[" Aluminium is diagonally related to (in periodic table) "],[" [CPMT "1988;" MP PET "1993;" Pb.CET "2003;" MP PMT "2006]],[[" (a) "Li," (b) "C],[" (c) "B," (d) "Be]]

.Which of the following combination is incorrect in relation to periodic table? 1) Dobereiner's triads "- Li,Na,"K 2) Eka - Aluminium - germanium 3) Lothermeyer - plotted the physical properties such as atomic volume against atomic weight 4) Inverted pair-Te, I

A group of elements in the Periodic Table are given pelow (Boron is the first member of the group and Thallium is the last). Boron Aluminium Gallium Indium Thallium Answer the following questions in relation to the above group of elements : The atomic number of Boron is 5. Write the chemical formula of the compound formed when Boron reacts with Chlorine.

How many of the following statements are correct according to Mendeleef's period table ? (a) Mendeleef corrected the atomic weight of Be, In and Os b) Ar-k, Te-I and Co-Ni are anomalous pairs. c) Atomic weights of elements were corrected by using the relation Atomic Wt. (Eq.Wt) (valency) d) Eka baron is scandium e) Eka silicon is germanium f) Eka aluminium is galium g)This classification is based on valency h) Mendeleef's law is based on atomic weights

A group of elements in the Periodic Table are given pelow (Boron is the first member of the group and Thallium is the last). Boron Aluminium Gallium Indium Thallium Answer the following questions in relation to the above group of elements : If the electronic configuration of Aluminium is 2, 8, 3, how many electrons are there in the outer shell of Thallium ?

A group of elements in the Periodic Table are given pelow (Boron is the first member of the group and Thallium is the last). Boron Aluminium Gallium Indium Thallium Answer the following questions in relation to the above group of elements : Will the elements in the group to the right of this Boron group be more metallic or less metallic in character ? Justify your answer.

PASSAGE - 1: In Mendeleeff's periodic table elements were classified on the basis of atomic weight & in modern periodic table on the atomic number. The lighter elements of 2 & 3 periods show similarities in their properties called diagonal relationship Due to digonal relation which pair are amphoteric in nature

Study the following table carefully to answer these questions : Income and expenditure of company A during the period 2001 to 2006. Profit/Loss = Income - Expenditure % Profit/Loss = ("Income - Expenditure")/("Expenditure")xx100 What is the percentage increase in expenditure from 2002 to 2003 ?

A group of elements in the Periodic Table are given pelow (Boron is the first member of the group and Thallium is the last). Boron Aluminium Gallium Indium Thallium Answer the following questions in relation to the above group of elements : Which element would be expected to have the highest electronegativity ?

A group of elements in the Periodic Table are given pelow (Boron is the first member of the group and Thallium is the last). Boron Aluminium Gallium Indium Thallium Answer the following questions in relation to the above group of elements : Which element has the most metallic character ?