In group 1 salts of ___ are mostly hydrated.
Anonymous Quiz
40%
Lithium
20%
Beryllium
40%
Sodium
0%
Caesium
Find out the incorrect statement regarding atom.
Anonymous Quiz
0%
Determination of atomic size cannot be precise.
70%
Size of atom is about 1.2 A
30%
There are practical ways by which size of individual atom can be measured.
N⁻³ and Na⁺ have same
Anonymous Quiz
20%
Atomic no.
15%
Mass No.
60%
No. of electrons
5%
No. of neutrons
Which of the following has the highest 2ⁿᵈ Ionisation energy?
Anonymous Quiz
21%
Li
53%
F
11%
Be
16%
N
Identify the correct statement.
Anonymous Quiz
0%
All ionisation enthalpy are positive.
42%
First electron gain enthalpy of noble gases are highly negative.
33%
First electron gain enthalpy of N is negative.
25%
All of these
For carbon atom, which ionisation energy will be highest?
Anonymous Quiz
25%
1ˢᵗ
20%
2ⁿᵈ
25%
3ʳᵈ
30%
4ᵗʰ
Who explained the deviation of real
gases from the ideal behaviour through intermolecular
forces ?
gases from the ideal behaviour through intermolecular
forces ?
Anonymous Quiz
40%
Johannes van der Waals
33%
Gay Lussac
13%
Charles
13%
None of these
___ bonds are powerful force in determining the structure and properties of many compounds, for example
proteins and nucleic acids.
proteins and nucleic acids.
Anonymous Quiz
21%
Hydrogen
29%
oxygen
21%
nitrogen
29%
carbon
Bulk properties of matter are the properties associated with
Anonymous Quiz
8%
One atom
31%
One molecule
8%
One ion
54%
Collection of a large numberof atoms, ions or molecules.
Intermolecular forces are the forces of
Anonymous Quiz
24%
attraction only
12%
repulsion only
53%
attraction and repulsion
12%
None of these
London forces were first proposed bty Fritz London who was a
Anonymous Quiz
25%
English physicist
56%
Dutch physicist
19%
German physicist
0%
Greek physicist
Which is the most common example of air pollution that occurs in many cities throughout the world?
Anonymous Quiz
8%
Fog
50%
Smog
25%
Mist
17%
Fumes
Which of the following is not the seen in Classical smog?
Anonymous Quiz
0%
It occurs in cool climate.
18%
It consists of oxidising mixture.
36%
It is also called as reducing smog.
45%
All of these
Which of the following is true for photochemical smog?
Anonymous Quiz
0%
It occurs in warm and dry climate.
50%
It's main component are formed by action of sunlight.
10%
It has high concerntration of oxidising agents.
40%
All of these
The main components of the photochemical smog result from the action of sunlight on which compounds?
Anonymous Quiz
18%
Nitrogen oxides
0%
Unsaturated hydrocarbons
18%
Dioxygen and dinitrogen
64%
Both A and B
Classical smog which of the following chemicals?
Anonymous Quiz
23%
sulphur dioxide
23%
acrolein
23%
formaldehyde
31%
nitrogen oxides
The height of the geostationary satellites above the earth’s surface is approximately 36,000 km.
Anonymous Quiz
79%
True
21%
False
____________ and Boron are same in case when reacted with concentrated nitric acid.
Anonymous Quiz
43%
Oxygen
50%
Aluminium
7%
Hydrogen
0%
No other metal
For a satellite executing an elliptical orbit around a planet, its minimum potential energy is at the perigee.
Anonymous Quiz
64%
True
36%
False
The ionization enthalpy _________ down the group in the family.
Anonymous Quiz
33%
Increases
42%
Decreases
13%
Constant
13%
Is a regular
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