
Identify in the given periodic table, the element which is liquid at room temperature. (strand i, Level 1-2)

Recall the correct information about the Whittaker's classification system below: (strand i, Level 3-4)
Refer to Periodic Table, justify scientifically your selected answer in Q 1 above.(strand iii, Level 5-6)
Trait Category | Lion | Tiger | Domestic Cat |
|---|---|---|---|
Size | Very large (150–250 kg) | Very large (180–320 kg) | Small (3–8 kg) |
Stripes | None | Present | None |
Mane (males) | Present | Absent | Absent |
Habitat / Domestication | Wild (savanna/grassland) | Wild (forests) | Domesticated |
Tail features | Long, tufted | Long, no tuft | Variable, no tuft |
Social behavior (optional) | Social (prides) | Solitary | Domestic/social with humans |
Refer this Table of Traits of Felidae Family to respond to Q4
Using the above table, create Dichotomous key to classify the 3 members of the Felidae family (strand ii, Level 5-6)
Apply information in table above to make scientifically supported judgments about first branching trait used (strand iii, Level 5-6)
State the group 1 elements given in above table into ascending order of periods of periodic table (strand i, Level 5-6)
Interpret the information above in the table of Group 1 elements, to make scientifically supported judgments about increase in reactivity of these elements from period 1 to period 4 (strand iii, Level 7-8)