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 pluse 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. *Car...
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