4021. Dinosaurs and many other species were extinct about ___ years ago.
✅ A. 66 million
Everyday Science MCQs – Page 202
4022. The chemical used as a fixer in photography is_____?
✅ C. sodium thiosulphate
4023. The severity of 2005 earthquake in Pakistan on Richter scale was ?
✅ A. 7.6
4024. Which Vitamin help blood clotting?
✅ D. Vitamin K
4025. The Lake of Vitamin C creates which disease ?
✅ B. skin disease
4026. Which Vitamins is not stored in Human Body
✅ C. Vitamin C
4027. What is the Velocity of sound m/s
✅ B. 343
4028. Which element plants exhale at night?
✅ A. Carbondoxide
4029. In the Composition of the earth, Aluminum is _____?
✅ D. 8.23%
4030. The total energy of revolving electron in an atom________
✅ A. Can never be positive
4031. Which of the following chemicals is not found in tobacco smoke?
✅ C. Nail polish remover
4032. Iodised salts contains the iodine salts of which metal?
✅ A. Potassium
4033. Materials for rain-proof coats and tents owe their water proof properties to___?
✅ B. Surface tension
4034. The human heart is __ ?
✅ C. Myogenic Heart
4035. A person with which of the following blood groups can receive blood of any group?
✅ A. AB
4036. What animal has longest gestation period of about 640 to 660 days or 95 weeks of any land animal ?
✅ A. Elephant
4037. Which group of animals has heterogametic females?
✅ A. Earthworm
4038. How long does the earth take to cover 1° longitude?
✅ C. 4 Minutes
4039. Which lenses are used by people having short-sightedness?
✅ A. Concave
4040. T.V. transmission cannot cover a very large area because
✅ C. the shape of the earth is spherical