A compound of X and Y has the empirical formula XY₂. Its vapour density is equal to its empirical formula weight. Determine its molecular formula.

Give a geographical reason: Jute is retted after it has been harvested.

The Second half of the 19th century witnessed the growth of a strong feeling of Nationalism. With reference to the statement, answer the following: Write any three repressive Colonial policies of...

Identify the substances underlined: The catalyst used to oxidise ammonia.

Give a geographical reason: Dry farming is preferred in areas with red soil

Preparation of ethanol from Ethyl Chloride.

Write balanced chemical equation.

Mention any two objectives of the Forward Bloc

Read the extract given below and answer the questions that follow:

Bassanio: A gentle scroll. - Fair lady, by your leave; [Kissing her]

I come by note, to give and to receive.
Like one of two...

What is meant by noise pollution? Name one source of sound causing noise pollution.

Given in the box below are a set of 14 biological terms. Of these, 12 can be paired into 6 matching pairs. Out of the six pairs, one has been done for you as an example.

Example: endosmosis – Turgid...

Action of Sodium hydroxide solution on ferrous sulphate solution.

Sclerotic layer or choroid layer (Which one forms the Iris?)

What impact does the waste accumulation have on the Quality of water around us

A Lens forms an upright and diminished image of an object when the object is placed at the focal point of the given lens.

1. Name the lens.
2. Draw a ray diagram to show the image formation.

Lead nitrate solution is treated with sodium hydroxide solution drop wise till it is in excess.

Propane burns in air according to the following equation:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

What volume of propane is consumed on using 1000 cm³ of air, considering only 20% of air contains oxygen?