General Science - Online Test
Q1. Which of the following statements is not true about classical smog?
Answer : Option B
Explaination / Solution:
Classical smog main components are not produced by the action of sunlight on emissions of automobiles and factories. It is actually the photochemical smog.
Q2. In an insulated vessel, 250 g of ice at 0C is added to 600 g of water at 18.0C. How much ice remains when the system reaches equilibrium?
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. The atom with the given atomic number Z=17, and the atomic mass A=35.5 is
Answer : Option B
Explaination / Solution:
Here l = 3 means the sub shell is f and
n = 4 means it is present in 4th orbit. Finally it is a 4f sub shell.
The no of orbital in f sub shell =2l+1=2×3+1=7
Each orbital can accommodate 2 electrons. 7×2=14 electrons.
Maximum number of electrons in a sub shell with l=3 and n=4 (4f) is 14 electrons.
Q4. Given that r = 0.42, cov(x,y) = 10.5, var(x) = 16; Find the standard deviation of y.
Answer : Option A
Explaination / Solution:
Q5. Mid day meal, Public distribution system, integrated child development scheme etc.
Answer : Option D
Explaination / Solution:
The basic needs approach is one of the major approaches to the measurement of absolute poverty in developing countries. Many modern lists emphasize the minimum level of consumption of 'basic needs' of not just food, water, clothing and shelter, but also sanitation, education, and healthcare.
Q6. Select the incorrect matching
Answer : Option C
Explaination / Solution:
The nucleus contains the chromosomes which in turn contain the genetic material, DNA.
Q7.
Match the following, options are
Answer : Option C
Explaination / Solution:
a. If a researcher wanted to create a systematic sample of 1,000 students at a university with an enrolled population of 10,000, he or she would choose every tenth person from a list of all students.
b. Data is selected based on characteristics of a population and the objective of the study.
c. The researcher first selects groups or clusters and then from each cluster, selects the individual subjects either by simple random sampling or systematic random sampling.
d. One might divide a sample of adults into subgroups by age, like 18-29, 30-39, 40-49, 50-59, and 60 and above. To stratify this sample, the researcher would then randomly select proportional amounts of people from each age group.
Q8. Board which investigate, collect and disseminate information relating to water, air and pollution, lay down standards of sewage/trade effluent and emissions
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. A gene of operon which synthesizes a repressor protein is
Answer : Option C
Explaination / Solution:
No Explaination.
Q10. A weightless spring which has a force constant k oscillates with frequency n when a mass m is suspended from it. The spring is cut into two equal halves and a mass 2m is suspended from it. The frequency of oscillation will now become
Answer : Option D
Explaination / Solution:
No Explaination.
