Acidified solution of chromic acid on treatement with H2O2 yields :

(a) CrO3 + H2O + O2

(b) Cr2O2 + H2O + O2

(c) CrO5 + H2O + K2SO4

(d) H2Cr2O7 + H2O + O2

Subtopic:  H2O2 (Hydrogen Peroxide) |
 54%
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The ortho and para hydrogen possess:

(a) same physical properties but different chemical properties

(b) different physical properties but same chemical properties

(c) same chemical and physical properties

(d) different physical and chemical properties

Subtopic:  Hydrogen- Types & Isotopes |
 62%
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On bubbling CO2 through a solution of barium peroxide in water:

(1) O2 is formed

(2) H2CO3 is formed

(3) H2O2 is formed

(4) H2 is formed

Subtopic:  H2O2 (Hydrogen Peroxide) |
 76%
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A mixture of hydrazine and 60 to 90 percent of H2O2 solution is:

(a) antiseptic

(b) rocket fuel

(c) germicide

(d) insecticide

Subtopic:  H2O2 (Hydrogen Peroxide) |
 60%
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A given solution of H2O2 is 30 volume. Its concentration in terms of molarity is:

(a) 9.1 M

(b) 2.68 M

(c) 2.5 M

(d) 26.8 M

Subtopic:  H2O2 (Hydrogen Peroxide) |
 70%
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Decomposition of H2O2 is accelerated by:

(a) traces of acids

(b) finely divided metals

(c) acetanilide

(d) alcohol

Subtopic:  H2O2 (Hydrogen Peroxide) |
 70%
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Which method cannot be used to remove hardness of water ?

(1) Clark's method

(2) By adding washing soda

(3) Calgon process

(4) Filtration

Subtopic:  Hard & Soft Water |
 86%
From NCERT
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In which reaction hydrogen is not formed ?

(1) Copper and hydrochloric acid

(2) Iron and sulphuric acid

(3) Magnesium and steam

(4) Sodium and alcohol

Subtopic:  Preparation & Properties |
 54%
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Which conversion is not done by H2O2 ?

(1) Fe2+         Fe3+(acidic medium)

(2) PbS         PbSO4

(3) Fe1+         Fe3+ (alkaline medium)

(4) KI         I2

Subtopic:  H2O2 (Hydrogen Peroxide) |
 71%
From NCERT
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H2O2 restores the colour of old lead paintings, blackened by the action of H2S gas, by:

(1) converting PbO2 to Pb

(2) oxidising PbS to PbSO4

(3) converting PbCO3 to Pb

(4) oxidizing PbSO3 to PbSO4

Subtopic:  H2O2 (Hydrogen Peroxide) |
 82%
From NCERT
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