Q1. Washing Soda is the common name of? Ans: Sodium Carbonate
Q2. The Chemical Name of Laughing gas is? Ans: Nitrous Oxide
Q3. The Cell discovered by? Ans. Robert Hook in 1665
Q4. The Nucleus is discovered by? Ans. Robert Brown in 1831
Q5. The Microscope was discovered by? Ans. Galileo in 1610
Q6. Ball Pen Invented by? Ans. Amrican Scientist Jan Lowd in 1888
Q7. Mercury is also known as? Ans. Quick Silver
Q8. How many Legs do butterflies have? Ans. 6 legs and 2 pair of wings
Q9. The Heart of a Normal adult human being weight about? Ans. 300 grams
Q10. What is the average adult pulse rate? Ans. 72 – 80
Q11. The Cow’s milk contains how much amount of water in terms of percentage? Ans. 80%
Q12. Instrument to detect the purity of Milk is? Ans. Lactometer
Q13. Radioactivity was First Discovered by? Ans. Madam Curry
Q14. Which gas is commonly used in balloons and airships? Ans. Hydrogen
Q15. Which gas is used in the preparation of soft drinks? Ans. Carbon dioxide
Q16. In blood ‘the percentage of water is? Ans. 90%
Q17. The volume percentage of Nitrogen in air is? Ans. 78%
Q18. Air contains volume of carbon dioxide? Ans. 0.03%
Q19. For water purification we use? Ans. Chlorine
Q20. The human blood is divided into? Ans. 4 groups
Q21. A Man can Survive without food? Ans. One month
Q22 The muscles, tissues, and blood all are made up of? Ans. Proteins
Q23. What does make the blood look red? Ans. Hemoglobin
Q24. The acid used in a Car battery is? Ans. Sulphuric acid
Q25. The major part of natural gas ‘petroleum and coal’ consist of? Ans. Methane
Q26. The speed of sound is? Ans. 340 meter per second
Q27. During sleep a man’s blood pressure? Ans. Fluctuates
Q28. The smallest plants on the earth are? Ans. Algae
Q29. Who invented the polio vaccine (oral)? Ans. Albert Sabin
Q30. Total volume of blood in a normal human being? Ans. 5-6 liters*