Question

(b) Baking soda paste is advised to rub on a beer
3
2. How is litmus obtained ? How would you use a litmus paper to differentiate the given sch
3. What are synthetic indicators ? Name the synthetic indicator that turns red into acidic med 1-
8. SHORT ANSWER TYPE QUESTIONS
1. Why does a turmeric stain turn red when washed with a soap ?
2. Complete the following table :
Effect on turmeric paper
S. No.
Test Solution
Yellow
1
Orange juice
Reddish brown
Milk of magnesia
3. What is a neutralisation reaction ?
4. What is an indicator ?
5. How is acidic soil treated ?
C. LONG ANSWER TYPE QUESTIONS
. Mention two characteristics of each acids, bases and indicators.
dilute hydrochloric acid and ammonium hydroxide ?
LL IN TI
Litmus
A А
China
Phend
TATE
1. Al
2. Ac
ΛΑ
2
4. What is an exothermic reaction ? Give an example,
5. Give reason for the following:
(a) The toothpaste prevents tooth decay.
3
D. CHOOSE THE CORRECT ANSWER
The acid found in spinach is​

Answer 1

Baking Soda is advisable to rub on bee sting because bee sting contains Methanoic/Formic Acid which causes irritation in our skin. Rubbing Baking Soda neutralizes the effect and hence the pain is reduced