of these statements are correct?
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Match List I with List II
and select the correct answer using the codes given below the Lists:
List I (Characteristic) I. Zero mass II. Fractional charge III. Fractional spin IV. Integral spin
List II (Particle) A) Positron B) Neutrino C) Quark D) Phonon
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Who is the scientist in whose honour the “Chandra” X-ray telescope has been named?
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The mass of a body on Earth is 100 kg (acceleration due to gravity, gₑ = 10 m/s²). If acceleration due to gravity on the Moon = gₑ/6, then the mass of the body on the moon is
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Consider the following statements: A simple pendulum is set into oscillation. Then I. The acceleration is zero when the bob passes through the mean position. II. In each cycle the bob attains a given velocity twice. III. Both acceleration and velocity of the bob are zero when it reaches its extreme position during its oscillation. IV. The amplitude of oscillation of the simple pendulum decreases with time.
Which of these statements are correct?
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Cloudy nights are warmer compared to clear cloudless nights, because clouds
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Which of the following weather conditions is indicated by a sudden fall in barometer reading?
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A radioactive substance has a half-life of four months. Three fourth of the substance would decay in
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The following table shows the percentage change in the consumption of electricity by five towns P, Q, R, S, T from 1986 to 1988: Town Per cent change from 1986 to 1987 From 1987 to 1988 P +8 −18 Q +15 −11 R +6 +9 S −7 −5 T +13 −6 If town T consumed 500,000 units in 1986, how much did it consume in 1988?
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Assertion (A): A chemical reaction becomes faster at higher temperatures.
Reason (R): At higher temperatures, molecular motion becomes more rapid.
Which of the following is correct?
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Which one of the following is NOT radioactive?
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Which one of the following is the correct sequence in increasing order of molecular weights of the hydrocarbons?
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In an atom, the order of filling up of the orbitals is governed by
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An aqueous solution of copper sulphate is acidic in nature because the salt undergoes
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Consider the following statements with reference to the Periodic Table of chemical elements: I. Ionisation potential gradually decreases along a period. II. In a group of elements, electron affinity decreases as the atomic weight increases. III. In a given period, electronegativity decreases as the atomic number increases.
Which of these statement(s) is/are correct?
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Quartzite is metamorphosed from
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Which of the following cell organelles play the most significant role in protein synthesis?
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Assertion (A): Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules.
Reason (R): DNA fragments can be manipulated using restriction endonucleases and DNA ligases.
Which of the following is correct?
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The cellular and molecular control of programmed cell death is known as
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Which organelle in the cell, other than nucleus, contains DNA?
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Epiphytes are plants which depend on other plants for
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Antigen is a substance which
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Which of the following features of DNA makes it uniquely suited to store and transmit genetic information from generation to generation?
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The American multinational company, Monsanto has produced an insect-resistant cotton variety that is undergoing field-trials in India. A toxin gene from which ONE of the following bacteria has been transferred to this transgenic cotton?
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Match List I with List II
and select the correct answer using the codes given below the Lists:
List I (Bone) I. Breast-bone II. Collar-bone III. Knee-cap IV. Shoulder blade
List II (Name) A) Clavicle B) Patella C) Scapula D) Sternum
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Consider the following statements: I. Tapeworm is a hermaphrodite. II. Round-worm has separate sexes. III. Filaria is caused by a nematode. IV. Guinea worm is an annelid.
Which of these are correct?
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Match List I with List II
and select the correct answer using the codes given below the Lists:
List I (Achievement in genetics) I. Discovery of transduction and conjugation in bacteria II. Establishing the sex-linked inheritance III. Isolation of DNA polymerase from E. coli IV. Establishing the complete genetic code
List II (Scientists) A) Khurana B) Kornberg C) Lederberg D) Morgan E) Ochoa
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“Athlete’s Foot” is a disease caused by
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In the eye donation, which part of the eye is transplanted from the donor?
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A man whose blood group is not known meets with a serious accident and needs blood transfusion immediately. Which one of the blood groups mentioned below and readily available in the hospital will be safe for transfusion?
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“Metastasis” is the process by which
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Match List I with List II
and select the correct answer using the codes given below the Lists:
List I (Substance) I. Ptyalin II. Pepsin III. Renin IV. Oxytocin
List II (Physiological role) A) Converts angiotensinogen in blood into angiotensin B) Digests starch C) Digests proteins D) Hydrolyses fats E) Induces contraction of smooth muscles
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Solve the given equations: x² + y² = 34 x⁴ − y⁴ = 544 The values of x and y are
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A worker reaches his factory 3 minutes late if his speed from his house to the factory is 5 km/hr. If he walks at a speed of 6 km/hr, then he reaches the factory 7 minutes early. The distance of the factory from his house is
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A conveyer belt delivers baggage at the rate of 3 tons in 5 minutes, and a second conveyer belt delivers baggage at the rate of 1 ton in 2 minutes. How much time will it take to get 33 tons of baggage delivered using both the conveyer belts?
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Water is filled in a container in such a manner that its volume doubles after every five minutes. If it takes 30 minutes for the container to be full, in how much time will it be one-fourth full?
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A city has a population of 3,00,000 out of which 1,80,000 are males. 50% of the population is literate. If 70% of the males are literate, the number of literate females is
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In a survey, it was found that 80% of those surveyed owned a car while 60% of those surveyed owned a mobile phone. If 55% owned both a car and a mobile phone, what per cent of those surveyed owned a car or a mobile phone or both?
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In 1930, a person’s age was 8 times that of his son. In 1938, the father’s age became ten times that of his son’s age in 1930. The ages of the son and father in 1940 were, respectively.
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A circle of 1 m radius is drawn inside a square as shown in the figure given above. What is the area of the shaded portion in m²?
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Most guitarists are bearded males. If A represents all males, B represents bearded males and C represents all male guitarists, then the correct diagram for their relation (shaded portion) is
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In the above figure, ABCD is a cyclic quadrilateral, AB = BC and angle BAC = 70°, then angle ADC is
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Anand must be a vegetarian because he is a Buddhist. The argument assumes that
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A person travels from X to Y at a speed of 40 kmph and returns by increasing his speed by 50%. What is his average speed for both the trips?