SSLC (English Medium) Class 9 - Tamil Nadu Board of Secondary Education Question Bank Solutions

According to cartesion sign convention, which mirror and which lens has negative focal length?

Name the mirror(s) that can give (i) an erect and enlarged image, (ii) same sized, inverted image

Concave mirrors are used by dentists to examine teeth. Why?

Pick out the concave and convex mirrors from the following and tabulate them.

Rear-view mirror, Dentist’s mirror, Torchlight mirror, Mirrors in shopping malls, Make-up mirror.

Ceres is a______.

The period of revolution of planet A around the Sun is 8 times that of planet B. How many times is the distance of planet A as great as that of planet B?

State whether true or false. If false, correct the statement.

Halley’s comet appears after nearly 67 hours.

When we mix a drop of ink in water we get a ______.

State whether true or false. If false, correct the statement.

Buttermilk is an example of heterogeneous mixture.

A ______ mixture has no distinguishable boundary between its components.

Draw the structure of oxygen and sulphur atoms.

State whether true or false. If false, correct the statement.

Group 17 elements are named as Halogens.

Statement: Elements in a group generally possess similar properties but elements along a period have different properties.

Reason: The difference in electronic configuration makes the element differ in their chemical properties along a period.

Give an example for each of the following statement.

A compound in which coordinate bond is formed.

1% solution of Iodoform is used as ______.

Mesoglea is present in ______.

State whether true or false. If false, correct the statement.

Canal system is seen in coelenterates.

Match the following.

What is nematocyst?

Why coelenterates are called diploblastic animals?