Bleaching Powder

Q. A gas X reacts with lime water and forms a compound Y which is used as a bleaching agent in the chemical industry. Identify X and Y.

Q. Question 1
What is the common name of the compound ${\text{CaOCl}}_2$?

Q. In one of the industrial processes used for manufacture of sodium hydroxide, a gas X is formed as by product. The gas X reacts with lime water to give a compound Y which is used as a bleaching agent in chemical industry. Identify X and Y giving the chemical equations of the reactions involved​.

Q. What is the chemical formula of Mica?

Q. Bleaching powder on reaction with dilute hydrochloric acid releases hydrogen gas$\left(H_2\right)$.

1. True
2. False

Q. Which of the following chemicals is used in etching of glass?

1. Hydrogen Fluoride
2. Calcium carbonate
3. Hydrochloric acid
4. Calcium hydroxide

Q. Calcium Phosphate in teeth is acidic or basic in nature?

Q.

Which of the following is used for disinfecting drinking water to make it free from germs?

1. O₂

2. NaHCO₃

3. CaOCl₂

4. CO₂

Q.

Which of the following is treated with chlorine to obtain bleaching powder ?

(a) $CaS{O}_4$

(b) $Ca(OH{)}_2$

(c) $Mg(OH{)}_2$

(d) $KOH$

Q. Name the raw materials that are required for the manufacturing process of washing soda by solvay process. Describe the chemical reaction involved in this process

Q.

(a) What is bleaching powder? How is bleaching powder prepared? Write the chemical equation of the reaction involved in the preparation of bleaching powder.

(b) What happens when bleaching powder reacts with the dilute sulphuric acid? Give the equation of the reaction involved.

(c) State two important uses of bleaching powder.

Q.

What is the chemical formula of slaked lime?

1. NaOH

2. Ca(OH)₂

3. Na₂CO₃

4. NaHCO₃

Q. is the chemical formula of bleaching powder.

1. ${\text{CaCO}}_3$
2. ${\text{Ca(OH)}}_2$
3. ${\text{Ca(NO}}_3{)}_2$
4. ${\text{CaOCl}}_2$
5. $\text{CaO}$
6. ${\text{CaCl}}_2$

Q. Question 28
Which of the following represents saponification reaction?
(a) $C{H}_{3}COONa+NaOH\stackrel{CaO}{\to }C{H}_4+N{a}_{2}C{O}_3$
(b) $C{H}_{3}COOH+C_2{H}_{5}OH\stackrel{H_{2}S{O}_4}{\to }C{H}_{3}COO{C}_2{H}_5+H_{2}O$
(c) $2C{H}_{3}COOH+2Na\to 2C{H}_{3}COONa+H_2$
(d) $C{H}_{3}COO{C}_2{H}_5+NaOH\to C{H}_{3}COONa+C_2{H}_{5}OH$

Q.

A white powdery substance having a strong smell of chlorine is used for disinfecting drinking water supply at waterworks. Identify the substance. Give its chemical name and write the chemical reaction for its preparation.

Q.

What is the formula for Iron oxide and copper chloride?

Q.

Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal of hardness of water, and a gas C is evolved. The gas C, when passed through lime water, turns it milky. Identify A, B, and C.

Q. Question 32
Match the important chemicals given in Column I with the chemical formulae given in Column II.

Q.

What happens when crystals of washing soda are left open in dry air ? What is this change named as ? Name two industries based on use of washing soda.

Q. Uses of bleaching powder is/are:

1. It is used as a disinfectant in sterilization of water
2. It is used to bleach straw, ivory
3. It is used as an oxidising agent in industry
4. It is used for making wool unshrinkable

Q. Which of the following is/are true regarding bleaching powder?

1. It is used to manufacture chloroform.
2. It is used for disinfecting drinking water.
3. It is used as additive in the food.
4. It is used as oxidizing agents.

Q. Question 32
Match the important chemicals given in Column I with the chemical formulae given in Column II.

Q. The uses of bleaching powder are:

1. it is used as an oxidizing agent in chemical industries
2. all of the above
3. it is used for bleaching cotton
4. it can be used for disinfecting water

Q. (a) What is the chemical name of bleaching powder?
(b) What is the chemical formula of bleaching powder?
(c) What are the materials used for the preparation of bleaching powder?
(d) State one use of bleaching powder (other than bleaching).

Q. a substance X is produced by using the product of chlor-alkali process as a raw material it is treated with HCL and further reacted with carbon dioxide gas and ammonia gas which is added for faster cooking. Name the substance X. Z is further mixed with Y and the mixture is added while baking bread and cakes. Name the mixture obtained on mixing Z and Y. Write the reaction involved when Z is heated during cooking. Name all the substances X, Y, Z.
please solve this question as it was asked in my test hence multiple question s are asked

Q. Assertion :Chlorine reacts with freshly prepared calcium hydroxide to produce bleaching powder. Reason: Bleaching powder is used as a disinfectant

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Q.

240(b). What happens when Chlorine is passed through slaked lime?

Q.

What is the chemical formula of slaked lime?

1. $\text{NaOH}$

2. ${\text{Ca(OH)}}_2$

3. ${\text{Na}}_2{\text{CO}}_3$

4. ${\text{NaHCO}}_3$

Q. Oxidation number of $Cl$ in ${CaOCl}_2$ (bleaching powder) is:

1. zero, since it contains ${Cl}_2$
2. $-1$, since it contains ${Cl}^{-}$
3. $-1$, since it contains ${ClO}^{-}$
4. $+1$ and $-1$ since it contains ${ClO}^{-}$ and ${Cl}^{-}$

Q.

(a) Name a sodium compound used for softening hard water.

(b) Which compound of calcium is used for disinfecting drinking water supply?

(c) Name a metal compound which has detergent properties (cleansing properties).

(d) Name one compound of calcium which is used for removing the colour of a coloured cloth.

(e) State a peculiar (or remarkable) property of plaster of Paris.

(f) Name the substance obtained by the action of chlorine on solid (dry) slaked lime.