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Question & Answer Forum

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Syeda answered 1 year(s) , 8 month(s) ago

what is rancidity ? write different methods of preventing rancidity .

Ans: Rancidity: It is defined as chemical decomposition of oils and fats which in another words is spoiling food materials that difficult for consumption.
It can be prevented by following methods:...

Asked by Nikhil

Jun 13

  • 2 Answers
  • 4 Likes
  • 53029 Views
Agam answered 1 year(s) , 6 month(s) ago

How to blance an equation ? (i) Barium chloride + Aluminium sulphate ------> Barium sulphate + Aluminium chloride

Ans: Following steps need to be followed while balancing a chemical equation
1. Write down your given equation.
2. Write down the number of atoms that you have on each side of the equation....

Asked by Raj

Apr 8

  • 5 Answers
  • 2 Likes
  • 40176 Views
Syeda answered 1 year(s) , 8 month(s) ago

"Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate". (1).Translate the above statement into a chemical equation. (2). state two types in

Aluminum sulfate  + Barium chloride → Aluminum chloride + Barium sulfate.
Al 2(SO 4) 3 + 3BaCl 2 ------> 2AlCl 3 + 3BaSO 4
...

Asked by Sabu

Jun 6

  • 2 Answers
  • 1 Like
  • 32879 Views
Satyanarayana answered 4 year(s) , 8 month(s) ago

write the chemical name and formula of bleaching powder. How is it prepared?

Ans: Chemical formula of Bleaching Powder is CaOCl 2 and its Chemical name is Calcium Oxychloride.
It is Prepared by Chlorine gas over dry slaked lime. Generally this method is used in large...

Asked by Sabu

Jun 6

  • 1 Answer
  • 3 Likes
  • 28110 Views
Syeda answered 1 year(s) , 7 month(s) ago

what change in colour is observed when white silver chloride is left exposed to sunlight ? state the type of chemical reaction in this change .also write the equation.

Answer.

When white Silver chloride exposed to sunlight it produces to black metallic colured Silver along with liberation of Chlorine gas.
2AgCl → 2Ag + Cl 2
This is a ph...

Asked by Nikhil

Jun 25

  • 2 Answers
  • 0 Like
  • 27111 Views
Swathi answered 3 year(s) , 8 month(s) ago

Is burning of candle a physical change or a chemical change . why?

When a candle burns, both physical & chemical changes occur.
Physical Changes in Burning Candle: On heating, candle wax melts and form liquid wax. It  is a physical change. Since it again turns into soli...

Asked by Atharv

May 13

  • 1 Answer
  • 0 Like
  • 23253 Views
Ankita answered 11 month(s) , 19 day(s) ago

On heating copper sulphate ( blue colour) crystals turn colourless

The water molecule evaporates so the crystals turn colour less

Asked by Ritika

Sep 25

  • 4 Answers
  • 2 Likes
  • 22044 Views
Swathi answered 3 year(s) , 6 month(s) ago

what is a saponification reaction ?

Saponification:
Esters react in the presence of an acid or a base to give back the alcohol and carboxylic acid. This is called saponification reaction. This is reverse reaction of esteri...

  • 1 Answer
  • 1 Like
  • 19749 Views
Swathi answered 3 year(s) , 6 month(s) ago

A solution reacts with crushed egg-shells to give a gas that turns limewater milky

The solution is HCl.
Egg shells contains calcium carbonate, which on reaction with HCl liberates CO 2 gas which turn lime water to milky.
CaCO 3 + 2HCl → CaCl 2 +...

Asked by P Murali

May 3

  • 1 Answer
  • 3 Likes
  • 18321 Views
Swathi answered 4 year(s) , 8 month(s) ago

Explain electrolysis of water.

Take a glass beaker fix two electrodes. The positive electrode acts as anode &negative electrode act as cathode. Fill 1/3 of beaker with water. Take two test tubes. Insert on electrodes. Observe the level of wa...

Asked by Abhishek

May 13

  • 1 Answer
  • 1 Like
  • 18243 Views
Swathi answered 4 year(s) , 8 month(s) ago

Difference between strong acid and weak acid? Give two examples for each of them

Ans: Strong Acid Weak Acid Strong acids will dissociate completely to produce H + ions.
pH values will be around 0 to 1.
Most of the inorganic a...

Asked by R murali

Jun 7

  • 3 Answers
  • 0 Like
  • 18178 Views
Satyanarayana answered 5 year(s) , 6 month(s) ago

A metal nitrate A on heating gives yellowish brown coloured metal oxide along with brown gas B and a colourless gas C.Aqueous solution of A on reaction with potassium iodide forms a yellowish precipit

Ans: The metal nitrate (A) is Lead nitrate (Pb(NO₃)₂)
On heating it produces Lead oxide, Nitrogen dioxide (B) and oxygen gas (C)
          2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂
O...

Asked by Inu

Jul 27

  • 1 Answer
  • 1 Like
  • 18159 Views
SaiKarthikVarma answered 3 year(s) , 6 month(s) ago

Give some example of combination reaction?

n2+3h2=2nh3

Asked by Rachit Singh

Jul 22

  • 2 Answers
  • 1 Like
  • 17343 Views
Syeda answered 1 year(s) , 8 month(s) ago

Oxidizing and reducing agents

Answer.

2H₂S + SO₂ → 3S + 2H₂O
In the above reaction Sulphur (S) is oxidized and Oxygen (O) is reduced

Asked by Inu

Jul 25

  • 3 Answers
  • 1 Like
  • 15984 Views
Satyanarayana answered 3 year(s) , 7 month(s) ago

What happen when magnesium ribbon burns in air?

Ans:
1). When Magnesium burns air it reacts with oxygen present in air to form magnesium oxide.
2Mg + O 2 →2MgO

2). When lead nitrate reacts with potassium iodide to...

Asked by K Padam

Jun 17

  • 2 Answers
  • 1 Like
  • 15938 Views
Swathi answered 3 year(s) , 8 month(s) ago

You are provided with two container made up of copper and aluminium you are also provided with solutions of dilute HCl , dilute HNO3, ZnCl2 and H2O, in which of the above container will this will be kept?

The solution of dilute HCl, dilute HNO3, ZnCl2 and H2O can be kept in the container made of copper.  Since copper is a less reactive metal and is placed below the hydrogen in activity series. Hence it does not...

Asked by Dinesh

May 13

  • 1 Answer
  • 0 Like
  • 14788 Views
Satyanarayana answered 3 year(s) , 8 month(s) ago

Write the number of covalent bonds in the molecule of butane, C4H10.

Ans: Structural formula of butane (C 4H 10) is : 
CH 3-CH 2-CH 2-CH 3.


Number of Carbon -Carbon bonds = 3...

Asked by Adithyan

Apr 25

  • 1 Answer
  • 1 Like
  • 13877 Views
SUPRAJA answered 3 year(s) , 9 month(s) ago

oxidation and reduction processes occur simultaneously.justify this statement with the help of an example

oxidation and reduction processes occur simultaneously.When an element is oxidesed another element is reduced E.G.-----
Fe 2O 3(s) + 2Al(s) → Al 2O 3(s) +...

Asked by Sabu

Jun 6

  • 2 Answers
  • 2 Likes
  • 13141 Views
Satyanarayana answered 4 year(s) , 1 month(s) ago

Why tap water conducts electricity whereas distilled water does not?

Ans: Tap water contains dissolved salts in it. These salts dissociates into ions when electricity passed through it which are responsible for the electricity conductivity of tap water. But distilled water do

...

  • 3 Answers
  • 0 Like
  • 12825 Views
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