The earth absorb radiation in Visible range but emit radiation at the same rate in the:
A. Ultra voilet B. Gamma rays C. Infrared D. All of these
Chemistry MCQs
What is the mass of one mole of Iodine?
A. 74g B. 254g C. 127g D. 53g
Atoms of all the elements always contain in nucleus:
A. Proton and neutron B. Neutron and electron C. Proton D. Neutron
Chemistry is given from ……language ?
A. Latin B. Greek C. Arabic D. None of these Chemistry, from the Greek word χημεία (khēmeia) meaning “cast together” or “pour together”, is the science of matter at the atomic to molecular scale, dealing primarily with collections of atoms, such as molecules, crystals, and metals.
A metallic atom loses its valence electron to form a/an _________?
A. an anion B. a cation C. an anion – cation D. none of these
An acid-Base Reaction is always a/an __________?
A. Endothermic B. Exothermic C. Fission D. Fusion
Which of the following statement is correct ?
A. size of Cl atoms > Cl- ion B. size of Na+ ion < Na atom C. size of Na atom < Na+ ion D. Cl- < Na+
Which one of the following statement is correct for urea ?
A. it is a synthetic fertilizer B. it is a natural fertilizer C. it provides micronutrients to the plants D. it is an inorganic water soluble compound
Which statement is incorrect ?
A. All the metals are good conductor of electricity B. All the metals are good conductor of heat C. All the metals form positive ions D. All the metals form acidic oxides
Atom is the smallest particall which is_________?
A. Indivisible B. Divisible C. Both D. Non of these