Find the temperature at which the below reaction will be in equilibrium if the enthalpy and entropy change for the reaction is 30 Kj mol-1 and 105 J K-1 mol-1 respectively
Br2(l) + Cl2(g) → 2BrCl(g)
(A) 273 K
(B) 300 K
(C) 450 K
(D) 285.7 K
Why do we boil the extract with conc. HNO3 in Lassaigne’s test for halogens?
(A) To increase the concentration of NO3- ions
(B) To increase the solubility product of AgCl
(C) It increases the precipitation of AgCl
(D) For the decomposition of Na2S AND NaCN formed
What is the molecular mass of gas?
(A) twice its vapor pressure
(B) equal to its vapor pressure
(C) half of its vapor pressure
(D) independent of its vapor pressure
What is mainly present in natural gas?
(A) Ethane
(B) Butane
(C) Propane
(D) Methane
What is the substance formed as a result of the reaction of acids and bases called?
(A) Salt
(B) Easter
(C) Alcohol
(D) Acid
What is the PH level of blood of a normal person?
(A) 3.5 - 4.5
(B) 7.35 - 7.45
(C) 5.45 – 6.55
(D) 7.35 - 7.55
Which of the following is not a non-metal?
(A) Sulfur
(B) Aluminum
(C) Carbon
(D) Nitrogen
The atomic weight of which element is taken as the standard?
(A) Carbon
(B) Gold
(C) Helium
(D) Oxygen
When a helium atom loses an electron it becomes:
(A) Negative Helium Ion
(B) Proton
(C) Alpha Particle
(D) Positive Helium Ion
The mass number is the sum of the?
(A) Proton and Neutron
(B) Proton Only
(C) Electron and Proton
(D) Electron and Neutron
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