Allotropes of Sulphur

Q. Which of the following statement(s) is/are correct regarding trigonal crystal system?

1. All three axial angles are not equal to ${90}^o$
2. All the three axial angles are equal to ${90}^o$
3. All the three axial lengths are equal
4. All the three axial angles and axial lengths are equal

Q. why oxoacid of phosphorus name ortho, pyro, hypo, phosphoric and phosphorus acid

Q. Which of the following Chalcogens shows the highest tendency for catenation?

1. Tellurium
2. Sulphur
3. Oxygen
4. Polonium

Q. 37. In which molecule all X---O Bond length present in molecule are equal. (where X is the central atom) 1)N2O5. 2)P4O6. 3)H2CO3. 4)P4O10

Q. in haber process 30 litres ofdihydrogen and 30 litres ofdinitrogen were taken for reaction which yielded only 50%of the expected product.what will be the composition of gaseous mixture under the aforesaid condition in the end

Q. The temperature at which $\alpha -sulphur$ changes into $\beta -sulphur$ is known as melting point.

1. True
2. False

Q.

Which combination is best explained by the co-ordinate covalent bond

1. 

2. 

3. 

4. 

Q. The temperature at which $\alpha -sulphur$ changes into $\beta -sulphur$ is known as melting point.

1. True
2. False

Q. Which of the following solids will show the given crystal lattice defect?

1. $AgBr$
2. Both (b) and (c)
3. $NaCl$
4. $AgCl$

Q.

Which of the following statements is(are) correct?

1. Rhombic sulphur is stable at room temperature.

2. Monoclinic sulphur is stable at room temperature.

3. Both rhombic and monoclinic sulphur are made of $S_8$ crystals.

4. Both rhombic and monoclinic sulphur are soluble in $C{S}_2$.

Q. In a rock salt structure $NaCl$ :

1. All the tetrahedral voids are filled
2. $C{l}^{-}$ ions form a ccp aarangment
3. All the octahedral voids are vacant.
4. $N{a}^{+}$ ions form a ccp aarangment

Q. Which is the most stable allotrope of sulphur?

Q. Which of the following molecule has no dative bond?(1) CO (2)( CO3)2- (3) (SO4)2 4) All of these

Q.

state the general characteristics of organic compound

Q. in haber process 30 litres of dihydroge under the aforand 30 litres of dioxygen were taken for reaction which yielded only 50 percent of expected product . what will be the composition of gaseous , mixture under the aforesaid condition in the end