Chemistry
The figure given below shows the molecule of an element, where 'a' denotes the atom with atomic mass 32.
P — Element is tetratomic with molecular mass 128.
Q — Element is octatomic with molecular mass 256.
R — Element is crown-shaped with molecular mass 256.
Only P
Only Q
Only R
Both P and R
Chemical Compound
11 Likes
Answer
Only Q
Reason — Given element 'a' is having atomic mass 32. The figure shows there are eight 'a' atoms forming a octatomic molecule. So when we calculate the molecular mass it will be
32 x 8 = 256
Hence, element 'a' is octatomic molecule with molecular mass 256.
Answered By
6 Likes
Related Questions
In the compound magnesium nitride (Mg3N2):
P — Mg is trivalent, N is divalent.
Q — Mg is divalent. N is trivalent.
R — Mg is divalent, N is divalent.
Which of the statements given above is/are true?
Only P
Only Q
Only R
Both P and Q
Copper shows variable valency and forms two different compounds with oxygen — Cu2O and CuO.
P — A is cuprous oxide, B is cupric oxide.
Q — A is cupric oxide, B is cuprous oxide.
R — A is copper (I) oxide, B is copper (II) oxide.
Only P
Only Q
Only R
Both P and R
Fill in the blanks:
(a) Dalton used symbol …………… for oxygen and …………… for hydrogen.
(b) Symbol represents …………… atom of an element.
(c) Symbolic expression for a molecule is called …………… .
(d) Sodium chloride has two radicals. Sodium is a …………… radical while chloride is a …………… radical.
(e) Valency of phosphorus in PCl3 is …………… and in PCl5 is …………… .
(f) Valency of Iron in FeCl2 is …………… and in FeCl3 it is …………… .
(g) Formula of iron (III) carbonate is …………… .
Name the following compounds and state how many atoms of each kind are present in one molecule of these compounds.
(a) H2SO4
(b) HClO4
(c) K2Cr2O7
(d) KMnO4
(e) K4[Fe(CN)6]
(f) Na2CrO4
(g) Mn3(BO4)2
(h) HNO2