Soaps

Q. Question 14
In the soap micelles
(a) The ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster.
(b) Ionic end of soap is in the interior of the cluster and the carbon chain is out of the cluster.
(c) Both ionic end and carbon chain are in the interior of the cluster.
(d) Both ionic end and carbon chain are on the exterior of the cluster.

Q. Assertion (A): A sample of solid sodium carbonate decahydrate $({\mathrm{Na}}_2{\mathrm{CO}}_3.10H_{2}O)$ would lose mass if exposed to air.

Reason (R): Washing soda gets converted to anhydrous sodium carbonate due to the property of efflorescence.

1. Both (A) and (R) are true, and (R) is correct explanation of (A).
2. (A) is true but (R) is false.
3. (R) is true but (A) is false.
4. Both (A) and (R) are true, and (R) is not correct explanation of (A).

Q. $H_{2}S{O}_4$ is an example of antacid that helps in reducing the acidity in stomach.

1. False
2. True

Q. hat will be the rate of appearance of brown colour in apple if 4 slices are kept in water, open air, lemon solution and salt solution respectively?

Q. Salt 'A' is commonly used in baking.On heating it forms another salt 'B' which is used for removing permanent hardness of water and a gas 'G' which turns lime water milky. Gas 'G' reacts with lime water to form a salt 'C' which is insoluble in water. Salts A, B and C respectively are

1. $N{a}_{2}C{O}_3,CaC{O}_3\text{and}NaHC{O}_3$
2. $N{a}_{2}C{O}_3,NaHC{O}_3\text{and}CaC{O}_3$
3. $NaHC{O}_3,N{a}_{2}C{O}_3\text{and}CaC{O}_3$
4. $CaC{O}_3,NaHC{O}_3\text{and}N{a}_{2}C{O}_3$