Chemical Formula
Trending Questions
Q.
Let X and Y be two elements. The formula of a compound made up of X and Y is X2Y3. For a molecule of the compound, the ratio between the Y and X atoms is:
X2Cl
XCl2
X3Cl
XCl3
Q.
Subscripts in the chemical formula A3B8 denote 3 atoms of A are mixed with 8 atoms of B.
is true and B is false.
A is false and B is true.
Q.
The ratio of hydrogen atoms present in one molecule each of methane and ammonia is:
AlO2
Al2O3
Al3O2
AlO
Q. State two examples in each case and write their chemical formulae: (3 marks)
(i) Molecules having one kind of atoms only.
(ii) Molecules having two different kinds of atoms.
(iii) Molecules having three different kinds of atoms.
(i) Molecules having one kind of atoms only.
(ii) Molecules having two different kinds of atoms.
(iii) Molecules having three different kinds of atoms.
Q.
The correct representation of the chemical formula of common salt is
nacl
NaCl
NACL
NaCL
Q.
The total number of atoms in 2C6H12O6 is:
is true and B is false.
A is false and B is true.
Both A and B are true
Both A and B are false
Q. Chemical formula of a compound is determined on the basis of __________ of its constituents.
- number of neutrons
- valency
- atomic mass
- atomic size
Q. The camber provided on a sloping road is 1 in 48. Which one of the following is the ruling gradient?
- 1 in 20
- 1 in 15
- 1 in 30
- 1 in 24