HSSC TGT Science Date 29/4/2023 Evening ShiftTotal Questions: 10081. 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) UnattemptedCorrect 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) UnattemptedCorrect Answer: (d) Genetic equilibrium83. 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) UnattemptedCorrect Answer: (b) 7.5 cm84. 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) UnattemptedCorrect Answer: (d) Pollen85. 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) UnattemptedCorrect Answer: (d) CH₃ > CH₂CH₃ < CH₂C(CH₃)₂ < CH₃CH₂86. 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) UnattemptedCorrect Answer: (a) Rate of production of organic matter during photosynthesis87. Colours of thin films result from:(a) Dispersion of light(b) Scattering of light(c) Absorption of light(d) Interference of light(e) UnattemptedCorrect Answer: (d) Interference of light88. Which intestinal parasite causes ascariasis?(a) HIV(b) Ascaris(c) Plasmodium(d) Salmonella(e) UnattemptedCorrect Answer: (b) Ascaris89. 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) UnattemptedCorrect Answer: (d) Iron chromate90. 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) UnattemptedCorrect Answer: (d) The largely tropical Amazonian rain forestSubmit Quiz« Previous12345678910Next »
