English Medium Class 10 - CBSE Question Bank Solutions for Science

The following reaction is an example of:

\[\ce{4NH3_{(g)} + 5O2_{(g)} -> 4NO_{(g)} + 6H2O_{(g)}}\]

(i) displacement reaction

(ii) combination reaction

(iii) redox reaction

(iv) neutralisation reaction

Which option denotes a double displacement reaction?

Which among the following is (are) double displacement reaction(s)?

(i) \[\ce{Pb + CuCl -> PbCl2 + Cu}\]

(ii) \[\ce{Na2SO4 + BaCl2 -> BaSO4 + 2NaCl}\]

(iii) \[\ce{C + O2 -> CO2}\]

(iv) \[\ce{CH4 + 2O2 -> CO2 + 2H2O}\]

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of reaction involved?

(i) Displacement reaction

(ii) Precipitation reaction

(iii) Combination reaction

(iv) Double displacement reaction

In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?

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 magnetic field lines outside a bar magnet:

Which of the following diagrams correctly shows the magnetic field produced by a current-carrying wire?

The pattern of the magnetic field produced by the straight current-carrying conducting wire is ____________.

The factors on which one magnetic field strength is produced by current-carrying solenoids depends are

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

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

The table shown below gives information about four substances: A, B, C and D.

Identify Ionic compounds from the above given substances.