Separation techniques
Quiz
•
Chemistry
•
1st Grade
•
Practice Problem
•
Medium
Wan Mahirah
Used 12+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Pembentukan emulsi semasa pengekstrakan dapat dipecahkan dengan mengguna kaedah
menitiskan pelarut organik ke dalam emulsi
melarutkan emulsi dengan kloroform
menepukan fasa berair dengan sodium chloride
menambahkan beberapa titis air suling
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dalam proses pengekstrakan cecaie-cecair (LLE) sebatian hydrofobik akan lebih tertarik kepada
alkohol
sodium chloride
fasa berair
pelarut organik
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dalam proses pengekstrakan fasa pepejal, analit yang dikehendaki biasanya
tidak boleh dipisahkan dengan komponen matriks
berinteraksi dengan fasa bergerak
dikeluarkan semasa proses washing
terjerap pada cartridge (fasa pepejal)
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Fasa pegun yang digunakan dalam analisis Thin Layer Chromatography (TLC) mengandungi bahan penjerap yang terdiri daripada
kaca
silika gel
plastik
logam
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Berikut adalah faktor yang mempengaruhi pergerakan analit di dalam Thin
Layer Chromatography KECUALI
kepolaran analit
jisim molekul relatif analit
keterlarutan analit di dalam pelarut
keserapan analit terhadap fasa pegun
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Fasa bergerak yang digunakan di dalam High Performance Liquid Chromatography hendaklah
mudah meruap
mengandungi kelikatan yang rendah
mudah bertindakbalas dengan sampel
mempunyai penyerapan UV yang tinggi
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Apakah tujuan membuang gas terlarut (degass) di dalam fasa bergerak High Performance Liquid Chromatography?
Menghalang buih udara daripada memasuki kolum.
Mengasingkan bahan terampai yang terdapat di dalam buih udara
Mengelakkan berlakunya interaksi di antara gas terlarut dan sampel.
Mengurangkan perlekatan gas dengan fasa pegun.
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