CHM191
Which of the following is not a laboratory operation?
Answer: eating
Which of the following is not an indicator in titrimetric method of analysis?
Answer: methyl yellow
an element that undergoes a decrease jn oxidation number is called?
Answer: oxidizing agent
Oxidation involves â€|.?
Answer: electron loss
150g of NaOH in 1000cm3 of water is said to be a?
Answer: concentrated solution
What is the apparatus used in measuring a sodium hydroxide peroxide pellet?
Answer: balance
What is the pH range of phenolphthalein?
Answer: 8.3 – 10.00
Which of the following apparatus is not used in volumetric analysis?
Answer: weighing balance
What is the unit of measuring volume is?
Answer: m3
Which of the following is not a characteristics of a pure substances
Answer: deliquescent
Which of the following is considered while working in the laboratory?
Answer: precaution
Which of the following is not a reason why some substances whose purity cannot be exactly known
Answer: because they are non-volatile.
The number of moles of solute in one kilogram (kg) of solution is called ?
Answer: molality
150g of NaOH in 1000cm3 of water is said to be a?
Answer: concentrated solution
Avogadro number is?
Answer: 6.023 x 10-23
Find the mole of NaOH if its mass is 40g (Na = 23,0 = 16, H=1)
Answer: 1.00 mol
Mass in chemistry is measured in?
Answer: gram
The abbreviation of mole is?
Answer: mol
A substance which when, purchased does not change in its chemical composition with time of storage is said to be in
Answer: pure form
Which of the following is not a laboratory operation?
Answer: eating
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