Study the given Venn diagram carefully.
Which of the following colloidal systems correctly represent points 1, 2 and 3?
|A||Mist||Whipped cream||Dust fumes|
|B||Milk||Hair cream||Pumice stone|
|D||Coloured glasses||Wings of butterflies||Butter|
Ms Mehta, a science teacher gave different mixtures to four groups of students to separate their components. Which group was not following the correct method?
A Group 1 was separating a mixture of ethyl alcohol and water by using separating funnel.
B Group 2 was separating a mixture of ammonium chloride and sodium chloride using sublimation.
C Group 3 was separating a mixture of iron pins and sand by using a magnet.
D Group 4 was separating mud particles suspended in water using sedimentation and decantation.
Why are the days shorter and colder in winter?
A The earth is spinning slower during this time.
B There are more clouds covering the earth and blocking the sun.
C The earth is tilted away from the sun and the sun's rays strike the earth less directly.
D The moon is causing fewer rays to get to the earth.
i am a small kid to understand
Refer to the given dichotomous key and select the incorrect option regarding it.
A P could be Xanthomonas that causes citrus canker in plants whereas Q could be Clostridium that causes tetanus in humans.
B R could be Chlorella whereas S could be Streptomyces.
C S could be Penicillium whereas T could be Leishmania.
D Q could be Mycobacterium that causes tuberculosis in humans whereas S could be Aspergillus.