Question

CHEMISTRY

1. Name the acid present in: a tamarind b. vinegar c. Tomato
2. 15 ml of water and 10 ml of sulphuric acid are to be mixed in a beaker
State the method to be followed with reason.
What is the process called as?
3. Explain how antacids work.
4. Explain the action of dilute sulphuric acid on the following with chemical equation:
i. Magnesium ribbon ii. Sodium Hydroxide iii. Crushed egg shells
5. State reason for the following:
i. Tap water conducts electricity but distilled water does not.
ii. Dry HCl gas does not turn blue litmus red whereas dilute HCl does.
6. A student detected pH of 4 solutions A,B,C and D as 11,5,7 and 2 respectively.Predict the nature of the following:
7. How will you test the gas which is liberated when Dilute HCl rects with an active metal. Eplain.
8. Identify the acid and the base whose combination form you use in your food. Write its name and formula and the
source it is obtained from.
9. Explain why hydrochloric acid is a strong acid while acetic acid is a weak acid. How can it be verfied?
10. A student dropped a few pieces of marble ir a dil HCl, tontained in a test tube. The gas evolved is passed through
lime water? What will happen if the gas is passed in excess? With the help of equation explain all the changes
involved
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Answer 1

Answer:

A citrus acid

B acetic acid

C maleic acid