Test Details

Science -2

Is matter around us pure

Nov 08, 10:00 AM

45 minutes

Nov 09, 10:00 AM

70.0 marks

MCQ

30 questions

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Question Text

Question 1 :
You are provided with a mixture of petroleum and water. Can you  separate the two by :<br/>

Question 3 :
Which of the following is a property of a pure substance?

Question 6 :
The components of a mixture of two miscible liquids having boiling differing by $20^o$C or more can be separated by :<br/>

Question 12 :
Crude oil is purified using fractional distillation process. This method works on the principle of:

Question 13 :
The dye from blue fountain pen can be separated by :

Question 15 :
Which of the following is a seperation technique to seperate potassium chloride and ammonium chloride?<br/>

Question 16 :
During hearing of a court case, the judge suspected that some changes in the document had been carried out. He asked the forensic department to check the ink used at two different places. According to you which technique can give the best results?

Question 17 :
Sublimation can be used to separate a mixture of solids in which:

Question 18 :
A student placed water, sodium chloride, potassium dichromate, sand, chalk, and hydrogen sulfide into a distilling flask and proceeded to distill. What ingredient rather than water would be found in the distillate?

Question 19 :
Wheat flour is separated from wheat bran by the method of:

Question 22 :
The colligative properties of a colloidal solution compared to the solution of non-electrolyte of same concentration will be:

Question 26 :
<blockquote>Amount in g of simple containing 80% NaOH required to prepare 60 litre of 0.5 M solution is :</blockquote>

Question 27 :
What is the percentage of hydrogen by wt.in vitamin $C$ ?

Question 29 :
Assertion: All solutes become more soluble in water at higher temperature. Reason: Solubility of solute depends upon temperature.

Question 30 :
What is the percentage of carbon, by wt. in vitamin $C$ ?

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