Octet Rule

Q. Can someone explain to me what n factor/valency factor is? With some examples

Q. Which of the following does not obey octet rule?

1. $H_{2}O$
2. $O_2$
3. $C{O}_2$
4. $NO$

Q.

Explain the formation of sodium chloride.

Q. What is a brine solution?

1. salt
2. salt water
3. sweet
4. sweet water

Q.

How many valence electrons does Bromine have?

Q. Diamond has a three dimensional structure of $C$ atoms formed by covalent bonds. The structure of diamond has face centred cubic lattice where $50\%$ of the tetrahedral voids are also occupied by carbon atoms. The number of carbon atoms present per unit cell of diamond is____________

Q.

Which metal is used in photoelectric cell?

Q.

Why can oxygen only make 2 bonds?

Q.

What is the valency of Sodium?

Q.

How do you calculate the dipole moment of water?

Q. a monoatomic gas at pressure p1 and volume v1 is compressed adiabatically to 1/8 th its original volume .what is the final pressure of tje gas

Q. Stability of the species $L{i}_2$, $L{i}_2^{-}$ and $L{i}_2^{+}$ increases in the order of:

1. $L{i}_2<L{i}_2^{+}<L{i}_2^{-}$
2. $L{i}_2^{-}<L{i}_2^{+}<L{i}_2$
3. $L{i}_2<L{i}_2^{-}<L{i}_2^{+}$
4. $L{i}_2^{-}<L{i}_2<L{i}_2^{+}$

Q. $N{O}_2$ does not obey octet rule because:

1. It has odd number of electrons
2. Nirogen cannot obey octet in its compounds
3. None of the above
4. It has extended octet

Q. For a certain process , pressure of diatomic gas varies according to the relation P= aV2( v has power 2), where a is constant . what is the molar heat capacity of the gas for this process?

Q.

The ratio of Hydrogen to Oxygen in water is _____.

Q. Actinides exhibit larger number of oxidation state than that of corresponding lanthanides. The reason behind this aspect is

1. larger atomic size of actinides than the lanthanides
2. lesser energy difference between $5f$ and $6d$ -orbitals than between $4f$ and $5d$-orbitals.
3. more energy difference between $5f$ and $6d$ orbitals than between $4f$ and $5d$-orbitals
4. greater reactive nature of the actinides than the lanthanides

Q. Octet rule is applicable to which of the following species?

1. $Br{F}_5$
2. $S{F}_6$
3. $C{O}_2$
4. $I{F}_7$

Q. A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is,

1. Trigonal pyramidal
2. See-saw
3. T-shaped
4. Trigonal planar

Q.

What is a carbon compound? Name the various types of carbon compounds?

Q. Are all the five bonds in $PC{l}_5$ molecule equivalent? Justify your answer.

Q.

What is Group 12 on the periodic table called?

Q.

What is chemical bonding?

Q. An open vessel at 27C is heated until three fifth of the gas has been expelled out assuming that volume of vessel remain constant the temperature of which the vessel has been heated was

Q. Which of the following molecules follows octet rule?

1. $Xe{F}_2$
2. $S{F}_4$
3. $PC{l}_3{F}_2$
4. $SiC{l}_4$

Q.

Based on the intermolecular forces of attraction, how can we classify solids as Ionic, Covalent, Molecular or Metallic and in Molecular as polar, non polar and hydrogen bonded?

Q.

The intermolecular forces between two benzene molecules are of nearly the same strength as those between two toluene molecules. For a mixture of benzene and toluene, which of the following are not true?

1. These will form minimum boiling azeotrope.
   
   
2. ${\Delta }_{mix}V=\text{zero}$
   
   
3. 
   These will not form an ideal solution
4. ${\Delta }_{mix}H=\text{zero}$
   
   

Q.

Draw electron dot structure of butane.

Q. Is melting point of a compound is directly proportional to its atomic mass? If so then why?

Q.

Name the functional group present in the following compound.

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}$

Q.

Which of the following elements shows +7 oxidation state?

1. Sc

2. Zn

3. Mn

4. Fe