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Chemistry MCQ thread...
yea it's rite... i counted the no of o2 atoms in s04 as well. -
Chemistry MCQ thread...
shuldn't we balance and find the no of moles???? nov 2004 q20. -
Chemistry MCQ thread...
Isn't it C? I mean shouldnt they be in pure elemental states for formation. ie, even N2 bonds have to be broken down to 2N and then the reaction proceeds..Im nt sure if this is rite bt im confused...with the ans as B.. -
Chemistry MCQ thread...
It can be all 3. 1)2 chlorines present, and therefore rate of reaction will be faster and the amount produced for a given tim e will be greater. It can be 2 and 3 as well coz the c-br and c-cl bond energies are lower than that of c-cl. therefore reaction can proceed at a faster rate. -
Chemistry MCQ thread...
pls explain. Im a little confused over here. Should we consider the no of moles produced or consider the bonds... -
Chemistry MCQ thread...
Chlorine is both oxidised and reduced when it reacts with water or with sodium hydroxide solution – disproportionation reactions. With water: Cl2(aq) + H2O(l) " HOCl(aq) + HCl (aq) With cold dilute NaOH solution: Cl2(aq) + 2NaOH(aq) ---> " NaCl (aq) + NaOCl (aq) + H2O(l) With hot concentrated... -
Chemistry MCQ thread...
Chlorine is both oxidised and reduced when it reacts with water or with sodium hydroxide solution – disproportionation reactions. With water: Cl2(aq) + H2O(l) " HOCl(aq) + HCl (aq) With cold dilute NaOH solution: Cl2(aq) + 2NaOH(aq) ---> " NaCl (aq) + NaOCl (aq) + H2O(l) With... -
chem mcq...
havea problem with this one. got the ans as -74 bt given as -81.. pls help http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9701%20-%20Chemistry/9701_s05_qp_1.pdf -
Chemistry Paper 1 Doubts!
q22) For chirality to exist each c atom shud have two different atoms or groups of atoms attached to it. In A,B,and C the c atom is attached to the same group, ie.h2, and ch3. Therefore the option is D. -
chem mcq...
i think its coz when, aluminium reacts with oxygen it forms a layer of aluminium oxide which prevents further reaction so how can it form a nitrate??? This is my kind of analysis.... -
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chem mcq...
can someone help me with the 16th question.. http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9701%20-%20Chemistry/9701_w05_qp_1.pdf -
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PLS HELP!!!! AS PHYSICS DOUBT.....
http://www.xtremepapers.me/CIE/Internat ... 9_qp_2.pdf q 5 part b.. -
The Ultimate AS Physics Thread
Speed will remain the same. Explanation- Speed depends on the voltage. In this question voltage and the charge is constant throughout.According to the equation voltage=wd/charge if voltage is the same wd will also be the same. Therefore kinetic energy is constant and hence the speed remains the... -
BIOLOGY P2 PAPER
streptomycin is a an antibiotic used against tb. They had asked as to how it acts on the ribosome to inhibit protein synthesis...ANd i just guessed some answers for it.. -