After viewing different slides, a student draws following diagrams. Select the one which depicts binary fission in amoeba:
C.
During binary fission, a single cell gets divided into two equal and identical daughter cells.
Which of the following observations is true about dilute solution of acetic acid?
It smells like vinegar and turns red litmus blue
It smells like onion and turns blue litmus red
It smells like orange and turns red litmus blue
It smells like orange and turns red litmus blue
A student takes Na2CO3 powder in a test tube and pours some drops of acetic acid over it. He observes:
no reaction in the test tube
colourless gas with pungent smell
bubbles of a colourless and odourless gas
bubbles of a colourless and odourless gas
A student adds 4 mL of acetic acid to a test tube containing 4 mL of distilled water. He then shakes the test tube and leaves it to settle. After about 10 minutes he observes:
a layer of water over the layer of acetic acid
a layer of acetic acid over the layer of water
a precipitate settling at the bottom of the test tube
a precipitate settling at the bottom of the test tube
A student prepared an aqueous solution of CuSO4 in beaker X and an aqueous solution of FeSO4 in beaker Y. He then dropped some iron pieces in beaker X and some zinc pieces in beaker Y. After about 10 hours he observed that the solutions in X and Y respectively appear:
blue and green
colorless and pale green
colourless and light blue
colourless and light blue
Name the functional group present in each of the following compounds:
(i) HCOOH
(ii) C2H5CHO
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?