For iodine crystals to sublime on heating, the molecules must acquire energy that is?
See more
1993
How many moles of oxygen molecules would be produced from the decomposition of 2.50 moles of potassium trioxochlorate (V)?
See more
1993
A balanced chemical equation obeys the law of?
See more
1993
Which of the following substances is a mixture?
See more
1993
Water has a rather high boiling point despite its low molecular mass because of the presence of?
See more
1993
Which group of elements forms hydrides that are pyramidal in structure?
See more
1993
As the difference in electronegativity between bonded atoms increases, polarity of the bond?
See more
1993
Two atoms represented as U and U are?
See more
1993
An element, E, has the electronic configuration 1s22s22p63s2p3. The reaction of E with a halogen X can give?
See more
1993
A student prepares 0.5 M solution each of hydrochloric and ethanoic acids and then measured pH. The result would show that the?
See more
1993
The phenomenon whereby sodium trioxocarbonate (IV) decahydrate loses some of its water of crystallization on exposure to the atmosphere is known as?
See more
1993
Water can be identified by the use of?
See more
1993
The air around a petroleum refinery is most likely to contain?
See more
1993
Argon is used in gas-filled electric lamp because it helps to?
See more
1993
The oxidation states of chlorine in HOCL, HCLO3 and HCLO4 are respectively?
See more
1993
Which of the reactions occurs at the anode during the electrolysis of a very dilute aqueous solution of sodium chloride?
See more
1993
During the electrolysis of a salt of a metal M, a current of 0.5 A flows from for 32 minutes 10 seconds and deposits 0.325 g of M, What is the charge of the metal ion?(M = 65, If = 96,500 C per mole of electron)
See more
1993
4.0 g of sodium hydroxide in 250 cm3 of solution contains?
See more
1993
NH3 + H3O+→ NH4+ + H2O. It may be deduced from the reaction above that?
See more
1993
Which of these gases can be dried with concentrated H2SO4?