In the given figure, angle QOP = 30° and angle ORP = 20°, angle QOR is equal to
- (a)100°
- (b)120°
- (c)130°
- (d)140°
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Official answer(c) 130°
Science & Technology
923 questions asked in UPSC Prelims.
A club has 108 members. Two-thirds of them are men and the rest are women. All members are married except for 9 women members. How many married women are there in the club?
- (a)20
- (b)24
- (c)27
- (d)30
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Official answer(c) 27
The following figure represents time vs. learning curves of two students, Q and R, for learning a Mathematics lesson. Which one of the following inferences can be drawn from the graph?
- (a)R started slowly in the beginning but got ahead of Q to complete learning the lesson
- (b)Q started slowly and finished learning the lesson earlier than R
- (c)R was always faster than Q in learning Mathematics
- (d)Q was always faster than R in learning Mathematics
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Official answer(b) Q started slowly and finished learning the lesson earlier than R
A person starts from a point A and travels 3 km eastwards to B and then turns left and travels thrice that distance to reach C. He again turns left and travels five times the distance he covered between A and B and reaches his destination D. The shortest distance between the starting point and destination is
- (a)18 km
- (b)16 km
- (c)15 km
- (d)12 km
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Official answer(c) 15 km
The distribution of 1,00,000 tourists who visited India during a particular year is shown in the given charts. Based on this, the number of Japanese tourists below the age of 39 who visited India in the year concerned is
- (a)10,000
- (b)8,000
- (c)6,000
- (d)4,000
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Official answer(d) 4,000
What is the maximum number of pieces of 5 cm × 5 cm × 10 cm cake that can be cut from a big cake of 5 cm × 30 cm × 30 cm size?
- (a)10
- (b)15
- (c)18
- (d)30
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Official answer(c) 18
Assertion (A): Information technology is fast becoming a very important field of activity in India. Reason (R): Software is one of the major exports of the country and India has a very strong base in hardware.
- (a)Both A and R are true, and R is the correct explanation of A
- (b)Both A and R are true, but R is not a correct explanation of A
- (c)A is true, but R is false
- (d)A is false, but R is true
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Official answer(c) A is true, but R is false
In eye donation, which one of the following parts of donor’s eye is utilised?
- (a)Iris
- (b)Lens
- (c)Cornea
- (d)Retina
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Official answer(c) Cornea
Consider the following statement: An ordinary light bulb has a rather short life because the I. Filament wire is not uniform. II. Bulb cannot be evacuated completely. III. Wires supporting the filament melt at high temperatures. Which of the above statements are correct?
- (a)I and III
- (b)II and III
- (c)I and II
- (d)I, II and III
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Official answer(b) II and III
Match the hormones in List I with items in List II and select the correct answer using the codes given below the Lists: List I I. Adrenaline II. Estrogen III. Insulin IV. Pheromones List II A) Anger, fear, danger B) Attracting partners through sense of smell C) Females D) Glucose Codes:
- (a)I-C, II-A, III-D, IV-B
- (b)I-A, II-C, III-B, IV-D
- (c)I-A, II-C, III-D, IV-B
- (d)I-C, II-A, III-B, IV-D
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Official answer(c) I-A, II-C, III-D, IV-B
Neem tree has acquired industrial importance as a source of
- (a)biopesticide and anti-fertility compound
- (b)anti-fertility compound, biofertilizer and anti-cancer drug
- (c)biofertilizer, biopesticide and anti-fertility compound
- (d)anti-cancer drug, biopesticide and biofertilizer
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Official answer(a) biopesticide and anti-fertility compound
Match List I (Drugs / Chemicals) with List II (Their uses) and select the correct answer using the codes given below the Lists: List I I. Atropine II. Ether III. Nitro-glycerine IV. Pyrethrin List II A) Local anaesthesia B) Heart trouble C) Dilation of pupil D) Mosquito control Codes:
- (a)I-A, II-C, III-B, IV-D
- (b)I-A, II-C, III-D, IV-B
- (c)I-C, II-A, III-D, IV-B
- (d)I-C, II-A, III-B, IV-D
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Official answer(d) I-C, II-A, III-B, IV-D
Match List I (Naturally occurring substances) with List II (Elements) and select the correct answer using the codes given below the Lists: List I I. Diamond II. Marble III. Sand IV. Ruby List II A) Calcium B) Silicon C) Aluminium D) Carbon Codes:
- (a)I-C, II-A, III-B, IV-D
- (b)I-D, II-B, III-A, IV-C
- (c)I-B, II-A, III-C, IV-D
- (d)I-D, II-A, III-B, IV-C
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Official answer(d) I-D, II-A, III-B, IV-C
Indian farmers are unhappy over the introduction of “Terminator Seed Technology” because the seeds produced by this technology are expected to
- (a)show poor germination
- (b)form low yielding plants despite the high quality
- (c)give rise to sexually sterile plants
- (d)give rise to plants incapable of forming viable seeds
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Official answer(d) give rise to plants incapable of forming viable seeds
Consider the following statements regarding a motor car battery: I. The voltage is usually 12 V. II. Electrolyte used is hydrochloric acid. III. Electrodes are lead and copper. IV. Capacity is expressed in ampere-hour. Which of the above statements are correct?
