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Physics - Part 3

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1. ഒരു കാറും അതിൻറെ ഇരട്ടി മാസ്സുള്ള ഒരു ലോറിയും ഒരേ ഗതികോർജ്ജത്തിൽ നേർദിശയിൽ പോകുന്നു. താഴെ തന്നിരിക്കുന്ന പ്രസ്താവനകളിൽ ശരിയായത് ഏത്?

2. Match the following compounds with their descriptions.

1. Ferrocenea. Organometallic compound with a sandwich structure
2. Zeise's saltb. Catalyst for alkene hydrogenation
3. Wilkinson's catalystc. Tetrameric structure with alkyl bridges
4. Methyl lithiumd. Organometallic compound of platinum with ethylene

3. Which of the following statements is correct about the Wacker process? I. The process converts ethylene to acetaldehyde. II. Palladium (II) chloride is reduced to metallic palladium in the reaction. III. Copper (II) chloride regenerates the palladium (II) catalyst.

4. നീളത്തിൻറെ യൂണിറ്റുകളെ വലുതിൽ നിന്ന് ചെറുത് വരുന്ന രീതിയിൽ ശരിയായി ക്രമീകരിച്ചിരിക്കുന്നത് ഏത്?

5. Which of the following statements is false regarding Ziegler-Natta polymerization ? I. It is used for producing highly branched polymers. II. It involves coordination-insertion polymerization. III. Tetraethylaluminium serves as a co-catalyst.

6. 2024 ഭൗതിക ശാസ്ത്രത്തിനുള്ള നൊബേൽ ജോൺ ഹോപ്പീൽഡ്, ജെഫ്രി ഹിൻടൺ എന്നിവർക്ക് ലഭിച്ചത് എന്ത് കണ്ടുപിടിത്തത്തിനാണ്?

7. Which of the following ion is identified using the Chromyl chloride test?

8. In Thermo Gravimetric Analysis (TGA), what does a weight loss plateau indicate ?

9. While coming to a stop, a cyclist skids 5 m. The road exerts a 200 N force opposite to the motion? (a) Determine the work performed by the road on the cycle. (b) How much work does the cycle do on the road?

10. Why is it dangerous to hold your breath while ascending from depth during scuba diving?

11. What is the pKa value of a weak acid if its Ka value is 2.0×1042.0 \times 10^{-4}? (log 2 = 0.30)

12. Which of the following reagents is used to separate Group III cations?

13. Dry saturated steam means:

14. Match the following flame colour with their descriptions.

1. Apple greena. Potassium
2. Brick redb. Barium
3. Violetc. Strontium
4. Crimson redd. Calcium

15. Which requires more fuel: a voyage from the Earth to the Moon, or a voyage from the Moon to the Earth?

16. Volume of one kilogram of superheated steam is :

17. What is the purpose of the Q-test in data analysis ?

18. A cricket player lowers his hands while catching a fast ball. Which Newton's law is directly applied, and why does this reduce injury?

19. A submarine can rise or sink in water by controlling its ballast tanks. When the tanks are filled with water, the submarine sinks and the tanks are filled with air, it rises. Which principle explains this ability?

20. Identify the correct statements regarding complexometric titrations. I. EDTA forms stable complexes with most metal ions. II. The indicator used changes color when it binds to metal ions. III. EDTA titrations are unaffected by pH changes.