Geeta has given some statements about the materials given in the box.
Which of the statements given by her is/are correct?
AAir is a heterogeneous mixture.
BWater, sugar and carbon dioxide are compounds.
CMercury and nitrogen are elements.
DBoth B and C.
The table given below shows the characteristics of two groups of animals.
Which statement best explains why cats and dogs are classified as mammals and not reptiles?
AThey both lay eggs.
BTheir body temperature does not change with the environment.
CThey both have scales.
DThey both are types of pets.
Read the given paragraph where few words have been italicised.
Buccal cavity of humans contains two pairs of salivary glands which secrete digestive juices that help in digestion of proteins present in food. From here food enters stomach where digestion of mainly fats takes place. As this semi-digested food enters small intestine complete digestion of food occurs. Small intestine receives bile juice from pancreas which digests fats. Most absorption of water occurs in large intestine.
Select the correct option regarding this.
ATwo should be replaced by four whereas proteins should not be replaced as it is correctly mentioned.
BFats should be replaced by carbohydrates and pancreas should be replaced by liver.
CDigests should be replaced by emulsifies.
DLarge should be replaced by small.
There are no words italicised in this paragraph...
Which of the following statements is INCORRECT ?
ALoam is a mixture of sand and clay
BClayey soil is the best soil for plants because it contains lots of air, water and humus.
CSandy soil does not hold much water.
DManure is rich in humus and it makes the soil fertile.
THE CORRECT ANSWER IS C iiiiiiiiiiiiiiiiii
The diagram shows a boiling tube filled with water. There is an ice cube wrapped with wire gauze at the bottom of the tube, and the water at the top of the tube is heated as shown. When water at the top of the tube is boiling, the ice cube remains frozen. What can you infer from this experiment?
AHeat gain causes matter to expand.
BHeat loss causes matter to contract.
CIce cubes melt at 0°C.
DWater is a poor conductor of heat.