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Perhydrol (B) 20 vol H2O2
Assertion: Increasing pressure on pure water decreases its freezing point. Reason: Density of water is maximum at 4° C.
Assertion: Among the two OH bonds in H2O molecule, the energy required to break the first OH bond and the other OH bond is same. Reason: This is because the electronic environment around oxygen is the same even after …
Assertion: Permanent hardness of water can be removed by using washing soda. Reason: Washing soda reacts with soluble calcium and magnesium chlorides and sulphates in hard water to form insoluble carbonates.
Assertion: Anhydrous BaO2 (barium peroxide) is used for preparing H2O2. Reason: Hydrated BaO2 is not available.
1.785 M (D) 100 vol H2O2
5.358 N (C) 30 vol H2O2
Which of the following cannot be used as a test for H2O2 ?
H2O2 is obtained by which of the following?
Which of the following is not correct regarding the electrolytic preparation of H2O2?
When zeolite (hydrated sodium aluminium silicate) is treated with hard water the sodium ions are exchanged with
Which of the following reactions is not used in preparation or deuterium compounds using heavy water?
The molecular formula of a commercial resin used for exchanging ions in water softening is C8H7SO3Na (Mol. wt. 206). What would be the maximum uptake of Ca2+ ions by the resin when expressed in mole per gram resin?
Match the column I with column II and mark the appropriate choice. Column I Column II (A) Clark’s method (i) Na6P6O18 (B) Calgon’s method (ii) NaAlSiO4 (C) Ion-exchange method (iii) RSO3H (D) Synthetic resins method (…
Match the column I with column II and mark the appropriate choice. Column I Column II (A) Syngas (i) Na6P6O18 (B) Calgon (ii) NaAlSiO4 (C) Permutit (iii) CO + H2 (D) Producer gas (iv) CO + N2
During hydrate formation from aqueous solution, water can be associated in different forms. Indicate the wrong combination. (i) Coordinated water – [Cr(H2O)6]3+ 3Cl– (ii) Interstitial water – BaCl2.2H2O (iii) Hydrogen…
Study the following reactions and mark the correct properties shown by water. (i) SO3 + H2O → H2SO4 (ii) Cl2O7 + H2O →2HClO4 (iii) CaO + H2O →Ca(OH)2 (iv) Na2O + H2O →2NaOH
Match the reaction of column I with their types given in column II and mark the appropriate choice. Column I Column II (A) H O NH NH OH (i) Self ionisation of H2O (B) FeCl 3H O -> Fe(OH) 3HCl (ii) Decompositio…
Choose the correct statement about the given figures.
Which of the statements given below are true for the water molecule structure? (i) Oxygen undergoes sp3hybridisation. (ii) Due to presence of two lone pairs of electrons on oxygen the H–O–H bonds angle is 118.4°. (ii…
Phosphorus cannot form PH5 with its outer electronic configuration as 3s2, 3p3 because
Match the column I with column II and mark the appropriate choice. Column I Column II (A) NaH (i) Interstitial hydride (B) CH4 (ii) Molecular hydride (C) VH0.56 (iii) Ionic hydride (D) B2H6 (iv) Electron-deficient hyd…
A commercial sample of hydrogen peroxide is labelled as 10 volume. Its percentage strength is nearly
Semi-water gas is a mixture of (UP CPMT 2010) (a) CO H (b) CO N (c) CO H N (d) H CH
The volume of oxygen liberated from 15 mL of 20 volume H2O2 is