Chemistry Quiz

what is the chemical formula of the compound containing: 6.02 × 10²³ atoms of hydrogen, 35g of chlorine and 4 moles of oxygen?

• HCl4O

• HClO

• HClO4

• HCl2O4

A given mass of gas occupies a certain volume at 300k. at what temperature will its volume be double?

• 400K

• 480K

• 550K

• 600K

sulphur.

• forms to alkaline oxides

• is spontaneously inflammable

• bonds with a blue flame

• conduct electricity in molten State

which of the following is not implicated as a major cause of global warming?

• NO2

• CO2

• CFCl3

• CF2Cl2

which of these reagents can confirm the presence of a triple Bond?

• hypochlorious acid

• bromine water

• acidified KMno4

• copper I chloride

a given volume of maintain diffuses in 20 seconds, how long will it take the same volume of sulfur IV oxide to diffuse under the same conditions?? [C=12, H= 1, S = 32, O = 16].

• 5s

• 20s

• 40s

• 60s

what condition favors the formation of the products for the endothermic reaction, N2O4 ---> 2NO2.

• a decrease in pressure

• a decrease in volume

• an increase in pressure

• a constant volume

which of the following is not a chemical reaction?

• burning of bush

• rusting of iron

• decay of bitter leaves

• the solution of potassium hydroxide pellets

oxygen is extracted from water by?

• displacement reaction

• oxidation reaction

• reduction reaction

• decomposition reaction

which of the following metals cannot displace hydrogen from steam?

• copper

• iron

• strontium

• lithium