-
1)
A polymer of empirical formula CH3 has molar mass of 26000 gmole-1. Its molecular formula will be :
- A) 100 times of its empirical formula
- B) 200 times of its empirical formula
- C) 500 times of its empirical formula
- D) 2000 times of its empirical formula
-
2)
The number of molecules in 9.8g of ice (H2O):
- A) 6.02×1023
- B) 3.01×1023
- C) 6.02×1023
- D) 6.02×1022
-
3)
Ice is less dense than water at:
- A) O degree C
- B) 4 degree C
- C) -4 degree C
- D) 2 degree C
-
4)
At a given temperature and pressure, the one which shows marked deviation from ideal behavior is:
- A) N2
- B) H2
- C) CO2
- D) He
- A) N2
-
5)
When the two partially filled atomic orbitals overlap in such a way that the probability of finding the electron is maximum around the joining the two nucelei, the result is the formation of:
- A) Sigma bond
- B) Pi-Bond
- C) Hydrogen bond
- D) Metallic bond
-
6)
The suitable representation of dot structure of chlorine molecule is:
- A) :Cl: :Cl: ( dots above Cl on both sides)
- B) :Cl : Cl: (dots above and down on Cl both sides)
- C) Cl :: Cl (Dots on above Cl on both sides)
- D) Cl : Cl (Dots `` on only above of Cl at both sides)
-
7)
2H2 + O2 ------------------► 2H2O+285.5 KJmol-1
What will be the change in the above reaction?
- A) 285.5 KJ/mol
- B) Zero KJ/mol.
- C) -285.5 KJ/mol.
- D) 1 KJ/mol.
-
8)
In SO4-2 the oxidation number of sulpphur of is:
- A) -8
- B) +8
- C) -6
- D) +6
-
9)
Coinage metals Cu, Ag and Au are the least reactive because they have:
- A) Negative reduction potential
- B) Positive reduction potential
- C) Negative oxidation potential
- D) Positive oxidation potential
-
10)
What will be pH of a solution of NaOH with concentration of 10-3M?
- A) 3
- B) 14
- C) 11
- D) 7
