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Chemistry: Post your doubts here!
There will be two oxygen atoms attached to form 2 ketone groups, one for each side. -
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Chemistry: Post your doubts here!
There are two C=C bonds. When reacted with H2, it can take in 2 H2 molecules. When reacted with Br2 it can also take in 2 Br2 molecules. -
Chemistry: Post your doubts here!
Trans and cis are possible at the double bonds when the ring has 8 or more carbons. -
Chemistry: Post your doubts here!
Honestly, its just as likely that D was the answer and we are running in circles trying hard to justify B. If I assume they are plotted on the same scale, and overlay the two graphs....if B was really the intended answer, would it be fair for students to see the very very slight shift to the... -
Chemistry: Post your doubts here!
The 58.5 kg is for NaCl (limiting reactant). The other reactant H2O is treated as an excess reactant. I'll look at the W04 question and post here later. At this moment, I am tempted to dismiss it as a typo in the marking scheme, because if the answer is indeed B instead of D, it would be... -
Chemistry: Post your doubts here!
Form a balanced equation for the reaction. 2NaCl + 2H2O --> H2 + Cl2 + 2NaOH Then solve it as a mole calculations question. The answer seems to be D to me. Could you check the mark scheme again? -
Chemistry: Post your doubts here!
You missed out on the dilution factor. Only 25cm3 out of the 250cm3 KOH was used for neutralization. -
Chemistry: Post your doubts here!
Nope. Removing from blue dot gives us this. -
Chemistry: Post your doubts here!
Question is asking about AlCl3 (covalent) , not AlCl3 dimer (Al2Cl6). In bonding, a complete transfer of electrons results in a "perfect" ionic compound . An equal sharing of electrons results in a "perfect covalent" compound. This can be seen as opposite ends of a spectrum. 100% ionic... -
Chemistry: Post your doubts here!
During dehydration, the OH is removed with a neighboring H atom (either the red dot or blue dot). Removing the OH and H atom at the red dot gives us option D. -
Chemistry: Post your doubts here!
CHO on 2 can be oxidized to COOH. However the benzene ring causes it to be poorly soluble in water. -
Chemistry: Post your doubts here!
As explained, NaF is expected to have higher mp than KCl. Sorry, realized I made a typo in my compounds in the earlier posts, i have amended them. -
Chemistry: Post your doubts here!
KCl vs NaF is ionic bonding. Depends on ionic radius and charge of ions. Halogens is VDW forces of attraction. Depends on size of electron clouds. -
Chemistry: Post your doubts here!
NaF is expected to have a higher mp/bp than KCl, as mp/bp is inversely proportional to the ionic radii. In other words, the larger the ions, the lower the mp/bp. Edited parts in yellow. -
Chemistry: Post your doubts here!
There is no need to do the half equations if you are unsure. Clues are already provided in the question stem. Reactants: NaCl and H2O Products: NaOH, H2 and Cl2 NaCl + H2O --> NaOH + H2 + Cl2 Alls thats left to do is to balance the equation. -
Chemistry: Post your doubts here!
1 is a tertiary halogenoalkane, it will undergo SN1 reactions, the reaction will take place in 2 steps the reaction pathway will contain an intermediate state Such reaction paths will be a double hump. 2 and 3 are primary halogenoalkanes, they will undergo SN2 reactions, the reaction... -
Chemistry: Post your doubts here!
The first reaction is the decomposition of the CaCO3 to CaO and CO2. BaCO3 remains unaffected. The 2nd reaction is the reaction of the BaCO3 with the acid.