Uses of HCl

Q.

Noble metals like gold and platinum can be dissolved in :

1. Nitric Acid

2. Muriatic Acid

3. Aqua Regia

4. Club Soda

Q.

Hydrochloric acid is secreted in the stomach..

1. True
2. False

Q.

Where is HCl used in the textile industry?

1. For bleaching (of clothes).

2. For drying.

3. For washing.

4. For removing impurities in the fabric.

Q.

Write a note on Aqua Regia? Give one use of it?

Q. Figure 10.2 shows the apparatus used for the preparation of nitric acid by Ostwald's process. [5 MARKS]

(a) What two mistakes do you notice in the arrangement?
(b) Name the reactants.
(c) In what proportion are the reactants taken in this process?
(d) What is the function of platinum gauze in this process?
(e) What is the function of quartz packing in the absorption tower?

Q.

Which of the following is/are the uses of chlorine?

1. Used for bleaching

2. Used for water purification

3. Used in the preparation of insecticides

4. Used for removing stain

Q.

Hydrochloric acid is used to purify

1. table salt

2. rubber

3. metals

4. rice

Q. (a) What is the role of hydrochloric acid in our stomach?
(b) What is the function of enzymes in the human digestive system?

Q. Assertion :Aluminium and zinc metal evolve $H_2$ gas from NaOH solution. Reason: Several non-metals such as P, S, Cl, etc. yield a hydride instead of $H_2$ gas from NaOH.

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. Both Assertion and Reason are incorrect

Q.

Noble metals like gold and platinum can be dissolved in :

1. Nitric Acid

2. Sulphuric Acid

3. Aqua Regia

4. Club Soda

Q.

Where can we find the use of HCl?

1. Refrigerant in ice plants

2. Extraction of glue from bones.

3. Manufacture of washing soda

4. Flavouring foods as vinegar

Q.

Where is dilute hydrochloric acid present in the human body?

1. Liver

2. Stomach.

3. Mouth

4. Small interstine

Q.

Hydrochloric acid is used to purify

1. table salt

2. rubber

3. metals

4. rice

Q.

Bleaching powder is usedfor disinfecting water. Give reason.

Q. Identify the uses of $HCl$.

1. Digestion
2. Pickling
3. Preparing NaCl
4. PVC manufacture
5. Leather tanning
6. Reduce acidity
7. Increase pH
8. Dehydration

Q.

Noble metals like gold and platinum can be dissolved in :

1. Nitric Acid

2. Aqua Regia

3. Sulphuric Acid

4. Club Soda