Forum

Mensuration

Two cylinders of same volume have their radii in the ratio 1:6, then
ratio of their heights is __________.

04/11/2024

Mathematics

8th

Physical and chemical changes

How would you show that setting of curd is a chemical change?

04/11/2024

Science

7th

Mensuration

Two cylinders of equal volume have heights in the ratio 1:9. The
ratio of their radii is __________.

04/11/2024

Mathematics

8th

Mensuration

__________ surface area of room = area of 4 walls.

04/11/2024

Mathematics

8th

Mensuration

__________ of a solid is the measurement of the space occupied by it.

04/11/2024

Mathematics

8th

Physical and chemical changes

When a candle burns, both physical and chemical changes take place.
Identify these changes. Give another example of a familiar process in
which both the chemical and physical changes take place.

04/11/2024

Science

7th

Mensuration

Two cylinders A and B are formed by folding a rectangular sheet of
dimensions 20 cm × 10 cm along its length and also along its breadth
respectively. Then volume of A is ________ of volume of B.

04/11/2024

Mathematics

8th

Physical and chemical changes

When baking soda is mixed with lemon juice, bubbles are formed with
the evolution of a gas. What type of change is it? Explain.

04/11/2024

Science

7th

Mensuration

Area of a rhombus = 1/2 product of _________.

04/11/2024

Mathematics

8th

Physical and chemical changes

Fill in the blanks in the following statements:
(a) When carbon dioxide is passed through lime water, it turns milky
due to the formation of _________.
(b) The chemical name of baking soda is _________.
(c) Two methods by which rusting of iron can be prevented are
_________ and _________.
(d) Changes in which only _________ properties of a substance change
are called physical changes.
(e) Changes in which new substances are formed are called _________
changes.

04/11/2024

Science

7th