CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313041
Which of the following is not a Dobereiner triad?
1 Cl,Br,I
2 Ca,Sr,Ba
3 Li, Na,K
4 Fe,Co, Ni
Explanation:
Dobereiner triads consist of elements of the same groups and hence Fe, Co, Ni do not constitute a Dobereiner triad.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313042
The law of triads is applicable to -
1 C, N, O
2 H, O, N
3 Na, K, Rb
4 Cl, Br, I
Explanation:
The law of triads is applicable to Cl, Br, I
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313043
Atomic weight of Cl = 35.5 and of I = 127. According to Dobereiner's triad rule atomic weight of Br will be:
1 80
2 162.5
3 81.25
4 91.5
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313044
How many of the following sets represent Dobereiner's triads? i. ii. iii. iv.
1 4
2 2
3 3
4 1
Explanation:
According to Dobereiner, the middle element have an atomic mass almost the average of the other two elements. Sets ii, iii and iv satisfy this conditions and hence, they represent Dobereiner's triads.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313045
The graph of first ionisation enthalpy versus atomic number is as follows : Which of the following statement is correct ?
1 Alkali metals are at the maxima and noble gases at the minima.
2 Noble gases are at the maxima and alkali metals at the minima.
3 Transition elements are at the maxima.
4 Minima and maxima do not show any regular behaviour.
Explanation:
In a period, alkali metals have the lowest and Noble gases have the maximum IE.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313041
Which of the following is not a Dobereiner triad?
1 Cl,Br,I
2 Ca,Sr,Ba
3 Li, Na,K
4 Fe,Co, Ni
Explanation:
Dobereiner triads consist of elements of the same groups and hence Fe, Co, Ni do not constitute a Dobereiner triad.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313042
The law of triads is applicable to -
1 C, N, O
2 H, O, N
3 Na, K, Rb
4 Cl, Br, I
Explanation:
The law of triads is applicable to Cl, Br, I
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313043
Atomic weight of Cl = 35.5 and of I = 127. According to Dobereiner's triad rule atomic weight of Br will be:
1 80
2 162.5
3 81.25
4 91.5
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313044
How many of the following sets represent Dobereiner's triads? i. ii. iii. iv.
1 4
2 2
3 3
4 1
Explanation:
According to Dobereiner, the middle element have an atomic mass almost the average of the other two elements. Sets ii, iii and iv satisfy this conditions and hence, they represent Dobereiner's triads.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313045
The graph of first ionisation enthalpy versus atomic number is as follows : Which of the following statement is correct ?
1 Alkali metals are at the maxima and noble gases at the minima.
2 Noble gases are at the maxima and alkali metals at the minima.
3 Transition elements are at the maxima.
4 Minima and maxima do not show any regular behaviour.
Explanation:
In a period, alkali metals have the lowest and Noble gases have the maximum IE.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313041
Which of the following is not a Dobereiner triad?
1 Cl,Br,I
2 Ca,Sr,Ba
3 Li, Na,K
4 Fe,Co, Ni
Explanation:
Dobereiner triads consist of elements of the same groups and hence Fe, Co, Ni do not constitute a Dobereiner triad.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313042
The law of triads is applicable to -
1 C, N, O
2 H, O, N
3 Na, K, Rb
4 Cl, Br, I
Explanation:
The law of triads is applicable to Cl, Br, I
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313043
Atomic weight of Cl = 35.5 and of I = 127. According to Dobereiner's triad rule atomic weight of Br will be:
1 80
2 162.5
3 81.25
4 91.5
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313044
How many of the following sets represent Dobereiner's triads? i. ii. iii. iv.
1 4
2 2
3 3
4 1
Explanation:
According to Dobereiner, the middle element have an atomic mass almost the average of the other two elements. Sets ii, iii and iv satisfy this conditions and hence, they represent Dobereiner's triads.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313045
The graph of first ionisation enthalpy versus atomic number is as follows : Which of the following statement is correct ?
1 Alkali metals are at the maxima and noble gases at the minima.
2 Noble gases are at the maxima and alkali metals at the minima.
3 Transition elements are at the maxima.
4 Minima and maxima do not show any regular behaviour.
Explanation:
In a period, alkali metals have the lowest and Noble gases have the maximum IE.
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CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313041
Which of the following is not a Dobereiner triad?
1 Cl,Br,I
2 Ca,Sr,Ba
3 Li, Na,K
4 Fe,Co, Ni
Explanation:
Dobereiner triads consist of elements of the same groups and hence Fe, Co, Ni do not constitute a Dobereiner triad.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313042
The law of triads is applicable to -
1 C, N, O
2 H, O, N
3 Na, K, Rb
4 Cl, Br, I
Explanation:
The law of triads is applicable to Cl, Br, I
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313043
Atomic weight of Cl = 35.5 and of I = 127. According to Dobereiner's triad rule atomic weight of Br will be:
1 80
2 162.5
3 81.25
4 91.5
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313044
How many of the following sets represent Dobereiner's triads? i. ii. iii. iv.
1 4
2 2
3 3
4 1
Explanation:
According to Dobereiner, the middle element have an atomic mass almost the average of the other two elements. Sets ii, iii and iv satisfy this conditions and hence, they represent Dobereiner's triads.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313045
The graph of first ionisation enthalpy versus atomic number is as follows : Which of the following statement is correct ?
1 Alkali metals are at the maxima and noble gases at the minima.
2 Noble gases are at the maxima and alkali metals at the minima.
3 Transition elements are at the maxima.
4 Minima and maxima do not show any regular behaviour.
Explanation:
In a period, alkali metals have the lowest and Noble gases have the maximum IE.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313041
Which of the following is not a Dobereiner triad?
1 Cl,Br,I
2 Ca,Sr,Ba
3 Li, Na,K
4 Fe,Co, Ni
Explanation:
Dobereiner triads consist of elements of the same groups and hence Fe, Co, Ni do not constitute a Dobereiner triad.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313042
The law of triads is applicable to -
1 C, N, O
2 H, O, N
3 Na, K, Rb
4 Cl, Br, I
Explanation:
The law of triads is applicable to Cl, Br, I
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313043
Atomic weight of Cl = 35.5 and of I = 127. According to Dobereiner's triad rule atomic weight of Br will be:
1 80
2 162.5
3 81.25
4 91.5
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313044
How many of the following sets represent Dobereiner's triads? i. ii. iii. iv.
1 4
2 2
3 3
4 1
Explanation:
According to Dobereiner, the middle element have an atomic mass almost the average of the other two elements. Sets ii, iii and iv satisfy this conditions and hence, they represent Dobereiner's triads.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313045
The graph of first ionisation enthalpy versus atomic number is as follows : Which of the following statement is correct ?
1 Alkali metals are at the maxima and noble gases at the minima.
2 Noble gases are at the maxima and alkali metals at the minima.
3 Transition elements are at the maxima.
4 Minima and maxima do not show any regular behaviour.
Explanation:
In a period, alkali metals have the lowest and Noble gases have the maximum IE.
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