Bleaching Powder

Q. ${\mathrm{CaOCl}}_2$ is the product formed due to the reaction between calcium hydroxide and ___ and is commonly known as ___.

1. hydrogen, washing soda
2. hydrochloric acid, baking soda
3. chlorine, bleaching powder
4. hydrochloric acid, baking powder

Q.

What will happen if a solution of Sodium hydrogen carbonate is heated? Give the equation of the reaction involved.

Q.

What is the chemical name of quick lime?

1. Calcium carbonate

2. Calcium hydroxide

3. Carbon dioxide

4. Calcium oxide

Q. Which of the given dilute acids react with bleaching powder to release chlorine gas?

1. Sulphuric acid
2. Nitric acid
3. Hydrochloric acid
4. Acetic acid

Q. What volume of rubbing alcohol is required to add in water to prepare $250$ mL of $70\%$ (v/v) solution?

1. $125$ mL
2. $150$ mL
3. $175$ mL
4. $200$ mL

Q.

How is Sodium hydrogen carbonate used as an antacid?

Q.

State the chemical property on which the use of baking soda is based as an antacid.

Q. How to know the chemical formula of a compound?

Q. Which of the following compounds is used to cure acidity?

1. Sodium sulphate
2. Sodium bicarbonate
3. Calcium oxychloride
4. Sodium chloride

Q. amino acid (1mole)\xrightarrow[△]{NaOH+CaO}gas evolved\xrightarrow[{}]{pass through lime water}salt(0.1999 kg) amino acid having i.2 -NH2 gr. ii.1 -COOH gr iii.2 -COOH gr how to deal with such problem? iv.3 -COOH gr

Q.

Write down the uses of Baking Soda.

Q. Bleaching powder gets its disinfectant property from the chlorine gas evolved during its decomposition.

1. True
2. False

Q.

Name the drying agent used in the lab during the preparation of a gas, formed by the reaction of sodium chloride and sulphuric acid?

1. Concentrated sulphuric acid

2. Nitric acid

3. Ammonium chloride

4. Dilute sulphuric acid

Q.

Soap forms insoluble precipitates with calcium and magnesium ions present in hard water. True or False?

1. True

2. False

Q. Substance A is yellowish-white in colour and releases chlorine gas on reaction with dilute hydrochloric acid. The substance A is _______.

1. common salt
2. washing soda
3. baking soda
4. bleaching powder

Q. Identify the product 'P' formed in the given reaction.
${\text{CaOCl}}_2\text{(s)}+{\text{H}}_2{\text{SO}}_4\text{(aq)}\to \text{P}+{\text{Cl}}_2\text{(g)}+{\text{H}}_2\text{O}\text{(l)}$

1. ${\text{CaCO}}_3$
2. ${\text{SO}}_2$
3. ${\text{CaSO}}_4$
4. ${\text{CaCl}}_2$

Q.

Which of the following salt is used as an antacid?

1. Potassium nitrate

2. Copper sulphate

3. Sodium bicarbonate

4. Potash alum

Q. Which of the following should be used as a disinfectant?

1. ${\text{Na}}_2{\text{CO}}_3$
2. ${\text{CaOCl}}_2$
3. ${\text{NaHCO}}_3$
4. $\text{NaCl}$

Q.

Give the uses of different salts.

Q.

Question 2

(a) What are the uses of products obtained from the chloralkali process?

(b) What happens if we pass an electric current through a saturated solution of sodium chloride?

Q. Question 39.
In one of the industrial processes 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 equation of the reactions involved.

Q.

Write the equation for the reaction of hydrochloric acid with bleaching powder?

Q. Match the following with their common uses.

1. Palladium
2. Carbon
3. Sulphuric acid

Q. Question 21.4
Complete the missing component/variable given as x in the following reaction:

${\text{CaCO}}_3\text{(s)}\stackrel{\text{x}}{\to }\text{CaO(s)}+{\text{CO}}_2\text{(g)}$

Q.

Write down the uses of Baking Soda.

Q. Match the following with their common uses.

1. Palladium
2. Carbon
3. Sulphuric acid

Q.

The drying agent used conventionally (conc $H_{2}S{O}_4$) can be replaced by quicklime & phosphorous pentoxide.

1. False

2. True

Q. Calculate the amount of lime that can be produced by heating 100 g of 90% pure limestone:

1. 50.4 g
2. 0.9 mol
3. 56 g
4. 0.98 mol

Q. What is the common name of the compound CaOCl2 Name the substance which on treatment with chlorine yields bleaching powder

Q. The simplest formula of bleaching powder is:

1. $Ca\left(OC{l}_2\right)$
2. $CaOC{l}_2$
3. $CaOC{l}_2.H_{2}O$
4. $Ca\left(OC{l}_2\right).2H_{2}O$