Study of Compounds C. Nitric Acid Assertion Reason Questions for ICSE Chemistry Class 10. This Assertion (A) Reason (R) type Questions is very helpful for this year students.
Question No. 1 and 20 consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, and R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true
Que 1) Assertion: Nitric oxide is found in atmosphere during lightening discharge.
Reason: During lightening discharge nitrogen present in the atmosphere react with the oxygen to form nitric oxide.
Que 2) Assertion: The conservation of free atmospheric nitrogen into useful nitrogenous compound in the soil is known as fixation of nitrogen.
Reason: Fixation of nitrogen is directly useful only for animals.
Que 3) Assertion: Potassium nitrate and conc. Sulphuric acid is used to obtain reactants required for preparing nitric acid.
Reason: Sulphuric acid is non-volatile acid.
Que 4) Assertion: Ostwald process is used to manufacture nitric acid.
Reason: The Ostwald process is used to obtain dilute nitric acid.
Que 5) Assertion: Nitrogen shows valency of 3
Reason: Relative molecular mass of nitric acid is 63.
Que 6) Assertion: Commercial nitic acid is yellow in colour.
Reason: nitric acid shows 1.54 g/cm3 density.
Que 7) Assertion: Boiling point of nitric acid is 860C.
Reason: Melting point of nitric acid is -420C.
Que 8) Assertion: In the process of catalytic oxidation of ammonia there is no required of external heat.
Reason: The mixing of dry air and dry ammonia is exothermic process.
Que 9) Assertion: Nitric acid is non poisonous but is has corrosive action on skin.
Reason: An aqueous solution of nitric acid forms a constant boiling mixture at 1210C.
Que 10) Assertion: To remove yellow colour od nitric acid dry air or CO2 is used.
Reason: The dry air or CO2 gas drives away NO gas from the warm nitric acid.
Que 11) Assertion: Nitric acid turns blue litmus red and phenolphthalein turn pink.
Reason: Nitric acid is very strongly monobasic acid.
Que 12) Assertion: The nitric acid obtained in laboratory is slightly yellow in colour.
Reason: The reddish-browncoloured nitrogen dioxide gas is dissolved in nitric acid.,
Que 13) Assertion: Nitric acid neutralizes alkalis to form salt and water.
Reason: All metallic oxides and hydroxides react with dilute nitric acid to their respective soluble metallic nitrates and water.
Que 14) Assertion: Conc. nitric acid when mixed with conc. HCL gives aqua regia.
Reason: The aqua regia react with noble metals like gold and platinum to give their nitrates.
Que 15) Assertion: Normally nitric acid is stored in coloured bottles.
Reason: When nitric acid stored in transparent bottle, it turns yellow due to dissolved NO2.
Que 16) Assertion: Cold and dilute nitric acid oxidizes metals to their nitrates and create nitric oxide.
Reason: Hot and conc. nitric acidliberates nitrogen dioxide.
Que 17) Assertion: Magnesium and manganese is used to prove that nitric acid contains hydrogen.
Reason: Dilute nitric acid react with Magnesium and manganese to give their nitrates with removal of hydrogen.
Que 18) Assertion: Conc. nitric acid gives brown fumes on heating.
Reason: Nitrates produces greenish fumes of nitrogen dioxide.
Que 19) Assertion: Nitric acid is used to produce explosives like T.N.T.
Reason: Nitric acid is used to produce synthetic fibres like silk, nylon, cellulose, etc.
Que 20) Assertion: Nitric acid is often used to purify the gold.
Reason: Gold contain Cu, Ag, Zn, Pb, etc. as impurities which dissolve in nitric acid.
ANSWERS
1) A 6) B 11) D 16) B
2) C 7) C 12) A 17) A
3)B 8) A 13) B 18) C
4) C 9) B 14) C 19) B
5) D 10) C 15) A 20) A