SELECT - THE CORRECT ANSWER
Gram atomic mass is also considered as
Decomposition of ammonium chloride by heat to give ammonta and chlorine is an example
gram llon/molecule/atom/
(thermal decomposition/thermal dissociation/catalytic reaction
The valeney of copper in Cuci, is
The law which relates between the pressure of a gas and the volume occupied by
11/21/31
temperature remaining constant is
6. The temperature is called absolute zero. [273K/0°C/-273°C]
(Charle's law/Boyle's law/Lussac's law]
6. Oxygen in presence of U.V. light gives two
to give ozone. (oxygen atoms/oxygen molecule /two oxygen molecules
This combines with
7. Hydrogen and carbon monoxide are examples of
are examples of
gases while chlorine and oxygen
gases. (non-combustible/combustible]
8. An increase in pressure on the surface of water causes
of the gas dissolved in water. [increase/ decrease/no changel
in the solubility
is an example of an efflorescent salt, while
deliquescent salt. [lead chloride/washing soda/iron (III) chloride)
an example of a
10. If an element X has atomic number 18, then its valency is - I+1/-1/01
11. The maximum number of electrons in any shell of an atom is represented by 2n? The
maximum number of electrons in the M shell is
[2/32/18/8)
12. Isotopes of chlorine have the same
but different number of
[atomic number/mass number/neutrons/protons/electrons]
13. An element 'Y' has atomic number 20. It finds position in period
- 12/3/41 and
group
[1/2/3).
14. The basis of classification of elements by Newland was based on arrangement of elements
in increasing order of
(atomic number/atomic weights) in series of 16/7/8].
15. The period-1 contains
elements, and periods 2 and 3. elements each. There
horizontal rows called periods, and vertical columns called groups. An
element in period-3 will have
electron shells or orbits and in group VA
will have
valence electrons in its outermost shell. [2/3/5/7/8/10/18]
16. Period-2 is a — (short/longl period containing [six/seven/eight] elements of which,
carbon (at. no. 6) is placed in group [14 [IVA]/15 [VA]/16 [VA], nitrogen (at no. 7)
is placed in group [14 / 15/16), oxygen (at. no. 8) is placed in group [14/15/
16/17), sulphur (at. no. 16) is placed in group [14/15/16/17] & chilorine (at no.
17) is placed in group - [14/15/16/17]
17. On moving from left to right in a period, the number of electron shells
(remain same/
[remain same/increase by one), the number of valence electrons
[Non-metallic to
increase by one) and the elements show a transition from
metallic/metallic to non-metallic) character. On moving down a group, the valence electrons
[remain same/increase by one) and the elements show a transition from
(non-metallic to metallic/metallic to non-metallic) character.
18. A non-renewable source of energy fuel used instead of fossel fuel to reduce green
[hydrogen energy/biogas/C.N.G.)
house gas pollution is
Answers
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SELECT - THE CORRECT ANSWER
Gram atomic mass is also considered as
Decomposition of ammonium chloride by heat to give ammonta and chlorine is an example
gram llon/molecule/atom/
(thermal decomposition/thermal dissociation/catalytic reaction
The valeney of copper in Cuci, is
The law which relates between the pressure of a gas and the volume occupied by
11/21/31
temperature remaining constant is
6. The temperature is called absolute zero. [273K/0°C/-273°C]
(Charle's law/Boyle's law/Lussac's law]
6. Oxygen in presence of U.V. light gives two
to give ozone. (oxygen atoms/oxygen molecule /two oxygen molecules
This combines with
7. Hydrogen and carbon monoxide are examples of
are examples of
gases while chlorine and oxygen
gases. (non-combustible/combustible]
8. An increase in pressure on the surface of water causes
of the gas dissolved in water. [increase/ decrease/no changel
in the solubility
is an example of an efflorescent salt, while
deliquescent salt. [lead chloride/washing soda/iron (III) chloride)
an example of a
10. If an element X has atomic number 18, then its valency is - I+1/-1/01
11. The maximum number of electrons in any shell of an atom is represented by 2n? The
maximum number of electrons in the M shell is
[2/32/18/8)
12. Isotopes of chlorine have the same
but different number of
[atomic number/mass number/neutrons/protons/electrons]
13. An element 'Y' has atomic number 20. It finds position in period
- 12/3/41 and
group
[1/2/3).
14. The basis of classification of elements by Newland was based on arrangement of elements
in increasing order of
(atomic number/atomic weights) in series of 16/7/8].
15. The period-1 contains
elements, and periods 2 and 3. elements each. There
horizontal rows called periods, and vertical columns called groups. An
element in period-3 will have
electron shells or orbits and in group VA
will have
valence electrons in its outermost shell. [2/3/5/7/8/10/18]
16. Period-2 is a — (short/longl period containing [six/seven/eight] elements of which,
carbon (at. no. 6) is placed in group [14 [IVA]/15 [VA]/16 [VA], nitrogen (at no. 7)
is placed in group [14 / 15/16), oxygen (at. no. 8) is placed in group [14/15/
16/17), sulphur (at. no. 16) is placed in group [14/15/16/17] & chilorine (at no.
17) is placed in group - [14/15/16/17]
17. On moving from left to right in a period, the number of electron shells
(remain same/
[remain same/increase by one), the number of valence electrons
[Non-metallic to
increase by one) and the elements show a transition from
metallic/metallic to non-metallic) character. On moving down a group, the valence electrons
[remain same/increase by one) and the elements show a transition from
(non-metallic to metallic/metallic to non-metallic) character.
18. A non-renewable source of energy fuel used instead of fossel fuel to reduce green
[hydrogen energy/biogas/C.N.G.)
house gas pollution is
Answer:
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