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ResFinder - Thousands of Practice Papers
Why are lead salts not tested for flame test? |
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| asked by Anvaya Juvekar (anvaya) 5 years ago |
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The message icon at the top of my page shows "8" but I've read all the messages. What's more, the number has been increasing (from 1 to 8 now). Anyone else having the same issue?
P.S. I haven't even blocked anyone... |
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| asked by ... (sam307) 5 years ago |
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To all potterheads and hungerheads! I just found this, enjoy!
https://www.youtube.com/watch?v=D9Mv6gXqADM |
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| asked by Mr. Mathematics (aditya_bandaru) 5 years ago |
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Ooooh, idk why I have to say this but...
PW has 1M subs now!! |
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| asked by Aryan Gupta (xprince) 5 years ago |
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Happy Holi Resmates(my virtual friends) and to your family
[actually today in our state Holi is being celebrated] |
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| asked by SODA The Ultimate comedy (aniruddha_1) 5 years ago |
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What is the difference in case of metals-
Chemical reactivity and ability to discharge at cathode? |
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| asked by Bitthal Maheshwari (bitthal04) 5 years ago |
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1. Is Sodium hydrogen carbonate(NaHCO3) a basic salt or an acidic salt? According to defn, since it has a hydrogen atom, it should be acidic, but in reality, NaHCO3(Baking soda) is used to neutralize acids right?
2. Do basic soluions too have H+(aq.) ions? Explain why they are basic by taking an example.
3. Why is "Contact" Process called so? I was just curious.
4. Why is Ammonium "Chloride" used in Lab. Prep. of Ammonia?
5. Are Deliquescence, Efflorescence, etc. in syllabus? They aren't mentioned...
6. Why is it "Basicity of Acids" and "Acidity of Bases" ? Why not "Basicity of Bases" and "Acidity of Acids" ?(Again, curiosity)
7. Colour changes in which indicators should we remember ? Is Litmus, Methyl Orange & Phenolphthalein enough?
8. Syllabus of Metallurgy starts from Minerals and Ores, right? I assume general properties of metals and non-metals aren't in syllabus?
9. Is Na2CO3 a basic salt, or a normal salt? Since it's made of a strong base & weak acid, but at the same time, doesn't have OH- ions to make it basic...
10. Are numericals on pH value required?
Sorry if it's a bit too long(I know it is). But I'd appreciate anyone taking out time to answer these. |
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| asked by Prateek Pradhan (prateek235) 5 years ago |
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1.As we move from left to right in period 3,the gram atomic VOLUME of the elements ______
2.If the empirical formula of a compound is CH2O, then its mol. form can be-a) C2H2 b) C2H4O c) C3H6O d) C6H12O
[told ya they ask marvelous stuff in prelims.]
3.Why is H+ called a proton? [For 2 marks]
4.A compound X(molform C2H2O2) reacts with Na to form a comp R and evolves a gas which burns with pop sound. Comp X on treatment with alcohol A in presence of an acid forms a sweet smelling compound S molform C3H6O2. on addition of NaOH to X also gives R and water. S on treatment with NaOH sol gives back R and A. Identify each. [4 marks] |
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| asked by Isha Choudhury (dessicatedcoconut) 5 years ago |
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RESUSER : *makes a grammatical mistake*
ME : *what new word is this* *he is so good in English* *so rich vocabulary* *I can't even understand these high-tech words* *Is it Shakespearean* *I am so stupid* |
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| asked by Ansh Anand (teleansh) 5 years ago |
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Why is HCl a stronger acid than H2CO3 or organic acids? For that matter, can you explain the same case with bases as well (alkalis--- KOH vs. Ca(OH)2 or NH4OH)
Is it to do with partial or complete dissociation? |
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| asked by Aditi RK (sciencegeek) 5 years ago |
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