General Science - Online Test
Q1. For the reaction
of is combusted in 1000 g of O2. The yield of and the limiting agent in the reaction are
of is combusted in 1000 g of O2. The yield of and the limiting agent in the reaction are
Answer : Option C
Explaination / Solution:
moloes of given = 51.72 mol Moles of O2 = 31.25 mol. Since 2 mol of requires 13 mol of so 51.72 mol of require 336.18 mol of but we have is only 31.25 mol therefore is limiting reagent. Therefore 13 mol of gives 10 mol of so 31.25 mol will give 24.038 mol of water = 432 g of water.
Q2. Strong Nuclear Force has
Answer : Option C
Explaination / Solution:
Strong Nuclear Force : The nucleus is held by the forces which protect them from the enormous repulsion forces of the positive protons. It is a force with short range and not similar to the electromagnetic force. We know that the nucleus is made up with its fundamental particles that are the protons and neutrons. These are formed with quarks which are held together with strong force. This strong force is residual color force. The basic exchange particle is called gluon which works as mediator forces between quarks. Both the particles; gluons and quarks are present in protons and neutrons.
Q3. If two negatively sloped demand curves intersect then elasticity of demand at the point of intersection will be
Answer : Option A
Explaination / Solution:
No Explaination.
Q4. A boy comes running and sits on a merry-go-round. What is conserved?
Answer : Option A
Explaination / Solution:
According to law of conservation of angular momentum if no external torque is applied on a body in rotation than its angular momentum remains conserved.
Q5. A liquid drop of radius R is broken up into N small droplets. The work done is proportional to
Answer : Option D
Explaination / Solution:
No Explaination.
Q6. The aqueous solution of sugar does not conduct electricity. However, when sodium chloride is added to water, it conducts electricity. How will you explain this statement on the basis of ionisation and how is it affected by concentration of sodium chloride?
Answer : Option A
Explaination / Solution:
NaCl ionises completely in water and increase in concentration of salt increases conductance.
Q7. Both WBC and RBC are formed in the
Answer : Option C
Explaination / Solution:
In adults, both WBC and RBC are formed in the bone marrow that is located in long bones such as thighs.
Q8. Who demonstrated that the extract of the infected plants of tobacco could cause infection in healthy plants?
Answer : Option A
Explaination / Solution:
Beijerinek is considered one of the founders of virology. In 1898, he published results on the filtration experiments demonstrating that tobacco mosaic disease is caused by an infectious agent smaller than a bacterium and called the fluid as Contagiumvivum fluidum(infectious living fluid).
Q9. A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic hydrocarbon.
The derivative is ______.
Answer : Option D
Explaination / Solution:
1,4 - dibromobutane ( ie. a dibromoderivative of an alkane , butane) when reacted withl in ethereal solution produces alicyclic hydrocarbon, Cyclobutane as per following reaction.
Therefore , the dibromo-derivative of alkane is identified as 1 , 4-dibromobutane.
Q10. Non-tariff barriers mainly include
Answer : Option C
Explaination / Solution:
Non tariff barriers include restrictions on both the quantity and quality of the commodity that can be imported. Commodities can be imported neither in a higher quantity nor of a lower quality than specified.
