9th Chemistry Chapter4 Structure of Molecules

Sr #	Questions	A	B	C	D
1	Transfer of lectrons between atoms results in :	metallic bonding	ionic bonding	covalent bonding	coordinate covalent bonding
2	Which of the following atoms will not form cation or anion.	A (atomic no. 16 )	B (atomic No . 17 )	C (atomic No. 18 )	D ( atomic No. 19)
3	Fundamentally , some forces of attraction hold atoms together in substances. These forces are called :	chemical bonds	ionic bonds	covalent bonds	octet rule
4	Which of the following atoms will form cation	20 atomic number	18 atomic number	17 atomic number	15 atomic number
5	Identify the covalent compound	NaCl	MgO	H2O	KF
6	Ice floats on water because :	ice is denser than water	ice is crystalline in nature	water is denser than ice	water molecules move randomly
7	Which of the following compounds is not directional in its bonding ?	CH4	KBr	CO2	H2O
8	A bond pair in covalent moleules usually has :	one electron	two electrons	three electrons	four electrons
9	The forces o f attraction that bind oppositely charged ions are called :	covalents bond	ionic bond	chemical bonding	duplet rule
10	Which of the following atomic obey duplet rule?	O2	F2	X2	N2
11	Which of the following is not true about the formation of Na2S:	Each sodium atom loses one electron	sodium forms cation	Sulphur forms anion	Each Sulphur atom gains one electron
12	Atoms react with each other beacuse :	they are attracted to each other	they are short of electrons	they want to attain stability	they want to disperse
13	The tendency of some atoms to acquire two electron configuration in their valence shell, when bonding, is called :	duplet rule	octet rule	chemical bonds	covalent bonds
14	A ______ is formed by mutual sharing of electrons between two atoms	chemical bonding	ionic bond	octet rule	covalents bond
15	How many electrons does a triple covalent bond involve ?	eight	six	four	only three
16	Silicon belongs to Group IVA. It has ___________ electrons in the valence shell	2	3	4	6
17	In the formation of ALF3, aluminum atom loses ___________ electrons.	1	2	3	4
18	An atom having six electrons in its valence shell will achieve noble gas electronic configuration by :	gaining one electron	losing all electrons	gaining two electrons	losing two electrons
19	Covalent bond involves the :	donation of electrons	acceptance of electrons	sharing of electrons	repulsion of electrons
20	A bond formed between two non-molecules usually has:	covalent	ionic	metallic	coordinate covalent
21	When an electronegative element combines with an electropositive elemnt the type of bonding is	Covalent	ionic	polar covalent	coordinate covalent
22	Which one of the following is the weakest force among the atoms ?	ionic force	metallic force	intermolecular force	covalent force
23	Which of the following atoms will form an ion of charge-2?	12 atomic number 24 mass number	14 atomic number 28mass number	8 atomic atomic number 8mass number	10 atomic 20 mass number
24	Phosphorus belongs to third period of Group VA. How many electrons it needs to complete its valence shell.	2	3	4	5
25	The tendency of atoms to acquire eight electron configuration in their valence whel, when bonding, is called :	duplet rule	octet rule	chemical bonds	ionic bonds
26	Considering the electronic configurationof atoms which atom with the given atomic number wwill be the most stable one ?	6	8	10	12