The mass number of a nucleus is (a) Always less than its atomic number (b) Always more than its atomic number (c) Sometimes more than and sometimes equal to its atomic number (d) None of the above2 23580
The maximum KE of the photoelectron emitted from a surface is dependent on (a) The intensity of incident radiation (b) The potential of the collector electrode (c) The frequency of incident radiation (d) The angle of incidence of radiation of the surface1 2206
Which of the following is not an essential condition for interference (a) The two interfering waves must be propagated in almost the same direction or the two interfering waves must intersect at a very small angle (b) The waves must have the same time period and wavelength (c) Amplitude of the two waves should be the same (d) The interfering beams of light must originate from the same source.1 3822
When X-Ray photons collide with electrons (a) They slow down (b) Their mass increases (c) Their wave length increases (d) Their energy decreases.1 4869
An electron emits energy (a) Because its in orbit (b) When it jumps from one energy level to another (c) Electrons are attracted towards the nucleus (d) The electrostatic force is insufficient to hold the electrons in orbits.1 1723
In a balanced chemical equation (a) Atoms are conserved (b) Molecules are conserved (c) Moles are conserved (d) Reactant and product molecules are preserved.1 19245
How many grams of NaOH will react with 0.2 equivalent of HCl? (a) 0.59 (b) 0.285 (c) 1.18 (d) none of these.2 3871
Which of the following is least acidic (a) Ortho-cresol (b) Para-cresol (c) Phenol (d) Meta-cresol.1 2670
In Reimer-Tiemann?s reaction, the reaction intermediate is (a) Carbene (b) Dichloro carbene (c) Carbonion (d) Carbonium ion.1 8722
Which of the following is most acidic? (a) C2H5OH (b) CH3CHOHCH3 (c) Ethanol (d) CH3OH.1 3716
A catalyst (a)always slows down the reaction (b)always starts a rection that would not have ocurred at all otherwise (c)causes changes in the rate of the reaction (d)changes the quantities of the products formed.1 1760
The rate of the first order reaction depends on the (a) Concentration of the reactant (b) Concentration of the product (c) Time (d) Temperature.1 1895
Integrate 3x + 5 / (x3-x2-x+1)?919
What is Phantom Gene Sequence?
How can we find the direction of an nucleotide substitution, for example; C to T or T to C?
What is the criteria for LTQ (LC-MS/MS) SEQUEST search?
Describe the aim of microarray data analysis?
what is the image of point (3,8) in the line x + 3y = 7 ?
How a cluster algorithm works?
What are oesophageal molecular markers?
What is the difference in terms of connectivity between a scale free network and random network?
what is the principle involved in Biometry?
How the Algorithm works?
What is a DNA array?
Define perl and clustalW problem?
Integrate 3x + 5 / (x3-x2-x+1)?
What is the input and outpit of a distance based algorithm?
How long will a train 100m long traveling at 72kmph take to overtake another train 200m long traveling at 54kmph?