General Science - Online Test
Q1. Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. What is the change in internal energy of the gas?
Answer : Option B
Explaination / Solution:
Internal energy depends on temperature and temperature remains constant because system is thermally insulated. so that change in internal energy will be zero.
Q2. Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter
Answer : Option D
Explaination / Solution:
Simplest organisms could not have originated spontaneously from non-living matter. This can be shown as meat was not spoiled when heated and kept sealed in vessels.
Q3.
What will be the pressure exerted by a mixture of 3.2 g of methane and 4.4 g of carbon dioxide contained in a 9 flask at ?
Answer : Option C
Explaination / Solution:
P=P1+P2 (Acc. To Daltons Law) And P1×9=0.2xRT And P2×9=0.1xRT where T= 300K
Q4. The following structure of protein is called
Answer : Option A
Explaination / Solution:
Tertiary structure is this structure.
Q5. A correct explanation of this statement – “The LD50 of DDT is 87mg/kg, for rats, by mouth.” is …
Answer : Option D
Explaination / Solution:
No Explaination.
Q6.
The ionization constant of an acid, , is the measure of strength of an acid. The Ka values of acetic acid, hypochlorous acid and formic acid are respectively. Which of the following orders of pH of 0.1 mol dm-3 solutions of these acids is correct?
Answer : Option B
Explaination / Solution:
pH=-log(cα) , Ka= . Lesser is the pH value greater is acidity. Also greater is Ka, lesser will be acidity.
Q7. Reticulate veination is characteristic in
Answer : Option C
Explaination / Solution:
Reticulate venation: In this type, the veins branch and unite forming a complicated network, All the veins are interconnected, like the strands of the net. Leaves of ‘Dicot plants’ generally have reticulate venation e.g., Hibiscus, Redgram
Q8. In which of the models An atom has a nearly continuous mass distribution?
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. A group of closely related classes is called
Answer : Option C
Explaination / Solution:
Genus comprises a group of related species, Family has a group of related genera, order has a group of related family. Hence, the correct option is Phylum.
Q10. Abscissic acid is also known as
Answer : Option D
Explaination / Solution:
ABA stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stresses.Therefore, it is also called the stress hormone.
