हिंदी

When the substance ‘A’ is added to a solution of BaSO4, a yellow precipitate is formed. - Science and Technology 1

Advertisements
Advertisements

प्रश्न

When the substance ‘A’ is added to a solution of BaSO4, a yellow precipitate is formed.

  1. What do you think substance A is likely to be?
  2. Name the precipitate.
  3. Which type of reaction is this?

उत्तर

(a) The substance 'A' is potassium chromate (K2Cr07

(b) The name of the yellow precipitate is barium chromate (BaCr04).

(c) The type of chemical reaction is double displacement.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2012-2013 (March)

APPEARS IN

संबंधित प्रश्न

Complete the following reaction, balance it and write the name of the products CuO + HCI →_________ + _________


Give an example of a double displacement reaction other than the one given in the following Activity.
•Take about 3 mL of sodium sulphate
solution in a test tube.
• In another test tube, take about 3 mL of
barium chloride solution.
• Mix the two solutions given in the following fig.
• What do you observe?


Write the balanced chemical equation for the following and identify the type of reaction. 

\[\ce{Potassium bromide (aq) + Barium iodide (aq) -> Potassium iodide (aq) + Barium bromide (s)}\]


What is the difference between displacement and double displacement reactions? Write equations for these reactions.


What is observed when a solution of sodium sulphate is added to a solution of barium chloride taken in a test tube? Write equation for the chemical reaction involved and name the type of reaction in this case.


 Give two characteristics of the chemical reaction which occurs on adding potassium iodide solution to lead nitrate solution.


What type of chemical reaction is represented by the following equation?

PQ + RS → PS + RQ

 


What type of reaction is represented by the following equation?

CuSO4 + 2NaOH → Cu(OH)2  + Na2SO4


What is meant by double displacement reaction? Explain with help of one example.


What happens when silver nitrate solution is added to sodium chloride solution?
 Name the type of reaction involved.


A metal X forms a water soluble salt XNO3. When an aqueous solution of XNO3 is added to common salt solution, then a white precipitate of compound Y is formed alongwith sodium nitrate solution. Metal X is said to be the best conductor of electricity and it does not evolve hydrogen when put in dilute hydrohloric acid.
(a) What is metal X?
(b) What is salt XNO3?
(c) Name the compound Y.
(d) Write the chemical equation of the reaction which takes place on reacting XNO3 solution and common salt solution giving the physical states of all the reactants and products. 
(e) What type of chemical reaction is illustrated by the above equation?


Fill in the blank

In the type of reaction called ....................................., ions two compounds exchange their positive and negative radicals ions respectively.


Solutions of copper sulphate, iron sulphate and zinc sulphate are prepared and marked I, II and III respectively. Few pieces of aluminium are added to each solutions. After some time a change will be observe in

(A) I and II

(B) II and III

(C) III and I

(D) All the three


(i) What is observed when a solution of potassium iodide is added to a solution of lead nitrate taken in a test tube?
(ii) What type of reaction is this?
(iii) Write a balanced chemical equation to represent the above reaction.


Choose and write the correct option.

What is the type of the following reaction?

BaCl+ ZnSO4 →  BaSO4 + ZnCl2


Study the following chemical reaction and answer the questions given below:

\[\ce{AgNO3_{(aq)} + NaCl_{(aq)} -> \underset{(Precipitate)}{AgCl_{(s)}}↓ + NaNO3_{(aq)}}\]

  1. Identify and write the type of chemical reaction.
  2. Write the definition of the above type of chemical reaction.
  3. Write the names of the reactants and products of the above reaction.

If sodium chloride is added to the silver nitrate solution:

a. which precipitate is formed?
b. name the type of reaction.
c. write the chemical equation.


Choose the correct option from given alternative: 
When hydrogen sulphide gas is passed through a blue solution of copper sulphate, a black precipitate of copper sulphide is obtained and the sulphuric acid so formed remains in the solution. The reaction is an example of a:


Choose the correct option from given alternative: 
In a double displacement reaction such as the reaction between sodium sulphate solution and barium chloride solution:
(A) exchange of atoms takes place
(B) exchange of ions takes place
(C) a precipitate is produced
(D) an insoluble salt is produced


Differentiate between displacement reaction and a neutralization reaction.


Which of the following represents a precipitation reaction?


The following reaction is an example of:

\[\ce{4NH3_{(g)} + 5O2_{(g)} -> 4NO_{(g)} + 6H2O_{(g)}}\]

(i) displacement reaction

(ii) combination reaction

(iii) redox reaction

(iv) neutralisation reaction


Which among the following is (are) double displacement reaction(s)?

(i) \[\ce{Pb + CuCl -> PbCl2 + Cu}\]

(ii) \[\ce{Na2SO4 + BaCl2 -> BaSO4 + 2NaCl}\]

(iii) \[\ce{C + O2 -> CO2}\]

(iv) \[\ce{CH4 + 2O2 -> CO2 + 2H2O}\]


Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of reaction involved?

(i) Displacement reaction

(ii) Precipitation reaction

(iii) Combination reaction

(iv) Double displacement reaction


In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?


Balance the following chemical equation and identify the type of chemical reaction.

`"TiCl"_4("l") + "Mg"("s") -> "Ti"("s") + "MgCl"_2("s")`


Add potassium chromate (K2CrO4) into the solution of barium sulphate (BaSO4).

  1. What was the colour of the precipitate formed? Also, write the name of the precipitate.
  2. Write down the balanced equation for this reaction.
  3. Will you call this reaction a displacement reaction or a double displacement reaction? Why?

A chemical reaction in which exchange of ions occurs between the reactants is known as ______.


Write balanced chemical equation for the following word equation.

Lead nitrate + Potassium iodide → Lead iodide + Potassium nitrate

Is this a double displacement reaction? Justify your answer. Name the compound precipitated and write the ions present in it.


Give scientific reason.

While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.


Give an example of a double displacement reaction.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×