1).One of these is a property of fullerenes
(A)Stable to light
(B)Absence of double bond
(C)Full carbon structure
(D)Stable in the dark

Ans: Stable in the dark

2).The main use of elemental nitrogen is to create an inert atmosphere in iron and ___ industry
(A)Lead
(B)Tin
(C)Steel
(D)Bronze

Ans: Steel

3).Which ion is formed when nitri oxide loses unpaired electron
(A)Nitroxonium ion
(B)Nitrite ion
(C)Nitrate ion
(D)Nitride ion

Ans: Nitroxonium ion

4).The most important oxoacid of Nitrogen is
(A)Nitrt acid
(B)Nitrating acid
(C)Nitrous acid
(D)Nitric acid

Ans: Nitric acid

5).Oxides of phosphorus are usually in ____ state below
(A)gaseous
(B)Solid
(C)Liquid
(D)all of the above

Ans: Solid

6).Fullerenes is useful in one of the following except
(A)Organic chemistry
(B)Electrochemistry
(C)Semiconductor technology
(D)Inorganic chemistry

Ans: Inorganic chemistry

7).The following halides of Nitrogen are unstable and explosive except
(A)NF3
(B)NCl3
(C)NBr3
(D)NI3

Ans: NF3

8).How many number of oxidation state does nitrogen exhibit
(A)5
(B)6
(C)7
(D)9

Ans: 9

9).The following are important ingredients of fertilizers except
(A)Orthophosphoric acid
(B)Metaphosphoric acid
(C)Paraphoric acid
(D)Pyrophosphoric acid

Ans: Paraphoric acid

10).One of these is a property of fullerenes
(A)Stable to light
(B)Absence of double bond
(C)Full carbon structure
(D)Stable in the dark

Ans: Stable in the dark