Question

VI. Choose the correct answers -
2x1-2
14. The name of carbon Compound
H H
H - C- C-OH is
H H
A.Methanol
B.Ethanol
C.Ethanal
D.Ethanong
15. The Gas liberated when an acid reacts with a metal is
A.Hydrogen B.Chlorine C.Carbon dioxide D Nitrogen Dioxide
VII.Answer the following questions:-
4x1=4
16.State Modern periodic Law
17.Ionic Compounds have high melting points. Why?
18.What is Catenation?
19. What are "Groups' and 'periods' in the modern periodic table?
VIII.Answer the following questions:-
3x2=6
20. Explain Combustion reaction of Carbon compounds with an example
21. The Atomic number of chlorine is 16
a) in which period of the modern periodic table could this element be placed?why?
b) How will you decide whether the element is a metal or non metal?​

Answer 1

Answer:

ethanol,hydrogen gas,

16.properties of elements are a periodic function of their atomic number

17. because the force of attraction between positive ions and negative ions is very strong so they have high melting points

18. carbon compounds have unique ability to form bond with other carbon compounds give rise to large molecules is called catanation

19 groups are 18 and periods are 7

20.c+o2=co2+heat and light

21.group number of chlorine is 17 because it is non metal

b. metals are arranged in lhs of periodic table and non metals are in rhs of periodic table