Question bank [2022] — Science STD 10 — Question

Explain: Mechanism of micelle formation.###Explain the effect of soap in cleansing action.###Explain the mechanism of cleansing action of soap.

Explain the extraction of metals in the middle of the reactivity series.

You observed trait of earlobe whether they are free or attached in four different couples, along with their children.
(1) Couple has all the children with free ear- lobe even mother has attached earlobe. What do you think about father's earlobe?
(2) Couple has children with 1 : 1 ratio for free and attached earlobe. What do you think about their father-mother for this trait?
(3) In a couple, both father and mother have attached earlobe. What do you think about their children?
(4) A couple has four children, out of which three have free earlobe and one has attached earlobe. What do you think about their parents?

Write a short note on baking soda (NaHCO₃).

What are hydrocarbon compounds? Explain its classification.

A straight current-carrying conductor is placed in a magnetic field such that its length is perpendicular to the field. Name and state the rule used to find the direction of the force acting on the conductor. Also draw the necessary diagram.

Draw a neat labelled diagram of the human eye and explain the working of each part of it.

Explain human respiratory system with figure.

What are structural isomers? Give examples.