Question

Q1. Anisha has been given a Test tube with chemical A. When dil. HCl is added to A it
produces a gas that dissolves in water and turns blue litmus red.
(2m)
i) Identify A
ii) Identify the gas released (it turns lime water milky)

Q2. Riya is suffering from indigestion due to acidity (more acid in stomach). Which of the
following is advisable to give in this situation?

(2 m)
i) Vinegar in warm water
ii) Baking Soda in water
iii) Orange juice
Justify you answer.

Q3. Starting from CuSO4 and a Strong Alkali, how will you obtain Cu (OH)2. If phenolphthalein is
added to the Cu (OH)2, what will be the change? (2m)

Q4. Tina observed Na was stored in kerosene in chemistry laboratory. I) What might be the
reason for the same?
She accidently dropped a piece of it in water...ii) Write a reaction that is expected to take place
due to the accident. ii) What is the nature of the substance formed? (3m)

Q5. Complete the following reactions: (3m)
i) NH4Cl + NaOH
ii)C02 + NaOH
iii) Na + O2

Please help fast

Answer 1

Answer:

q2 answer is baking soda in water