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HSSC TGT Science Date 29/4/2023 Evening Shift
📆 November 23, 2024
Total Questions: 100
81.
The standard boiling point of water is:
(a) 89.1°C (362.1 K)
(b) 98.9°C (362.9 K)
(c) 99.6°C (372.6 K)
(d) 99.9°C (372.9 K)
(e) Unattempted
Correct Answer:
(c) 99.6°C (372.6 K)
82.
The gene pool (total genes and their alleles in a population) remains a constant. This is called:
(a) Genetic variation
(b) Genetic migration
(c) Genetic drift
(d) Genetic equilibrium
(e) Unattempted
Correct Answer:
(d) Genetic equilibrium
83.
The object 2.5 cm high is placed at a distance of 10 cm from a concave mirror of radius of curvature 30 cm. The size of the image is:
(a) 9.2 cm
(b) 7.5 cm
(c) 5.6 cm
(d) 10.5 cm
(e) Unattempted
Correct Answer:
(b) 7.5 cm
84.
Which of the following consumption has been claimed to increase the performance of athletes and race horses?
(a) Pedicel
(b) Corolla
(c) Calyx
(d) Pollen
(e) Unattempted
Correct Answer:
(d) Pollen
85.
The observed order of carbocation stability is:
(a) CH₃ > CH₂CH₂ > CH₂CH(CH₃)₂ > CH₂C(CH₃)₃
(b) (CH₃)₃C < CH₃(CH₃)CH < CH₃ < CH₂CH₂
(c) CH₃ < (CH₃)₃C < CH₃CH₂ < CH₃CH₂CH
(d) CH₃ > CH₂CH₃ < CH₂C(CH₃)₂ < CH₃CH₂
(e) Unattempted
Correct Answer:
(d) CH₃ > CH₂CH₃ < CH₂C(CH₃)₂ < CH₃CH₂
86.
Gross primary productivity of an ecosystem is the:
(a) Rate of production of organic matter during photosynthesis
(b) Rate of production of organic matter during transpiration
(c) Rate of production of organic matter during respiration
(d) None of the above
(e) Unattempted
Correct Answer:
(a) Rate of production of organic matter during photosynthesis
87.
Colours of thin films result from:
(a) Dispersion of light
(b) Scattering of light
(c) Absorption of light
(d) Interference of light
(e) Unattempted
Correct Answer:
(d) Interference of light
88.
Which intestinal parasite causes ascariasis?
(a) HIV
(b) Ascaris
(c) Plasmodium
(d) Salmonella
(e) Unattempted
Correct Answer:
(b) Ascaris
89.
The production of dihydrogen can be increased by reacting carbon monoxide or syngas mixtures with steam in the presence of ............ catalyst:
(a) Iron
(b) Lead arsenite
(c) Lead
(d) Iron chromate
(e) Unattempted
Correct Answer:
(d) Iron chromate
90.
Which of the following has greatest biodiversity on Earth?
(a) Himalayan forest
(b) Western Ghat forest
(c) Andaman-Nicobar forest
(d) The largely tropical Amazonian rain forest
(e) Unattempted
Correct Answer:
(d) The largely tropical Amazonian rain forest
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