Chemistry Question Bank

The formula of exhausted permutit is

Which of the following is a true structure of H2O2 in solid phase ? (a) (b) (c) (d)

When CO2 is bubbled through a solution of barium peroxide in water

Which of the following metals evolves hydrogen on reacting with cold dilute HNO3? (AIPMT 1989)

The ionization of hydrogen atom would give rise to (AIPMT 1990)

Hydrogen peroxide molecules are (AIPMT 1991)

At its melting point, ice is lighter than water because (AIPMT 1992)

Permanent hardness of water can be removed by adding (AFMC 2010)

The degree of hardness of water is usually expressed in terms of (AMU 2010)

Some statements about heavy water are given below. (i) Heavy water is used as moderator in nuclear reactors. (ii) Heavy water is more associated than ordinary water. (iii) Heavy water is more effective solvent than or…

Semi-water gas is a mixture of (UP CPMT 2010) (a) CO H (b) CO N (c) CO H N (d) H CH

Which one of the following statements is incorrect with regard to ortho and para dihydrogen? (Kerala CEE 2009)

Which one of the following is non-reducing? (J&K CET 2009)

Which of the following is incorrect? (BHU 2008)

3.03% w/V The correct match is

1.785 M (D) 100 vol H2O2

5.358 N (C) 30 vol H2O2

Perhydrol (B) 20 vol H2O2

Match the following (CPMT 2008) Column I Column II (A) 10 vol H2O2

If 11.1 mg of CaCl2 and 12 mg of MgSO4 are present in 2 L of water, what is its hardness (in gram CaCO3 / ppm)? (EAMCET 2008)

Which one of the following processes will produce hard water? (RPMT 2008)

Radioactive isotope of hydrogen is (RPMT 2007)

The formula of Calgon, used for water softening is (EAMCET 2007)

Hardness of water is due to the presence of salts of (AMU 2007)

How many ‘mL’ of perhydrol is required to produce sufficient oxygen which can be used to completely convert 2 L of SO2 gas? (BITSAT 2007)