General Science - Online Test
Q1.
Read the following statements :
i. when the heart is not pumping blood sufficient to meet the need of the body then this state is called as heart attack.
ii. when the heart stops beating due to irreversible death of cells then this state is called as heart failure.
Answer : Option C
Explaination / Solution:
The state when the heart is not pumping blood sufficient to meet the need of the body then this state is called heart failure. When the heart muscles is suddenly damaged due to inadequate blood supply is called heart attack.
Q2. In electron transport system, the oxidation of one molecule of NADH produces
Answer : Option B
Explaination / Solution:
Oxidation of one molecule of NADH gives rise to 3 molecules of ATP, while that of one molecule of produces 2 molecules of ATP.
Q3. The criterion of overlap of atomic orbitals is the main factor for the formation of
Answer : Option D
Explaination / Solution:
The valence bond theory is introduced to describe bonding in organic molecules. In this model, bonds are considered to form from the overlapping of two atomic orbitals on different atoms, each orbital containing a single electron.
In general, greater the overlap, stronger is the bond formed between the two atoms. Thus, according to the orbital overlap concept, atoms combine together by overlapping their orbital and thus forming a lower energy state where their valence electrons with opposite spin, pair up to form covalent bond.
Q4. The arm PQ of the rectangular conductor is moved from , outwards. The uniform magnetic field is perpendicular to the plane and extends from to and is zero for . Only the arm PQ possesses substantial resistance r. Consider the situation when the arm PQ is pulled outwards from to ,and is then moved back to with constant speed v. flux and emf for
Answer : Option B
Explaination / Solution:
ϕ=Blb
E=−dϕdt=0
Q5. Which one is most toxic
Answer : Option A
Explaination / Solution:
Out of the given gases carbon monoxide is the most toxic gas as it combine with hemoglobin present in blood and reduce the oxygen carrying capacity of blood.
Q6.
If the energy of a photon corresponding to a wave length of 6000 is 3.32 joule, the photon energy for a wavelength of 4000 will be
Answer : Option D
Explaination / Solution:
E=hcλE1E2=λ2λ13.32×1019E2=40006000E2=6×3.32×10194=4.98×1019J
Q7. For alkanes containing odd number of carbon atoms, Wurtz reaction is not preferred. Because
Answer : Option C
Explaination / Solution:
In wurtz reaction many side products are formens whwn two different alkyl halides are used.
Q8. The range of frequencies available for data transmission is known as
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. In the preparation of Sodium carbonate the by- product formed is:
Answer : Option D
Explaination / Solution:
is the by product.
Q10. Fourier series of a periodic rectangular pulse has a
Answer : Option B
Explaination / Solution:
No Explaination.
