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Shilpi98
@shilpi98
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Joined: Dec 29, 2021
Last seen: Mar 10, 2022
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Topics: 2165 / Replies: 0
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Topic
Which of the ores can be concentrated by magnetic separation method?
4 years ago
Forum
Isolation of Elements
Replies: 0
Views: 162
Topic
The length of the latus rectum of a parabola, whose vertex and focus are on the positive x–axis at a distance R and S (>R) respectively from the origin, is
4 years ago
Forum
Maths
Replies: 0
Views: 332
Topic
If the following system of linear equations 2x + y + z = 5 x – y + z = 3 x + y + az = b has no solution, then:
4 years ago
Forum
Maths
Replies: 0
Views: 80
Topic
cosec 18° is a root of the equation
4 years ago
Forum
Maths
Replies: 0
Views: 108
Topic
If p and q are the lengths of the perpendiculars from the origin on the lines, x cosec α – y sec α = kcot 2α and x sin α + y cosα = k sin 2α respectively, then k2 is equal to :
4 years ago
Forum
Maths
Replies: 0
Views: 181
Topic
Comment on the statement that "colloid is not a substance but a state of substance".
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 166
Topic
Explain the terms with suitable examples: (i) Alcosol (ii) Aerosol (iii) Hydrosol
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 158
Topic
Give four uses of emulsions.
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 91
Topic
Give four uses of emulsions.
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 107
Topic
Explain the following terms: (i) Electrophoresis (ii) Coagulation (iii) Dialysis (iv) Tyndall effect.
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 108
Topic
What is shape selective catalysis?
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 115
Topic
Describe some features of catalysis by zeolites.
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 95
Topic
What do you mean by activity and selectivity of catalysts?
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 94
Topic
Give four examples of heterogeneous catalysis.
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 103
Topic
Action of soap is due to emulsification and micelle formation. Comment.
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 111
Topic
What is demulsification? Name two demulsifiers.
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 94
Topic
What are emulsions? What are their different types? Give example of each type.
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 150
Topic
Explain what is observed (i) When a beam of light is passed through a colloidal sol. (ii) An electrolyte, NaCl is added to hydrated ferric oxide sol.
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 167
Topic
How are colloids classified on the basis of (i) Physical states of components (ii) Nature of dispersion medium and
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 126
Topic
What are enzymes? Write in brief the mechanism of enzyme catalysis.
4 years ago
Forum
Surface Chemistry
Replies: 0
Views: 161
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