English Medium Class 10 - CBSE Question Bank Solutions for Science

Which one of the following processes involves chemical reactions?

Give the ratio in which hydrogen and oxygen are present in water by volume.

Which among the following statement(s) is (are) true?

Exposure of silver chloride to sunlight for a long duration turns grey due to

(i) the formation of silver by decomposition of silver chloride.

(ii) sublimation of silver chloride.

(iii) decomposition of chlorine gas from silver chloride.

(iv) oxidation of silver chloride.

Which of the following is an endothermic process?

When SO₂ gas is passed through a saturated solution of H₂S, which of the following reaction occurs?

Which of the following is not considered as crystalline allotrope of carbon?

Which of the following is not an allotropic form of carbon?

Reflex actions are mediated through ____________.

How many number of carbon atoms are joined in a spherical molecule of buckminsterfullerene?

The unit of specific resistance is ____________.

The slope of voltage (V) versus current (I) is called:

The variable resistance is called ____________.

The temperature of a conductor is increased. The graph best showing the variation of its resistance is:

A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R₁, R₂ and R₃ respectively. Which of the following is hue?

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

Assertion: The statement of Ohm’s law is K = IR.

Reason: V = IR is the equation which defines resistance.

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 ____________.

Assertion: Decomposition of vegetable matter into compost is an endothermic reaction.

Reason: Decomposition reaction involves breakdown of a single reactant into simpler products.