Ionic hydrides react with water to give:
1. Acidic solutions.
2. Basic solutions.
3. Hydride ion.
4. Protons.
A neutral hydride among the following is -
1. H2S
2. H2O
3. H2Se
4. H2Te
Which is used to determine hardness of water volumetrically ?
1. H2C2O4
2. Na2S2O3
3.Sod. citrate
4. Di sodium salt of EDTA
The ratio of electron, proton and neutron in tritium is:
1. 1:1:1
2. 1:1:2
3. 2:1:1
4. 1:2:1
Both temporary and permanent hardness are removed on boiling water with:
1. Ca(OH)2
2. Na2CO3
3. CaCO3
4. CaO
When H2O2 is added to acidic ferrous sulphate solution:
1. electrons are gained by Fe2+
2. electrons are lost by Fe2+
3. there is no loss or gain of electrons
4. iron hydroxide precipitates
Which of the following pairs will not produce dihydrogen gas ?
1. Cu + HCl (dil.)
2. Fe + H2SO4
3. Mg + steam
4. Na + alcohol
When zeolites (hydrated sodium aluminum silicate) is treated with hard water, the sodium ions are exchanged with:
1. H+ ion
2. Ca2+ ion
3. ion
4. OH- ion
The formation of atomic hydrogen from molecular hydrogen will be favoured most at ?
1. High temperature and high pressure
2. Low temperature and low pressure
3. High temperature and low pressure
4. Low temperature and high pressure
The bleaching properties of H2O2 are due to its:
1. Reducing properties
2. Oxidising properties
3. Unstable nature
4. Acidic nature