CBSE Class 10 Chemical Study Chemical Properties of HCl Acid And NaoH Worksheet Set 02

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STUDY OF CHEMICAL PROPERTIES OF HCl ACID & NaOH
 
• Objective: To carry out reactions of Hydrochloric acid and NaOH with: (a) Blue / red litmus, (b) Zn Metal, and (c) Sodium Bicarbonate.
 
• Requirement: Test tubes, litmus papers, Zn granule, solid NaHCO3, match box, dil. HCl acid, dil. NaOH solution, etc.
 
• Procedure: Take one test tube full of dil HCl acid and keep it on one end of the test tube rack for further use.

 CBSE Class 10 Chemical Study Chemical Properties of HCl Acid And NaoH Worksheet Set B 1

• Procedure: Take one test tube full of NaOH solution and keep it on one end of the test tube rack for further use.

CBSE Class 10 Chemical Study Chemical Properties of HCl Acid And NaoH Worksheet Set B 2

CBSE Class 10 Chemical Study Chemical Properties of HCl Acid And NaoH Worksheet Set B 3

• Precautions:
 
1. For best result use a small amount of chemicals as possible.
 
2. Students should not handle solid NaOH with bare hands as it is very corrosive in nature.
 
• Questions:
 
1. What is a base? (A substance which reacts with acids to form salt and water as the only product is called a base)
 
2. What is an alkali? (A soluble base, which furnishes OH— ions when dissolved in water, is called an alkali.)
 
3. Classify the following as acids and bases: (HCl, NaOH, KOH, HNO3)
 
4. Name the products formed when:
 
a. Al metal is heated with NaOH? (Sodium aluminate and Hydrogen gas)
 
b. Zn powder is warmed with NaOH? (Sodium zincate and hydrogen gas)
 
• Multiple choice type questions
 
1. When dilute HCl is added to slid sodium carbonate , it is observed that
 
a) No change takes place
b) A popping sound is produced
c) Brisk effervescence occurs
d) The solution turns blue.
 
2. A teacher gave two test tubes, one containing water and other containing sondium hydroxide solution to the students and asked them to identify the test tube containing sodium hydroxide solution. Which one of the following can be used for correctly identifying that:
 
a) Blue litmus
b) Red litmus
c) Sodium carbonate
d) Dilute HCl
 
3. The following pairs of substances are available in the laboratory.
 
1 )Zn &dil HCl   2)Zn & dil NaOH c) NaHCO3 & dil HCl
 
Which of these can be used to produce a colour less & odour less gas which gives a pop sound on burning
 
a) 1 only
b) 2 only
c) 1 and 2
d) 1 and 3
 
4. What happens when Na2CO3 is added to NaOH?
 
a) CO2 is evolved
b) No reaction takes place
c) NaHCO3 is formed
d) None of these
 
5. A student added Zn granules to dil HCl, a colourless odourless gas was evolved which was tested with a burning match stick. It was observed that
 
a) The match stick continued to burn brilliantly.
b) The match stick burned slowly with blue flame.
c) The match stick extinguished and the gas burned with a pop sound.
d) The match stick burned with an orange flame.
 
6. Which of the following is used to make litmus paper?
 
a) Algae
b) Fungi
c) Lichens
d) Bacteria
 
7. Four drops of red litmus solution were added to each one of the following substances. Which one turns red litmus solution blue?
 
a) Alcohol
b) Distilled water
c) NaOH solution
d) HCl
 


Please click on below link to download CBSE Class 10 Chemical Study Chemical Properties of HCl Acid And NaoH Worksheet Set B

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