331. Who invented steamboat?
A. James Watt
B. Robert Fluton
C. Frank Whittle
D. George Stephenson

332. Who discovered blood circulation?
A. Carl Linnaeus
B. Francis Crik
C. Robert. Brown
D. William Harvey

333. Who said that light is made of corpuscles/particles?
A. Maxwell
B. Einstein
B. Newton
D. Huygein

334. According to which law gas is directly proportional to temperature?
A. Charles Law
B. Boyles Law
C. Grams Law
D. Dalton’s Law

335. Fan was invented by___________?
A. Arthur Schimit
B. Alfered Nobel
C. Skaats Wheeler
D. None of these

336. __________ gas is released when coal is burns in ln lack of Oxygen?
A. Carbon Dioxide
B. Methane
C. Ethene
D. Carbon Monoxide

337. Which gas is used to extinguish fire?
A. Nitrous Oxide
B. Methane
C. Carbon Dioxide
D. Carbon Dioxide & Nitrous Oxide

338. Which of following is the smallest endocrine gland in the human body?
A. Thyroid gland
B. Pituitary gland
C. Adrenal gland
D. Pineal gland

339. Another name of vitamin C is__________?
A. Ascorbic Acid
B. Acitic Acid
C. Citric Acid
D. Lysozyme

340. Which of the following gland has shape of butterfly?
A. Thyroid gland
B. Pituitary gland
C. Adrenal gland
D. Pineal gland