General Science - Online Test
Q1. If a film of width L is stretched in the longitudinal direction a distance d by force F, surface tension is given by
Answer : Option C
Explaination / Solution:
Let L be the width of the film. Since the film has two surfaces, the total length along which the surface force acts on the slider is 2L. The surface tension S in the film is defined as the ratio of the surface force F to the length d (perpendicular to the force) along which the force acts
S=F/d
Hence, in the case, d = 2L
S=F/2L
Q2. Which one is not shown by plasmolysis
Answer : Option A
Explaination / Solution:
Plasmolysis is the shrinking of cell membrane due to exosmosis. Plasmolysis shows that cell membrane is semipermeable and elastic but do not show that cell wall is semipermeable.
Q3. Dislocation defect is also known as
Answer : Option D
Explaination / Solution:
In frenkel defect cation gets dislocated from its position.
Q4. Cardiac muscles are
Answer : Option A
Explaination / Solution:
Cardiac muscle tissue is a contractile tissue present only in the heart. The cardiac muscle fibres are elongated, branched and uninucleate. They appear striated due to the presence of alternate light and dark band. Cardiac muscles are self-contracting and involuntary in nature. They contract in rythmic fashion and help the heart to pump the blood.
Q5. The blue-green algae are also referred as
Answer : Option D
Explaination / Solution:
Blue green algae are also called as cyanobacteria. They are considered as most primitive organism that still survives. It includes different forms of unicellular and multicellular organisms.
Q6. If change in Gibbs energy ΔG is negative (< 0) at constant pressure and temperature
Answer : Option B
Explaination / Solution:
ΔG gives a criteria for spontaneous and non spontaneous process at constant temperature and pressure. ΔG < 0 (negative) means reaction is spontaneous and ΔG >0 (positive) means reaction is non spontanenous.
Q7. A company hires regular services from external sources mostly from other countries which were previously provided internally
Answer : Option D
Explaination / Solution:
Outsourcing is the contracting of business processes to external firms usually in developing countries where labour costs are cheaper.
Q8. Balance of trade is in surplus when
Answer : Option A
Explaination / Solution:
A trade surplus is an economic measure of a positive balance of trade, where a country's exports exceed its imports. A trade surplus represents a net inflow of domestic currency from foreign markets. trade surplus helps to strengthen a country’s currency; however, this is dependent on the proportion of goods and services of a country in comparison to other countries as well as other market factors. Countries can also highly control their currency through foreign investment efforts.
Q9. Which information is false regarding Lorenz curve
Answer : Option D
Explaination / Solution:
The Lorenz curve, developed by Max O Lorenz in 1905, is a graphical representation of the distribution of the income or of wealth. It is used to represent inquality of the wealth distribution.
Q10. Ionization enthalpy increases across a period because
Answer : Option C
Explaination / Solution:
Consider moving from lithium to fluorine across the second period, where successive electrons are added to orbitals in the same principal quantum level. The shielding of the nuclear charge by the inner core of electrons does not increase very much to compensate for the increased attraction of the electron to the nucleus. Thus, across a period, increasing nuclear charge outweighs the shielding. Consequently, the outermost electrons are held more and more tightly and the ionization enthalpy increases across a period.
