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Pooja
Subject: Chemistry
, asked on 10/9/17
The number of moles of hydrogen in o.224 litrs of hydrogen gas at STP
Answer
1
Sudeshna Panigrahi
Subject: Chemistry
, asked on 24/8/17
why is Cu
2
S called copper glance? plz answer fast....
Answer
1
Aishwarya Trivedi
Subject: Chemistry
, asked on 15/8/17
please answer
Answer
2
Aishwarya Trivedi
Subject: Chemistry
, asked on 15/8/17
please answer
Answer
2
Aishwarya Trivedi
Subject: Chemistry
, asked on 15/8/17
please answer
Answer
1
Aishwarya Trivedi
Subject: Chemistry
, asked on 15/8/17
please answer
Answer
2
Aishwarya Trivedi
Subject: Chemistry
, asked on 15/8/17
please answer
Answer
1
Aishwarya Trivedi
Subject: Chemistry
, asked on 15/8/17
please answer
Answer
1
Aishwarya Trivedi
Subject: Chemistry
, asked on 14/8/17
correct option please?
Brine is electrolysed by using inert electrodes.The reaction at anode is.......................
Answer
1
Aishwarya Trivedi
Subject: Chemistry
, asked on 14/8/17
Question 8 of 90
Zone refining is based on the principle that ______.
1. Impurities of low boiling metals can be separated by distillation.
2. Impurities are more soluble in molten metal than in solid metal.
3. Different components of a mixture are differently absorbed on an absorbent.
4. Vapours of volatile compound can be decomposed in pure metal .
Answer
1
Aishwarya Trivedi
Subject: Chemistry
, asked on 14/8/17
Question 7 of 90
What is the role of aniline or cresol when added in a froth floatation process ?
1. Promoter
2. Stabilizer
3. Depressant
4. Wetting agent
Correct option please ?
Answer
1
Aishwarya Trivedi
Subject: Chemistry
, asked on 14/8/17
Question 6 of 90
Which of the following electrolyte will have maximum flocculation value for Fe (OH)
3
sol. ?
1. Na
2
S
2. (NH
4
)
3
PO
4
3. K
2
SO
4
4. NaCl
Correct option please ?
Answer
1
Aishwarya Trivedi
Subject: Chemistry
, asked on 14/8/17
When copper ore is mixed with silica in a reverberatory furnace, copper matte is produced. Copper matte contains
1. sulphides of copper (II) and ion (II)
2. sulphides of copper (II) and ion (III)
3. sulphides of copper (I) and ion (II)
4. sulphides of copper (II) only
correct option please ?
Answer
2
Aishwarya Trivedi
Subject: Chemistry
, asked on 14/8/17
Q. ............. is used to make interpretations and predict which element will suit as the reducing agent for the given metal oxide.
1. Enthalpy
2. Entropy
3. Gibbs free energy
4. Specific heat
Answer
1
Aishwarya Trivedi
Subject: Chemistry
, asked on 14/8/17
Q. Which of the following ions is most effective in the coagulation of a colloid with the negative charge ?
1. K+
2. Mg
2+
3. AI
3+
4. Ca
2+
Answer
3
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What are you looking for?
Brine is electrolysed by using inert electrodes.The reaction at anode is.......................
Zone refining is based on the principle that ______.
1. Impurities of low boiling metals can be separated by distillation.
2. Impurities are more soluble in molten metal than in solid metal.
3. Different components of a mixture are differently absorbed on an absorbent.
4. Vapours of volatile compound can be decomposed in pure metal .
Question 7 of 90
What is the role of aniline or cresol when added in a froth floatation process ?
1. Promoter
2. Stabilizer
3. Depressant
4. Wetting agent
Correct option please ?
Which of the following electrolyte will have maximum flocculation value for Fe (OH)3 sol. ?
1. Na2S
2. (NH4)3PO4
3. K2SO4
4. NaCl
Correct option please ?
1. sulphides of copper (II) and ion (II)
2. sulphides of copper (II) and ion (III)
3. sulphides of copper (I) and ion (II)
4. sulphides of copper (II) only
correct option please ?
1. Enthalpy
2. Entropy
3. Gibbs free energy
4. Specific heat
Q. Which of the following ions is most effective in the coagulation of a colloid with the negative charge ?
1. K+
2. Mg2+
3. AI3+
4. Ca2+