Chem SS3 2nd Term
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1 / 60
The following are applications of radiactivity except ________
2 / 60
Ethanol could be prepared in the laboratory by______
3 / 60
The filter in a cigarette reduces the amount of nicotine inhaled by
4 / 60
Alpha particle was deflected towards negative plate while Beta deflected toward __________
5 / 60
Vander Wall force of attraction can be grouped as _______
6 / 60
An alkanol containing 60% carbon by mass would have a molecular formula (H=1,C=12,O=16)
7 / 60
Acid react with base to form_____
8 / 60
Brown ring test is used to confirm __________
9 / 60
An aqueous solution of Na2CO3 is ______
10 / 60
11 / 60
The chemical formula of Sand is _____
12 / 60
Empirical formula is the ______
13 / 60
Types of isotopes of hydrogen are as follows EXCEPT ______
14 / 60
Nucleons are sub-atom particles which consist of_______
15 / 60
Which of the following metals would not release hydrogen when reacted with dilute HCl
16 / 60
The IUPAC name of the compound CH3CHClCH2OH is______
17 / 60
Deep yellow colour indicate the presence of __________
18 / 60
Sodium tarnishes easily when exposed to air due to presence of ________
19 / 60
Hydrogen bonding occur when hydrogen is covalently bonded with strongly ____________
20 / 60
Aluminum can not react with either dilute HNO3 or conc. HNO3 due to formation of a protective layer of ____________
21 / 60
What is the colour of sodium flame?
22 / 60
The following caused fluorescence of matter except ________
23 / 60
The neutron-proton ration determines the stability of an element.
24 / 60
Nuclear reaction releases ________
25 / 60
Aluminium reacts readily with all common mineral acids except __________
26 / 60
_________ is the process in which two or more light nuclei of elements combine together to form a heavier nucleus with release of both energy and radiation.
27 / 60
The molecules are held together by _______ intermolecular forces
28 / 60
Which of the following substances has the lowest boiling point?
29 / 60
Which of the following gases could be collected by downward displacement of air?
30 / 60
Which of the following alkanols is tertiary
31 / 60
All the following are ionic compound except ______$
32 / 60
Which of the following oxides has a giant covalent structure
33 / 60
A lone pair of electron is found in ___________
34 / 60
Deep green colour of flame indicate the presence of _________
35 / 60
Which of the following pairs of gases cannot be collected by downward delivery
36 / 60
2Na + H2OÂ Â ~Â Na2O + H2
The above reaction shows that sodium reacts violently with cold water giving out a lot of heat and liberating ________
37 / 60
Which of the following oxides would form two different types of acids when dissolved in water
38 / 60
The percentage by mass of water in Na2CO3.10H2O is ______ (Na=23, H=1, C=12,O=16)
39 / 60
The oxidation number of chromium in Na2Cr2O7 is ________
40 / 60
_________ is an example of electronegative elements.
41 / 60
The metallic particles are held together in a __________ of closely packed sphere.
42 / 60
A metal carbonate that would not decompose when heated strongly is
43 / 60
The type of energy changes that accompany the mixing of a strong acid to a strong base is
44 / 60
An electrostatic attraction set up when the __________ of one molecule attract the negative pole of another molecule
45 / 60
________ are fast moving stream of electrons.
46 / 60
The first definition of an element was made by
47 / 60
Both metallic substance and electrovalent compound are similar because ________
48 / 60
The spontaneous disintegration/decay of nucleus of an element is due to its ___________
49 / 60
The electron configuration of element Y is 1s2 2s2 2p6, 3s2 3p4 Y therefore
50 / 60
The only alkaline gas that changes moist red litmus paper to blue is________
51 / 60
Which of the following conditions are necessary for the preparation of alkanoates from alkanols and alkanoic
52 / 60
Which of the following scientists formulated the law of conservation of mass?
53 / 60
Sodium Chloride is used in the following processes except______
54 / 60
Sodium reacts explosively with cold water to liberate ____________
55 / 60
Iron is the _________ most abundant metal in the earths crust
56 / 60
___________ is an example of radioactive detectors.
57 / 60
______is the process in which the nucleus of a heavy element is split into two nuclei of nearly equal mass with a release of energy and radiation
58 / 60
The shape of CH4 is
59 / 60
A greenish yellow gas that change moist iodide paper black is __________
60 / 60
A covalent hydride which does not exist as a gas at room temperature______
Your score is
The average score is 44%
