Latest Science GK Questions and Answers
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
Correct Answer : D
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
Correct Answer : D
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
Correct Answer : A
What is mainly present in natural gas?
(A) Ethane
(B) Butane
(C) Propane
(D) Methane
Correct Answer : D
What is the substance formed as a result of the reaction of acids and bases called?
(A) Salt
(B) Easter
(C) Alcohol
(D) Acid
Correct Answer : A
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
Correct Answer : B
Which of the following is not a non-metal?
(A) Sulfur
(B) Aluminum
(C) Carbon
(D) Nitrogen
Correct Answer : B
The atomic weight of which element is taken as the standard?
(A) Carbon
(B) Gold
(C) Helium
(D) Oxygen
Correct Answer : A
When a helium atom loses an electron it becomes:
(A) Negative Helium Ion
(B) Proton
(C) Alpha Particle
(D) Positive Helium Ion
Correct Answer : D
The mass number is the sum of the?
(A) Proton and Neutron
(B) Proton Only
(C) Electron and Proton
(D) Electron and Neutron
Correct Answer : A
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Rajesh Bhatia
A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.
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