Science Technology Questions

81. Silk is a product of which part of the silkworm?

• A) Cocoon
• B) Exoskeleton
• C) Salivary gland of larva
• D) Digestive gland

82. Which of the following is not a solid planet?

• A) Mars
• B) Mercury
• C) Venus
• D) Jupiter

83. Which metal is commonly used to coat brass utensils to prevent copper contamination?

• A) Tin
• B) Silver
• C) Nickel
• D) Chromium

84. Which element was the first to be produced artificially?

• A) Americium
• B) Curium
• C) Berkelium
• D) Technetium

85. Which metal is present in insulin?

• A) Iron
• B) Magnesium
• C) Zinc
• D) Sodium

86. What is the speed of sound in air at sea level?

• A) 300 m/s
• B) 320 m/s
• C) 340.29 m/s
• D) 360 m/s

87. Who was the first chairman of the Indian Space Research Organisation (ISRO)?

• A) U. R. Rao
• B) Vikram Sarabhai
• C) G. Madhavan Nair
• D) K. Kasturirangan

88. In the presence of which substance does chlorine exhibit its bleaching action?

• A) Sodium chloride
• B) Laminaria
• C) Chlorella
• D) Ulva

89. Which group of animals typically does not live in saltwater environments?

• A) Cetaceans
• B) Sharks
• C) Amphibians
• D) Sea turtles

90. Cystitis is an infection affecting which organ?

• A) Spleen
• B) Gallbladder
• C) Thyroid
• D) Urinary bladder