- Trending Categories
- Data Structure
- Operating System
- MS Excel
- C Programming
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Can we reverse the following changes? If yes, suggest the name of the method.
(a) Water into water vapour
(b) Water vapour into water
(c) Ice into water
(d) Curd into milk
(a) Water into water vapour – Yes
By the method of condensation, water vapour can be converted to water.
(b) Water vapour into the water – Yes
On evaporating, water can be converted to water vapour.
(c) Ice into the water – Yes
On freezing, water can be converted to ice.
(d) Curd into milk – No
The conversion of curd to milk is an irreversible process.
- Related Articles
- Which of the two diffuses slower: bromine vapour into air or copper sulphate into water?
- Fill up the blanks in the following:(a) The process of changing water into its vapour is called_______________ .(b) The process of changing water vapour into water is called_____________ .(c) No rainfall for a year or more may lead to _____________ in that region.(d) Excessive rain may cause__________ .
- Which of the following statements are “true”?(a) Water vapour is present in air only during the monsoon.(b) Water evaporates into air from oceans, rivers and lakes but not from the soil.(c) The process of water changing into its vapour is called evaporation.(d) The evaporation of water takes place only in sunlight.(e) Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler.
- When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of:(a) oxygen (b) carbon dioxide (c) nitrogen (d) water vapour
- Conversion of ice into water and water into ice is an example of change which can be reversed. Give four more examples where you can say that the changes can be reversed.
- Transpiration is a process in which plants(a) receive water from soil(b) absorb water vapour from air(c) prepare food from water(d) release water vapour.
- Clouds are(a) tiny drops of water floating in air(b) mixture of dust and water vapour(c) particles of water vapour(d) rain drops in air.
- Which of the following is not a physical change?(a) Boiling of water to give water vapour(b) Melting of ice to give water(c) Dissolution of salt in water(d) Combustion of Liquefied Petroleum Gas (LPG)
- “Catch water where it falls” is the basic idea behind(a) recycling of water(b) making dams to store water(c) rainwater harvesting(d) condensation of water vapour
- Classify the following into solutions, suspensions and colloids :Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
- Paheli asked for a glass of water from Boojho. He gave her a glass of ice cold water. Paheli observed some water droplets on the outer surface of the glass and asked Boojho how these droplets of water were formed. Which of the following should be Boojho’s answer?(a) Evaporation of water from the glass.(b) Water that seeped out from the glass.(c) Evaporation of atmospheric water vapour.(d) Condensation of atmospheric water vapour.
- Infiltration isA) Filtration of water thought filter paperB) Filtration of water thought funnelC) Seepage of water into the groundD) Decantation of water
- Select the correct statement regarding water pollution.(A) Suspended impurities make water more transparent causing death of submerged aquatic plants.(B) Polluted water can cause diseases.(C) Water pollution increases dissolved oxygen level of water.(D) Agricultural runoff pollutes water into it.
- The main reason for the abundant coliform bacteria in the water of river Ganga is:(a) immersion of ashes of the dead into the river (b) washing of clothes on the banks of river(c) discharge of industrial wastes into river water (d) disposal of unburnt corpses into river water
- At a hydro power plant:(a) kinetic energy possessed by stored water is converted into electrical energy.(b) electricity is extracted from water.(c) water is converted into steam to turn turbines and produce electricity.(d) potential energy possessed by stored water is converted into electricity.