Introduction to p Block Elements

Q.

Electronic Configuration Of Co³⁺

Q.

What is the oxidation number of phosphorous?

Q.

Whether calcium is said to be a metal or non-metal?

Q.

What is the first element on the periodic table?

Q. Which of the following structure is similar to graphite?
(correct answer +1, wrong answer -0.25)

1. $B_2{H}_6$
2. $BN$
3. $B_{4}C$
4. Boron

Q.

The second most abundant metal in the earths crust is

1. Iron

2. Aluminium

3. Copper

4. Zinc

Q. Group 13 elements exhibit

1. Only +3 Oxidation state
2. Only + 1 oxidation state
3. Both +1 and +3 oxidation states
4. +1, +2 and +3 oxidation states.

Q.

Phosphorus has the oxidation state of +3 in?

Q.

Which of the following oxide is amphoteric in nature

1. ${\mathrm{Na}}_2\mathrm{O}$

2. ${\mathrm{Li}}_2\mathrm{O}$

3. ${\mathrm{K}}_2\mathrm{O}$

4. $\mathrm{BeO}$

Q.

Why the size of aluminium is greater than the size of gallium?

Q. Actinoids shows variable oxidation state.why?

Q.

What are hypervalent species?

Q.

What is valency? Explain it with an example.

Q.

Inert pair effect is predominant in:

Q.

What are the number of groups that belong to the p-block called?

Q. Zr and Hf exhibit similar properties

Q.

Give reasons for the following:

Aluminum oxide is amphoteric

Q. How many electrons have the values n = 2, l = 1 and in the configuration 1s22s22p3? Options: Should have chosen 1 Wrong 3 5 7

Q.

How to find the average atomic mass of sulfur from the following data:

$\mathrm{S}-3295.002\%(31.972),\mathrm{S}-330.76\%(32.971),\mathrm{S}-344.22\%(33.967),\mathrm{and}\mathrm{S}-360.014\%(35.967)$?

Q.

Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.

Q.

The valence shell electronic configuration of magnesium is ________

Q. How many electrons can fit in the orbital for which $n=3$ and $l=1$?

1. 14
2. 10
3. 6
4. 2

Q.

Perform an experiment to show that particles in matter are constantly in motion.

Q.

why are the elements of s block more bigger than d block elements?

Q.

Discuss the general charcteristic of group 15 elements with reference to their configuration, oxidation state, atomic size, ionization enthalpy and electronegativity.

Q.

Why is the positive ion always smaller than the corresponding neutral atom?

Q.

The attractive force hold together the molecules of matter are called ________

Q.

Which one of the following is an amphoteric oxide?

1. ${\mathrm{Na}}_2\mathrm{O}$

2. ${\mathrm{SO}}_2$

3. ${\mathrm{B}}_2{\mathrm{O}}_3$

4. $\mathrm{ZnO}$

Q.

Which group in the periodic table contains elements that exist in all three states of matter at room temperature? Mention the members of this group along with their atomic numbers and physical states at room temperature for their molecules.

Q. Why is $B_2$ paramagnetic whereas $C_2$ diamagnetic?