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Explain: Chemical reactions of ethanol
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You are supplied with two sets of seeds of pea plants. One set is yellow and round seeds with gene constitution YYRr and other set is green and round seeds with gene constitution yyRR. From both sets of seeds plants are cultivated. Pea plant is self-pollinated but arrange artificial cross between two given plants cultivated from seeds. Which offsprings do you expect? show with chart.
What is combination reaction ? Explain it with examples.
Write the structural formulae of the following compounds :
(1) Methanoic acid
(2) 1-Bromobutane
(3) Methanal
(4) 2-Bromopropane
(5) Butanal
(6) Pentene
(7) Pentyne
(8) Pentan-2-one
(1) Methanoic acid
(2) 1-Bromobutane
(3) Methanal
(4) 2-Bromopropane
(5) Butanal
(6) Pentene
(7) Pentyne
(8) Pentan-2-one
Some groups of three elements are given below:
Which of these groups is not an example of Dobereiner’s triad? Explain it.
→| Group $A$ element | Atomic mass | Group $B$ element | Atomic mass | Group $C$ element | Atomic mass |
| $N$ | $14.0$ | $Ca$ | $40.1$ | $Cl$ | $35.5$ |
| $P$ | $31.0$ | $Sr$ | $87.6$ | $Br$ | $79.9$ |
| $As$ | $74.9$ | $Ba$ | $137.3$ | $I$ | $126.9$ |
Difference between: Budding and Sporulation
Why do organisms of same species look similar?
What are Exothermic and Endothermic reaction ? Give examples.
(1) What are the changes seen in girls at the time of puberty? (2) What are the changes seen in the boys at the time of puberty? ### What are the changes seen in girls at the time of puberty?
Write a short note on plaster of paris $(POP).$
→Distinguish between:
Metals and non-metals on the basis of their physical properties.
Metals and non-metals on the basis of their physical properties.