Which of the the weight or NO produced must eqt NO is 304% nitrogen, then NOs madeby a When NoOs decomposes into NO, weight of NOs that decomposes b) r NO, made by of nitrogen combining Na and O must have a The su called the d) l reaction results in new matter being made in the lled written on the left side of the arrow in a chemical reaction are reactants, and the substances written on the right side are ca the products e) water since water has a different percentage of oxygen than hydrogen peroxide, water and hydrogen peroxide must have different formulas 2 NaCI(aa)+ HSCa) the resulting solution 7. In the reaction Na S(aq)+2 HCKa) weighs less than the sum of the original solutions because a) some of the products escaped as a gas b) the chloride ion is heavier than the sulfide lon C)the weights of solutions are not additive d) e) some of the iron gets changed to hydrogen this reaction is an exception to the Law of Conservation of Mass Which of the following statements is INCORRECT? a) b) 8. Bromine is a nonmetal Neon is a metallold Metals conduct heat and electricity c) Cerium is a metal d) e) Mercury is a liquid 9 Which of the following would be a chemical change? When limestone is heated, its weight changes a) b) magnesium metal is heated, a bright white flame ap white, nonconductive solid forms When orange ammonium dichromate is heated,a c) whooshing sound is heard d) ) all of the above and a green solid forms When vinegar and baking soda are mixed, bubbles form Solution Ans 6 : b) If NO2 made by decomposing N2O4 is 30.4% nitrogen , then NO2 made by combining N2 and O2 must have a different percentage of nitrogen. This statement is wrong because , no matter whatever be the source of the compound NO2 , the percentage of its elements by mass remain same. This is in accordance with the law of definite proportion. So the above mentioned sentence is incorrect. .

1. Which of the the weight or NO produced must eqt NO is 304% nitrogen, then NOs madeby a
When NoOs decomposes into NO, weight of NOs that decomposes b) r NO, made by of nitrogen
combining Na and O must have a The su called the d) l reaction results in new matter being
made in the lled written on the left side of the arrow in a chemical reaction are reactants, and the
substances written on the right side are ca the products e) water since water has a different
percentage of oxygen than hydrogen peroxide, water and hydrogen peroxide must have different
formulas 2 NaCI(aa)+ HSCa) the resulting solution 7. In the reaction Na S(aq)+2 HCKa) weighs
less than the sum of the original solutions because a) some of the products escaped as a gas b)
the chloride ion is heavier than the sulfide lon C)the weights of solutions are not additive d) e)
some of the iron gets changed to hydrogen this reaction is an exception to the Law of
Conservation of Mass Which of the following statements is INCORRECT? a) b) 8. Bromine is a
nonmetal Neon is a metallold Metals conduct heat and electricity c) Cerium is a metal d) e)
Mercury is a liquid 9 Which of the following would be a chemical change? When limestone is
heated, its weight changes a) b) magnesium metal is heated, a bright white flame ap white,
nonconductive solid forms When orange ammonium dichromate is heated,a c) whooshing sound
is heard d) ) all of the above and a green solid forms When vinegar and baking soda are mixed,
bubbles form
Solution
Ans 6 : b) If NO2 made by decomposing N2O4 is 30.4% nitrogen , then NO2 made by
combining N2 and O2 must have a different percentage of nitrogen.
This statement is wrong because , no matter whatever be the source of the compound NO2 , the
percentage of its elements by mass remain same. This is in accordance with the law of definite
proportion.
So the above mentioned sentence is incorrect.