Medical Entry Test MCQs [Chemistry] ch.1
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1- isotopes are sister atoms of same element with similar chemical properties but different(a) atomic number
(b)atomic volume
(c)atomic mass
(d)atomic structure
2-cadmium has isotopes
a-3
b-6
c-9
d-12
3-atomic masses of elements were determined by
a-john Dalton
b-Berzelius
c-Avogadro
d-Democritus
4-what is the mass of one mole of Iodine molecule.
a-53b-74
c-250
d-254
5-in combustion analysis CO2 is absorbed in
a-mg(ClO4)2
b-lime water
c-concentrated H2SO
d-50%KOH
6-the collection of Avogadro no of [articles represent
a-molecule
b-empirical formula
c-formula unit
d-mole
7-CO+ is an example of
a-free radicalb-cationic molecular ion
c-stable molecule
d-anionic molecular ion
8-which of the following has the max num of moles
a-1g of H2O
B-40g of H2O
C-36g of H2O
d- none
9-%of O2 in H2O is
a-80%
b-88.8%
c-70%
d-none
10-the SI unit of measurement of quantity is
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1) C
ReplyDelete2) C
3) B
4) D
5) A
6) D
7) D
8) B
9) B
10) C
11) B
12) Wrong statement
13) A & B have Avogadro's no. of molecules where as C has 0.63Avogadro's number of molecules
14) 0.4 %
15) A
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ReplyDeletei m weak in chemistry calculations plz help me
ReplyDeleteyes tell me please
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NO 12th statement is right and ans is C=1 MOLE
ReplyDeleteReason is that ...one mole of any type of ideal gas occupies the volume of 22.414dm`3 at S.T.P.....less than 1 mole less will be the occupied volume at S.T.P..more than 1 mole more wil be the volume at S.T.P..
hence 1 mole is correct ans...
Friends 12th statement is not wrong as one guy answered below..the correct ans is C=1 MOLE
ReplyDeleteReason is that ...one mole of any type of ideal gas occupies the volume of 22.414dm`3 at S.T.P.....less than 1 mole less will be the occupied volume at S.T.P..more than 1 mole more wil be the volume at S.T.P..
hence 1 mole is correct ans...
i can explain
ReplyDelete88.8% is %age as mass..total mass of water is 18.016g.
16+2.016=18.016g
so for oxygen;as in water it has only 1 atom so we take as 16 gram; calcs=
16*100/18.016=88.8%
I m week in organic chemistry plzzz help me
ReplyDeleteRelavance to first question
ReplyDeleteIsotopes have different mass numbers not atomic mass numbers both are different things ..
As mueen said
ReplyDelete1 mole of H=6.02x10^23 atoms of H=22.7dm^3
So statement is absolutely correct
thanx all team of Medical entery test guide hmary lyy itna acha page bnaya but wearss the ans of this msqs :)
ReplyDeleteCheck the comments please
ReplyDeleteplz give me ans of 7 and 15 with explanation
ReplyDeletegive me ans plz
ReplyDeleteplzz help me m tnx too much cnt undrstd too much week in chem plzzzzzz help me :(
ReplyDeleteyes its correct
ReplyDeletehow.. i thin 15 has option a correct as 3.01*10^23 has .5 moles..... now according to frmula mole=mass/molar mass.... multiplying .5 with 23(molar mass of sulphur) ans is 11.5 which is more than 2g..so a option is correct
ReplyDeletepls ans and explain me question 13
ReplyDeleteAll Answers will be available in Entry Test Class with hundreds of more MCQs
ReplyDeletegood test
ReplyDeletedo anybody have answers of sample paper mcat?
ReplyDeletedo we need to learn amino acids and their structures apart from our book (fsc 2nd year)?
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