General Science - Online Test
Q1. What is the final product of Glycolysis?
Answer : Option B
Explaination / Solution:
Glycolysis involves the breaking down of a sugar (generally glucose, although fructose and other sugars may be used) into more manageable compounds in order to produce energy. The net end products of glycolysis are two Pyruvate, two NADH, and two ATP
Q2. Monovalent sodium and potassium ions found in large proportions in biological fluids. They help in
Answer : Option A
Explaination / Solution:
Na and K ions help in transmission of nerve impulses , in regulating the flow of water accross the cell membranes and in the transport of sugar and amino acids in to cells. so monovalent sodium and potassium ions found in large proportions in biological fluids
Q3. First organic acid produced by microbial fermentation is
Answer : Option D
Explaination / Solution:
Lactic acid occurs in two isomeric forms i.e. L (+) and D (-) isomers, and as a racemic mixture (DL-lactic acid). The isolation of lactic acid from milk was done in 1798. It was the first organic acid produced by microorganisms in 1880. Today, lactic acid is competitively produced both by microbiological and chemical methods.
Q4. Delocalisation of σ-electrons of C -H bond of an alkyl group directly attached to an atom of unsaturated system or to an atom with an unshared p-orbital is called :
Answer : Option D
Explaination / Solution:
The interaction of the electrons in a sigma bond (usually C–H or C–C) with an adjacent empty (or partially filled) non-bonding p-orbital, antibonding σ or π orbital,or filled π orbital, to give an extended molecular orbital that increases the stability of the system is Hyperconjugation.
Q5. According to Lenz’s law
Answer : Option B
Explaination / Solution:
Direction of an induced emf, or the current, in any circuit is such as to oppose the cause that produce it.
If the direction of the induced current were such as not to oppose then we would be obtaining electrical energy continuously without doing work, which is impossible
Q6. In various experiments on photo electricity the stopping potential for a given frequency of the incident radiation
Answer : Option B
Explaination / Solution:
The stopping potential is defined as the potential necessary to stop any electron even the electron with the most kinetic energy from reaching the other plate. By changing radiation intensity only no.of emitted electron changes their Kinetic energy will not change.
Q7.
Read the following statements:
i. carbondioxide is a qualitative pollutant.
ii. carbondioxide is already present in environment and is termed as pollutant when it’s concentration increases in the environment:
Answer : Option B
Explaination / Solution:
Carbon dioxide is a quantitative pollutant. This gas is already present in environment in small quantity. When its concentration increases in the environmentit is termed as pollutant. It may cause greenhouse effect also.
Q8. Precision and Accuracy refer to _______ of various measurements for the same quantity repeatedly and agreement of a particular value to the ------- -------- of the result , respectively.
Answer : Option A
Explaination / Solution:
Precision means closeness of all the data values measured while accuracy means closeness of particular value with the real value.
For example ,
when the reported values are 2.01, and 1.99 g as the result and its truevalue is 2.00 g .
These values are both precise and accurate.
Q9. In the reaction, R – X + NaoR’ → ROR’ + X ( – ve ion) The main product formed is
Answer : Option A
Explaination / Solution:
This is normal substitution reaction.
Q10. Which of the following is the appropriate definition of a computer?
Answer : Option B
Explaination / Solution:
No Explaination.