- (a)I and II
- (b)II and III
- (c)III and IV
- (d)I and IV
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Official answer(d) I and IV
Match List I (Quantity) with List II (Units) and select the correct answer using the codes given below the Lists: List I I. High speed II. Wavelength III. Pressure IV. Energy List II A) Mach B) Angstrom C) Pascal D) Joule Codes:
- (a)I-B, II-A, III-C, IV-D
- (b)I-A, II-B, III-D, IV-C
- (c)I-A, II-B, III-C, IV-D
- (d)I-B, II-A, III-D, IV-C
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Official answer(c) I-A, II-B, III-C, IV-D
Which one of the following genetic diseases is sex-linked?
- (a)Royal haemophilia
- (b)Tay Sachs disease
- (c)Cystic fibrosis
- (d)Hypertension
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Official answer(a) Royal haemophilia
For which one of the following is capillarity not the only reason?
- (a)Blotting of ink
- (b)Rising of underground water
- (c)Spread of water drop on a cotton cloth
- (d)Rising of water from the roots of a plant to its foliage
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Official answer(b) Rising of underground water
Consider the following statements: I. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is. II. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is. Which of the above statements is/are correct?
- (a)I and II
- (b)I alone
- (c)II alone
- (d)Neither I nor II
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Official answer(a) I and II
Lathyrism is caused by excessive consumption of
- (a)Kesari dal
- (b)Mustard oil
- (c)Polished rice
- (d)Mushrooms
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Official answer(a) Kesari dal
Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because
- (a)barium allows X-rays to pass through the stomach on account of its transparency to X-rays
- (b)barium compound, like magnesium sulphate helps in cleaning the stomach before X-ray examination
- (c)barium is a good absorber of X-rays and this helps the stomach to appear clearly in contrast with the other regions in the picture
- (d)barium salts are white in colour and this helps the stomach to appear clearly in contrast with other regions in the picture
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Official answer(c) barium is a good absorber of X-rays and this helps the stomach to appear clearly in contrast with the other regions in the picture
Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on the phenomenon of
- (a)total internal reflection
- (b)interference
- (c)diffraction
- (d)polarisation
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Official answer(a) total internal reflection
Strips of two metals A and B are firmly joined together as shown in the figure. On heating, A expands more than B does. If this joined strip is heated, then it will appear as:
- (a)As shown in figure (a)
- (b)As shown in figure (b)
- (c)As shown in figure (c)
- (d)As shown in figure (d)
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Official answer(b) As shown in figure (b)
When ants bite, they inject
- (a)glacial acetic acid
- (b)methanol
- (c)formic acid
- (d)stearic acid
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Official answer(c) formic acid
Cobalt-60 is commonly used in radiation therapy because it emits
- (a)alpha rays
- (b)beta rays
- (c)gamma rays
- (d)X-rays
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Official answer(c) gamma rays