General Science Quiz - 9 (#sciencequiz)(#eduvictors)(#compete4exams)

Science Quiz - 9

(Q & A)

Q1: Which organism is used in production of alcohol ?

Answer: Yeast

Q2: Gasohol is a combination of gasoline and ?

Answer: Ethyl alcohol

Q3: Oil spreads over the surface of water because ...?

Answer: Oil has less surface tension than water

Q4: The working principle of a Washing Machine is?

Answer: Centrifugation

Q5: The sounds having a frequency of 20 hertz to 20,000 hertz are known as

Answer: Audible sounds

Q6: Pure water is bad conductor of electricity because it is

Answer: Poor ionisation

Q7: Which metal remains in liquid form under normal conditions ?

Answer: Mercury

Q8: Potassium Permanganate is used for purifying drinking water, because ...?

Answer: It is an oxidising agent and has antiseptic properties.

Q9: The main constituents of pearls are?

Answer: Calcium carbonate and magnesium carbonate

Q10: The branch of physiology and medicine concerned with heart is known as

Answer:  Cardiology

Q11: Dyslexia is associated with ...?

Answer: Reading disorder

Q12: Aristotle reasoned that the heavens were composed of a fifth element, called _____?

Answer: ether

Q13: What is a selenologist?

Answer: A selenologist is a scientist who studies the moon.

Q14: Who wrote the famous book Systema Naturae and talked about scientific naming system of living organisms?

Answer: Carolus Linnaeus

Q15: Name the planet that contains the Great Red Spot that is about 13,000 kilometers wide and 32,000 lm long.

Answer: Jupiter

Q16: Name the world’s largest flower.

Answer: Rafflesia arnoldi

Q17: Who showed that the planets did not orbit the sun in circles but in perfect ellipses?

Answer: Kepler

Q18: Which plant tissue mainly responsible for making woody parts of the plant?

Answer: Xylem

Q19: Name the the acid that makes unripe apples sour.

Answer: Malic acid

Q20. Name the scientist who introduced a classification scheme for plants in 1667. He grouped them into monocots and dicots.

Answer: John Ray

Q21: What is hypothesis?

Answer: A hypothesis is a scientific idea that can be tested.

Q22: What is the the scientific SI unit for energy?

Answer: Joule

Q23: Name the physical quantities that have magnitude and direction.

Answer: Vector quantities.

Q24: The weight of an object can be thought of as acting at a single point, it is called as?

Answer: Center of mass

Q25: Which law law states that every force is accompanied by an equal force acting in the opposite direction?

Answer: Newton's third law of motion.