English Medium Class 10 - CBSE Question Bank Solutions for Science

Classify the following reaction into different type:

AgNO₃(aq) + NaCl(aq) →AgCl(s) + NaNO₃(aq)

Classify the following reaction into different type:

Zn + CuSO₄ → ZnSO₄ + Cu

Give reasons for the following:
The reaction of iron (III) oxide [Fe₂O₃] with heated aluminum is used to join cracked machine parts.

Which of the following is a displacement reaction?

\[\ce{Pb + CuCl2 -> PbCl2 + Cu}\]

The above reaction is an example of:

The defect of vision in which the person is able to see a distant object distinctly but cannot see nearby objects clearly is called:

Assertion: The near point of a hypermetropia eye is more than 25 cm away.

Reason: Hypermetropia is corrected using spectacles containing concave lenses.

A positive charge is moving towards a person. The direction of magnetic field lines will be in ____________.

A current through a horizontal power line flows from south to north direction. The direction of magnetic field line 0.5m above it is ____________.

The strength of each magnet reduces to half when it is cut along its length into the equal parts magnetic field strength of a solenoid. The polarity of the solenoid can be determined by ____________.

A positive charge is moving upwards in a magnetic field directed towards the north. The particle will be deflected towards ____________.

Who has stated the Right-hand Thumb Rule?

Draw ray diagram showing hypermetropic eye.

Choose the incorrect statement

A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in Figure. The direction of magnetic field at a point will be North to South

The strength of magnetic field inside a long current carrying straight solenoid is

Consider the following chemical equation I and II

1. \[\ce{Mg + 2HCl -> MgCl_2 +H_2}\]
2. \[\ce{NaOH +HCl -> NaCl + H_2O}\]

The correct statement about these equations is:

State the change in colour observed in following case mentioning the reason:

A piece of zinc is dipped in ferrous sulphate solution.

List two difference in the characteristic properties of the virtual images formed by the two types of spherical lenses (concave and convex). How are these characteristics of the two lenses use in the correction of the two common defects of vision namely myopia and hypermetropia?

The colour of the solution observed after 30 minutes of placing zinc metal in copper sulphate solution is ______.