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Khushboo
Subject: Chemistry
, asked on 11/6/17
What is the difference between FeO + O2 → Fe2O3 and Fe + O2 → Fe2O3?
Answer
1
Khushboo
Subject: Chemistry
, asked on 11/6/17
Fe + O2 →?
Answer
2
Khushboo
Subject: Chemistry
, asked on 11/6/17
FeO + O
2
→ ?
Answer
2
Sristy Choudhary
Subject: Chemistry
, asked on 9/4/17
Is combustion of hydrocarbons a exothermic or an endothermic process ?
({Energy is supplied for the combustion of hydrocarbons (coal , petroleum , petrol , kerosene , etc) as well as released after combustion (or during combustion)} )
Answer
1
Sristy Choudhary
Subject: Chemistry
, asked on 9/4/17
In an
exothermic reaction
, internal energy of reactants is greater than internal energy of the products and therefore, change in the energy will be negative. It is represented as
Reactants + Energy
→
Products
In
an endothermic reaction
, the internal energy of reactants is less than the internal energy of the products. It is represented as
Reactants
→
Products + Energy
Energy released or absorbed is measured in kilocalories or kilojoules.
1. Is it true that
in an exothermic reaction
reactants + energy forms products
or will it be
reactants form products and energy
?
2.
Please explain the graph in the context
Answer
3
Sristy Choudhary
Subject: Chemistry
, asked on 9/4/17
State true or false in these statements giving clear straight forward reason
A.
○
In electroplating highly reactive metal should be made cathode and least reactive metal should be made anode.
B.
○
In electroplating highly reactive metal should be made anode and least reactive metal should be made
cathode.
C.
○
The electrolyte must be acidulated with some acid containing negative ions so as to prevent hydrolysis.
D.
○
This technique is used for preventing the corrosion of metals.
Answer
2
Sristy Choudhary
Subject: Chemistry
, asked on 8/4/17
Why are cathodic and anodic regions formed when an iron rod is kept in the presence of moisture ?
IN Ch PHYSICAL AND CHEMICAL CHANGES
in topiC Oxidation & Reduction REACTIONS THE 2ND VIDEO STATING ELECTROCHEMICAL THEORY
}
Answer
1
Ak
Subject: Chemistry
, asked on 9/7/16
A gas which dissolves in ammonical cuprous chloride solution
Answer
1
Padmini
Subject: Chemistry
, asked on 17/11/17
Which all substances can be
precipitates
in a reaction?
Answer
3
Ruchika Surana
Subject: Chemistry
, asked on 21/9/17
Rusting is what type of change?
Answer
7
Ruchika Surana
Subject: Chemistry
, asked on 20/9/17
Why addition of zinc to dilute HCl acid is a chemical change
Answer
2
Aaditya Singh
Subject: Chemistry
, asked on 14/9/17
Why does clouds are formed in liquid when we add a amount of 'dettol' in it .
Plz ans fast
Answer
3
Vansh Tevatia
Subject: Chemistry
, asked on 5/9/17
What is used in a volcano experiment
Answer
1
Vansh Tevatia
Subject: Chemistry
, asked on 5/9/17
Silica gel can be used as an
Answer
2
Dhruv
Subject: Chemistry
, asked on 29/8/17
Give a balanced equation for a direct combination reaction involving:
a) Two elements – one of which is a neutral gas and the other a yellow non-metal
b) Two elements – one of which is a neutral gas and the other a monovalent metal
c) Two compounds – resulting in formation of a weak acid
Answer
1
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Next
What are you looking for?
({Energy is supplied for the combustion of hydrocarbons (coal , petroleum , petrol , kerosene , etc) as well as released after combustion (or during combustion)} )
Reactants + Energy Products
Reactants Products + Energy
1. Is it true that in an exothermic reaction
2. Please explain the graph in the context
A. In electroplating highly reactive metal should be made cathode and least reactive metal should be made anode.
B. In electroplating highly reactive metal should be made anode and least reactive metal should be made
cathode.
C. The electrolyte must be acidulated with some acid containing negative ions so as to prevent hydrolysis.
D. This technique is used for preventing the corrosion of metals.
IN Ch PHYSICAL AND CHEMICAL CHANGES
in topiC Oxidation & Reduction REACTIONS THE 2ND VIDEO STATING ELECTROCHEMICAL THEORY}
Plz ans fast
a) Two elements – one of which is a neutral gas and the other a yellow non-metal
b) Two elements – one of which is a neutral gas and the other a monovalent metal
c) Two compounds – resulting in formation of a weak acid