Unit – IV CHEMICAL EQUATION - CHEMISTRY
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Question 1 |
Atomic number of sodium is 11, then number of electrons in sodium ion is ………….
9 | |
10 | |
12 |
Question 2 |
Number of electrons lost by Fe2+ ion is ……………..
2 | |
3 | |
0 |
Question 3 |
An ion is produced as a result of gain or loss of electrons by an atom. In Au3+ ion, 3 electrons are ………..
gained | |
lost |
Question 4 |
Metals usually form ……………..
cations | |
anions | |
neutral charge |
Question 5 |
The negatively charged ions are called ………………..
anions | |
dipositive ions | |
cations |
Question 6 |
The cation present in lead nitrate is ……………….
Plumbic | |
plumbus | |
stannous |
Question 7 |
The monovalent polyatomic ion is ………………..
bisulphate ion | |
borate ion | |
peroxide ion |
Question 8 |
The valency of Lithium is ……………..
1 | |
2 | |
3 |
Question 9 |
The valency of Barium is …………….
2 | |
1 | |
4 |
Question 10 |
The valency of Boron is ………………
3 | |
2 | |
1 |
Question 11 |
The name of Sn4+ is ………………..
Tin (IV) | |
Tin (II) | |
Lead (II) |
Question 12 |
In writing a chemical formula …………. is enclosed in a bracket.
precipitate | |
gas | |
radical |
Question 13 |
The number of electrons gained by Sulphur is ……………...
1 | |
2 | |
3 |
Question 14 |
Non –metals usually ………… electrons when they form ions.
loss | |
gain |
Question 15 |
Atomic number of fluoride is ………….
9 | |
10 |
Question 16 |
In sodium sulphate, sulphate is called as the ……………..
acid radical | |
basic radical |
Question 17 |
In potassium, chloride, Potassium is the ………………
acid radical | |
basic radical |
Question 18 |
Chemical formula of compound is the symbolic representation of its __composition___.
structure | |
composition |
Question 19 |
To write the chemical formula of a compound, symbols and ………….. of constituent elements must be known.
valencies | |
charges |
Question 20 |
If the subscript of the radial is __one_____ it is imitted.
one | |
two |
Question 21 |
The greek prefix for the number 5 is …………...
penta | |
hexa |
Question 22 |
A chemical reaction is always accompanied by ……………. changes.
heat | |
chemicals |
Question 23 |
During a thunder storm, lighting converts oxygen into ……………..
ozone | |
water |
Question 24 |
- Assertion (A) : When sodium ion is formed from sodium atom, an electron is given up.
- Reason (R) : When ions are formed, electrons are gained or lost.
A is wrong R is right | |
R explains A | |
R does not explain A | |
A is right R is wrong |
Question 25 |
- Assertion (A) : During lighting, Nitrogen in the atmosphere combines with Oxygen to form Nitrogen dioxide.
- Reason (R) : Plants use Nitrogen dioxide to produce proteins.
A is wrong R is right | |
R explains A | |
R and A are wrong | |
A is right R is wrong |
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There are 25 questions to complete.
