Questions and answers by

marjani

Questions (17)

a radioactive material is undergoing nuclear decay. After 40 minutes, 25% of the sample remains. What is the half-life of the
1. 1 answer
2. 590 views
an ideal gas in a closed inflexible container has a pressure of 6 atms and a temperature of 27 degree c. What will be the new
1. 3 answers
2. 493 views
h2+I2 <-------> is independent of ?1) temperature 2) concentration 3) catalyst 4) pressure 5) reactants
1. 0 answers
2. 310 views
nitrobenzene + hono2 on dilution with h2so4 gives ?
1. 0 answers
2. 826 views
a reaction which is endothermic in one direction is1) endothermic in reverse direction 2) exothermic in reverse direction
1. 1 answer
2. 325 views
when the wavelength of a photon of light is reduced its momentum is1) increased 2) decreased 3) not changed
1. 1 answer
2. 325 views
when the wavelength of a photon of light is reduced its momentum is1) increased 2) decreased 3) not changed
1. 1 answer
2. 332 views
bond angle and hybridisation of oxygen in water is ?
1. 1 answer
2. 398 views
which of the following correctly compare the rate of diffusion of oxygen to that of hydrogen1) 1:4 2) 4:1 3) 16:1
1. 1 answer
2. 418 views
in which location, would the boiling piont of water will be highest ?A) new mexico where pressure is 710torr B) new york city
1. 1 answer
2. 650 views
a compound used to manufacture mustard gas is ?
1. 1 answer
2. 352 views
statement that is wrong about transition elements is1) they have fixed oxidation states 2) they show paramagnetic behavior 3)
1. 3 answers
2. 462 views
an example of a transition element having completely filled d-orbital iszn Ti v Cr
1. 1 answer
2. 371 views
how to calculate neutrons in 99Tc43
1. 1 answer
2. 569 views
if k>>1 ? Choose the correct answer1) the equilibrium mix. Will favour product over reactants 2) the equilibrium mix. Will
1. 1 answer
2. 492 views
four grams of he are in a sealed, 2l container. If he were a true ideal gas, how would its behaviour differ from its actual
1. 1 answer
2. 445 views
four grams of he are in a sealed, 2l container. If he were a true ideal gas, how would its behaviour differ from its actual
1. 1 answer
2. 551 views