P-1 Lenses — Science STD 10 — Question

Polyethylene is a homopolymer.

Name the spherical mirror which can produce a virtual and diminished image of an object.

Write the functions of the following: Ovary.

What is done so to prevent rusting or iron windows and iron doors of your house?

How does binary fission differ from multiple fission?

Rewrite the following statements after correction, if necessary:

1. Elements in the same period have equal valency.
2. The metallic character of elements in a period increases gradually on moving from left to right.

Give reason for the following:
Silver, gold and platinum are used to make jewellery.

When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what the following are examples of:
The smell of the food.

What are the upper parts of the heart called?

What happens when magnesium reacts with very dilute nitric acid ? Write an equation for the reaction involved.