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 5991An 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 2664In a balanced chemical equation (a) Atoms are conserved (b) Molecules are conserved (c) Moles are conserved (d) Reactant and product molecules are preserved.
1 21938How 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 5241Which of the following is least acidic (a) Ortho-cresol (b) Para-cresol (c) Phenol (d) Meta-cresol.
1 3732In Reimer-Tiemann?s reaction, the reaction intermediate is (a) Carbene (b) Dichloro carbene (c) Carbonion (d) Carbonium ion.
1 11213A 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 2945The rate of the first order reaction depends on the (a) Concentration of the reactant (b) Concentration of the product (c) Time (d) Temperature.
1 2870If the sum of n terms of two series of A.P are in the ratio 5n+4:9n+6 .find the ratio of their 13th terms?
1 4319If the letters of the word ?rachit? are arranged in all possible ways and these words are written out as in a dictionary, what is the rank of the word ?rachit?. (a) 485 (b) 480 (c) 478 (d) 481
8 37022Post New Wipro Bio Informatics Interview Questions
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