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Questions asked by mosymeow_1
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355
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A one litre flask is full of brown bromine fumes. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
1
answer
A mixture of two salts is not water soluble but dissolves completely in dil. HCl to form a colourless solution. The mixture could be
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
1
answer
Which of the following is soluble in yellow ammonium sulphide?
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
1
answer
An aqueous solution $FeSO_4.Al_2(SO_4)_3$ and chrome alum is heated with excess of $Na_2O_2$ and filtered. The materials obtained are
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
1
answer
Brown ring test is used to detect
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
1
answer
Turn bull's blue is the compound
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
1
answer
A white crystalline substance dissolves in water. On passing $H_2S$ in this solution, a black ppt. is obtained. The black ppt. dissolves completely in hot $HNO_3$. On adding a few drops of conc. $H_2SO_4$, a white ppt. is obtained. The ppt. is that of
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
1
answer
Yellow ammonium sulphide solution is a suitable reagent for the separation of
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
1
answer
Which of the following sol will be destabilised with ionic impurities- if present?
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
1
answer
Which of the following sols cannot be prepared by boiling the dispersed phase with dispersion medium (water)?
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
1
answer
For dissolution of an ionic solid water $\Delta_{sol}H^{\Theta}$ =
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
1
answer
$H_2S$ will precipitate the sulphide of all the metals from the solution of chlorides of Cu, Zn and Cd if
jeemain
chemistry
practical-chemistry
easy
asked
Jan 25, 2014
1
answer
Sometimes yellow turbidity appears while passing $H_2S$ gas even in the absence of II group radicals. This is because
jeemain
chemistry
practical-chemistry
easy
asked
Jan 25, 2014
1
answer
A salt solution is treated with chloroform drops. Then it is shaken with chlorine water. Chloroform layer becomes violet, solution obtains
jeemain
chemistry
practical-chemistry
easy
asked
Jan 25, 2014
1
answer
The salt used for performing bead test in qualitative inorganic analysis is
jeemain
chemistry
practical-chemistry
easy
asked
Jan 25, 2014
1
answer
In $KMnO_4$ titrations the indicator used is
jeemain
chemistry
practical-chemistry
easy
asked
Jan 25, 2014
1
answer
The colour of the dye obtained by coupling benzene diazonium chloride with aniline is
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
1
answer
Coupling of benzene diazonium chloride and aniline is carried out at pH
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
1
answer
Potash Alum is
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
2
answers
Phenol and acetic acid can be differentiated by
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
1
answer
Ethanol & Methanol can be differentiated by
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
1
answer
Alliphatic & aromatic aldehydes can be differentiated by
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
1
answer
Which of the following test is given both by aldehydes and ketones?
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
1
answer
Methyl Salicylate has a smell of
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
1
answer
Lassaigne's test for the detection of nitrogen fails in
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
3
answers
Adsorption is accompanied by
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
In which one of the following, the dispersed phase is a liquid?
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Dalda is prepared form oils by
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Which of the following electrolyte will have maximum flocculation value for $Fe(OH)_3$ sol?
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
An example of autocatalysis is
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
The disperse phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged respectively. Which of the following statements is not correct?
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Identify the gas which is readily adsorbed by activated charcoal
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Which of the following forms cationic micelles above certain concentration?
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
2
answers
The volume of gases $H_2, \;CH_4, \;CO_2$ and $NH_3$ absorbed by 1 gm of activated charcoal at 298 K are in the order:
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
mock
biology
asked
Dec 14, 2013
1
answer
Which doesn't cause coagulation of coagulation of colloidal solution?
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
The concentration of electrolyte required to coagulate a given amount of $As_2S_3$ sol. is minimum in the case of:
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Colloid of which one fo the following can be prepared by electrical dispersion as well as reduction method?
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Arsenic sulhpide is a negative sol. The reagent with least precipitating power is
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Milk is a colloid in which a
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Which one of the following is an example of homogeneous catalysis?
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
The critical micellization concentration(CMC) is
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
The coagulation of $10 cm^3$ of Gold sol is completely preventred by addition of 0.025g of starch to it. The gold number of starch is
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
The ability of ion to bring about coagulation of a given colloidal solution depends upon
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
The stability of the dispersed phase in a lyophobic colloids is due to
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Which of the following method is not employed for the purification of colloids?
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
In the preparation of AgI sol, the excess of $AgNO_3$ is added to potassium iodide solution. The particles of the sol will acquire
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Which of the following process best describes the purification of muddy water by addition of alum?
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
A sol has positively charged colloidal particles. Which of the following solutions is required in lowest concentration for coagulation?
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Hydrophillic colloids are stable due to
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
Point out the incorrect statement
jeemain
aipmt
chemistry
surface-chemistry
class12
unit5
easy
biology
asked
Dec 14, 2013
1
answer
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