Advertisements
Advertisements
प्रश्न
Which pair of substances among the following would float in a tumbler half filled with water?
विकल्प
Cotton thread, thermocol
Feather, plastic ball
Pin, oil drops
Rubber band, coin
Advertisements
उत्तर
Feather, plastic ball
Explanation:
Feather and plastic ball will float on water because they are lighter than water.
APPEARS IN
संबंधित प्रश्न
Very Short Answer Type Question:
List three liquids which are transparent.
Name five objects which can be made from wood.
Choose the odd one:
Smooth materials do not have ups and downs.
Soft material ______.
Some of the following statements are incorrect. Find the incorrect statements and correct them.
- The property of metals by virtue of which they can be drawn into wires is called ductility.
- Metals are good conductors of electricity but poor conductor of heat.
- Articles made up of metals produce ringing sound when struck hard.
- Oxides of non-metals and metals are acidic in nature.
- A less reactive metal displaces a more reactive metal from its salt solution in water.
Fill in the blanks to complete the following paragraph.
The name of the product formed in the reaction of sulphur and ______ is sulphur dioxide gas. When sulphur dioxide is dissolved in ______, sulphurous acid is formed. The sulphurous acid turns ______ litmus paper to ______. Generally oxides of ______ are acidic in nature.
After completing the paragraph, write two questions which you can raise on the basis of this information.
Boojho found a bag containing the following materials
- Mirror
- Paper stained with oil
- Magnet
- Glass spectacles
Help Boojho in finding out the material(s) which is/are opaque.
Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants?
Sugar, salt, mustard oil, sand, sawdust, honey, chalk powder, petals of flower, soil, copper sulphate crystals, glucose, wheat flour are some substances given to Paheli. She wants to know whether these substances are soluble in water or not. Help her in identifying soluble and insoluble substances in water.
