List of top Questions asked in NEET (UG)

Which of the following statements is not true:

The e.m.f. of a Daniell cell at 298 K is E1. Zn/SO4 (0.01 M) || CuSO4 (1.0 M)/Cu. When the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the e.m.f. is changed to E2. What is the relationship between E1 and E2 ?

On the basis of the information available from the reaction: \(\frac 43 Al+O_2→\frac 23 Al_2O_2\), ∆G = -827 KJ mol-1 of O2, the minimum e.m.f. required to carry out electrolysis of Al2O3 is (F = 96500 C mol–1)
In Haber process $30\,L$ of dihydrogen and $30\,L$ of dinitrogen were taken for reaction which yielded only $50\%$ of the expected product. What will be the composition of gaseous mixture under the aforesaid condition in the end?
The molarity of pure water is:
The major role of minor elements inside living organisms is to act as:
Which one of the following pairs is not correctly matched:
Which of the following discoveries resulted in a Nobel Prize:

Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder:

In recent years,DNA sequences (nucleotide sequence) of mt-DNA and Y chromosomes were considered for the study of human evolution,because:

The term "antibiotic" was coined by : -
Which of the following plants are used as green manure in crop fields and in sandy soils:
In a random mating population in equilibrium, which of the following brings about a change in gene frequency in a non-directional manner:

Industrial melanism is an example of:

Which one of the following statements about viruses is correct ?
Viruses are no more 'alive' than isolated chromosomes because
A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved the new value of the magnetic field is
An observer moves towards a stationary source of sound with a speed \(\frac {1}{5}^{th}\) of the speed of sound. The wavelength and frequency of the source emitted are λ and f respectively. The apparent frequency and wavelength recorded by the observer are respectively:
During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called:
Following diagram performs the logic function of:
logic function
The pyknometric density of sodium chloride crystal is 2.165×103 kg m–3 while its X-ray density is 2.178×103 kg m–3. The fraction of unoccupied sites in sodium chloride crystal is:

Three capacitors each of capacity 4µF are to be connected in such a way that the effective capacitance of 6µF. This can be done by

Which one of the following octahedral complexes will not show geometric isomerism? (A and B are monodentate ligands)
The number of unpaired electrons in the complex ion \([CoF_6]^{3–}\) is: (Atomic No.of Co = 27) 
Which one of the following characteristics of the transition metals is associated with their catalytic activity: