English Medium कक्षा १० - CBSE Question Bank Solutions for Science

In an experiment to trace the path of a ray of light through a glass prism for different values of angle of incidence a student would find that the emergent ray: 

(A) is parallel to the incident ray

(B) perpendicular to the incident ray

(C) is parallel to the refracted ray

(D) bends at an angle to the direction of incident ray

When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained. What happens when a second identical prism is placed in an inverted position with respect to the first prism? Draw a labelled ray diagram to illustrate it.

Draw a labeled ray diagram to illustrate the dispersion of a narrow beam of white light when it passes through a glass prism.

No chemical reaction takes place when granules of a solid, A, are mixed with the powder of another solid, B. However when the mixture is heated, a reaction takes place between its components. One of the products, C, is a metal and settles down in the molten state while the other product, D, floats over it. It was observed that the reaction is highly exothermic.

(i) Based on the given information make an assumption about A and B and write a chemical equation for the chemical reaction indicating the conditions of reaction, physical state of reactants and products and thermal status of reaction.

(ii) Mention any two types of reactions under which above chemical reaction can be classified.

A glass prism is able to produce the spectrum when white light passes through it, but a glass slab doesn’t produce any spectrum. Explain why it is so. 

Differentiate between a glass slab and a glass prism.

What is ‘rusting’?

Answer the following question.

List two properties of alloys.

What is the cause of the dispersion of white light through a glass prism? Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in an inverted position with respect to each other and a narrow beam of white light is allowed to fall obliquely on one of the faces of the prisms.

A student has to trace the path of a ray of light through a glass prism. List four precautions he should observe for better results.

Galvanisation is a method of protecting iron from rusting by coating it with a thin layer of ____________.

Amalgam is an alloy of ____________.

Copper objects lose their shine and form green coating of ____________.

Which among the following alloys contain mercury as one of its constituents?

When white light enters a glass prism from the air, the angle of deviation is least for ____________.

Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?

Name the scientist who was the first to use a glass prism to obtain the spectrum of sunlight.

The phenomena of light involved in the formation of rainbow are ______.

The splitting of white light into its component colours is called ____________.

The diagram shows the reaction between metal and dil. acid.

What is the reason for different behaviour of Mg in test tube B?