Science & Technology PYQs
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Prelims 2000 · page 24 of 31Tap an option to check it. For one question at a time, use Start practice above.
Assertion (A): Small glass beads fixed on traffic signals glow brightly when light falls upon them.
Reason (R): Light is totally reflected when the angle of incidence exceeds a certain critical value and light travelling in a denser medium is reflected from a rarer medium.
The stones formed in human kidney consist mostly of
Most of the explosions in mines occur due to the mixing of
Match List I with List II and select the correct answer using the codes given below the Lists:
List I
I.German SilverII.SolderIII.Bleaching PowderIV.HypoList II
A) Tin
B) Nickel
C) Sodium
D) Chlorine
Codes:
Which one of the following materials is very hard and very ductile?
Soft drinks such as colas contain significant quantities of
Aluminium surfaces are often “anodized”. This means the deposition of a layer of
A small pouch containing silica gel is often found in bottles of medicine in tablet or powder form because silica gel
Match List I (Industrial processes) with List II (Industry with which associated) and select the correct answer using the codes given below the Lists:
List I
I.CrackingII.SmeltingIII.HydrogenationIV.VulcanizationList II
A) Rubber
B) Petroleum
C) Copper
D) Edible fats
Codes:
Assertion (A): Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluorocarbons.
Reason (R): Ammonia can be liquified at ambient temperatures at low pressures.
At which stage in its life-cycle does the silkworm yield the fibre of commerce?
Match List I (Diseases) with List II (Types of disease) and select the correct answer using the codes given below the Lists:
List I
I.HaemophiliaII.DiabetesIII.RicketsIV.RingwormList II
A) Deficiency disease
B) Genetic disease
C) Hormonal disorder
D) Fungal infection
Codes:
The blood glucose level is commonly expressed as
Phytotron is a facility to
Match List I (Endocrine glands) with List II (Hormones secreted) and select the correct answer using the codes given below the Lists:
List I
I.GonadsII.PituitaryIII.PancreasIV.AdrenalList II
A) Insulin
B) Progesterone
C) Growth hormones
D) Cortisone
Codes:
Insect resistant cotton plants have been genetically engineered by inserting a gene from a/an
Hybridoma technology is a new biotechnological approach for commercial production of
The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by
Consider the following statements: Hard water is not suitable for
I.Drinking.II.Washing clothes with soap.III.Use in boilers.IV.Irrigating crops.Which of these statements are correct?
Canola refers to special type of oil seed mustard varieties bred for human consumption. The main characteristic of these varieties is that the