English
Maharashtra State BoardSSC (English Medium) 10th Standard

Give scientific reason. It takes time for pieces of Shahabad tile to disappear in HCl, but its powder disappears rapidly.

Advertisements
Advertisements

Question

Give scientific reason.

It takes time for pieces of Shahabad tile to disappear in HCl, but its powder disappears rapidly.

Explain
Short/Brief Note
Advertisements

Solution

  1. The rate of a chemical reaction depends upon the size of the reactant particles taking part in the reaction.
  2. Smaller the size of the reactant particles, higher is the rate of reaction.
  3. The size of reactant particles is more in pieces of Shahabad tile as compared to powder of Shahabad tile.
  4. When HCl is added to pieces of Shahabad tile, the CO2 effervescence is formed slowly. However, when HCl is added to Shahabad powder, the CO2 effervescence is formed at a faster rate.
    Hence, it takes time for pieces of Shahabad tile to disappear in HCl, but its powder disappears rapidly.
shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Chemical reactions and equations - Write scientific reasons [Page 23]

APPEARS IN

SCERT Maharashtra Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
Chapter 3 Chemical reactions and equations
Write scientific reasons | Q 4. | Page 23
Balbharati Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
Chapter 3 Chemical reactions and equations
Exercise | Q 4. b. | Page 45

RELATED QUESTIONS

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


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 do you mean by a precipitation reaction? Explain giving an example.


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.


What type of reaction is represented by the following equation?

\[\ce{CuSO4 + 2NaOH -> Cu(OH)2 + Na2SO4}\]


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


  1. What happens when an aqueous solution of sodium sulphate reacts with an aqueous solution of barium chloride?
  2. Write the balanced chemical equation for the reaction which takes place.
  3. State the physical conditions of reactants in which the reaction will not take place.
  4. Name the type of chemical reaction which occurs.
  5. Give one example of another reaction which is of the same type as the above reaction.

A red-brown metal X forms a salt XSO4. When hydrogen sulphide gas is passed through an aqueous solution of XSO4, then a black precipitate of XS is formed alongwith sulphuric acid solution.

  1. What could the salt XSO4 be?
  2. What is the colour of salt XSO4?
  3. Name the black precipitate XS.
  4. By using the formula of the salt obtained in (a) above, write an equation of the reaction which takes place when hydrogen sulphide gas is passed through its aqueous solution.
  5. What type of chemical reaction takes place in this case?

Fill in the blank

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


Explain the following type of chemical reaction, giving two examples for it:

Double displacement reaction


The aqueous solutions of copper sulphate and zinc sulphate appear

(A) blue and green respectively

(B) green and colourless respectively

(C) blue and brown respectively

(D) blue and colourless respectively.


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.


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:


Classify the following reaction into – 

  1. Direct combination 
  2. Decomposition
  3. Displacement
  4. Double decomposition

The reaction is – Zinc sulphate reacts with ammonium hydroxide to give ammonium sulphate and zinc hydroxide.


Explain the types of double displacement reactions with examples.


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


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


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

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


In a double displacement reaction ______.


Identify the product which represents the solid state in the above reaction.


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


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.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×