Water Test - 6...

Observe the flow chart and identify P, Q, R and S.

Which of the following are the forms of surface water?

(i) Streams
(ii) River water
(iii) Lakes
(iv) Springs

Observe the following Venn diagrams and identify the correct option regarding the temperatures represented by T₁, T₂, T₃ and T₄.

Observe the flow chart and select the option that correctly identifies the processes P, Q, R, X and Y.

________ is observed on the leaves of grass and plants on winter mornings.

Consider the following statements:

(i) The liquid in which a substance dissolves is the solvent.
(ii) The substance which gets dissolved in a solvent is the solute.
(iii) On heating a saturated solution, the excess salt gets precipitated from the solution.
(iv) The resultant mixture obtained when no more solute can be dissolved in the solvent is called a saturated solution.

Which of the above statements is not correct?

Which of the following actions will not help in prevention of water pollution?

In which of the following cases will evaporation of water be the fastest if equal quantity of water is taken in each of the cases?

Which of the following statements is/are false?

a. Red worms used for vermicomposting grind their food with their teeth.
b. Vermicompost contains a large amount of castings, which are, the material that passses through the gut of the worms.
c. Compost does not pollute the environment.

Which of the following is a renewable resource?

Match the following:

Which of the following options shows the correct sequence of waste management?

Which of the following statements is/are false?

(a) Empty glass bottles are reusable.
(b) Domestic sewerage is an example of biodegradable waste.
(c) Plastic waste is biodegradable.
(d) To keep the environment clean, we should recycle the waste.

Which of the following is not a non-biodegradable waste?

Which of the following statements is/are false?

a.Stray animals often get killed when they swallow plastic bags from the garbage dumps.
b.Burning of polythene bags is an effective method of waste disposal.
c.Waste management is a huge challenge because of the excessive use of plastic.

Analyse the two statements given below and select the correct option.

Statement I: Air is a mixture of different gases.
Statement II: The different gases in the atmosphere forms different layers, with the heaviest gas forming the bottom-most layer.

Match the components of air given under left column with their characteristics given under right column:

Analyse the given statements:

A. Air is a compound formed by chemical reactions between different gases.
B. Air displays the properties of all the component gases.
C. The gases in the air are essential for the sustenance of life on the Earth.
D. The dust particles in the air play an important role in the formation of clouds.

Which of the following options is the correct analysis of the statements?

Consider the following statements about inhaled air and exhaled air:

(i) Exhaled air contains more carbon dioxide than inhaled air.
(ii) Exhaled air is cooler than inhaled air.
(iii) Inhaled air contains more moisture than exhaled air.
(iv) Inhaled air contains more oxygen than exhaled air.

Which of the above statements are correct?

Study the dichotomous key and identify W, X, Y and Z.

I. (i) A gaseous component of air Go to II
(ii) A solid component of air
II. (i) The second most abundant gas in the atmosphere
(ii) Forms a much lesser percentage of air Go to III
III. (i) A raw material for photosynthesis
(ii) A noble gas