Match the column:-
Column I | Column II |
A. Heavy water | P. Bicarbonates of Ca & Mg |
B. Temporary hardness | Q. No foreign ions |
C. Soft water | R. D2O |
D. Permanent Hardness | S. Sulphates of Ca & Mg |
A | B | C | D | |
1. | S | P | Q | R |
2. | R | P | Q | S |
3. | P | Q | R | S |
4. | S | R | P | Q |
The freezing point of heavy water in comparison to normal water is -
1. Higher
2. Lower
3. Same
4. None of the above
The hydride formed by an element having valence shell electronic configuration is -
1. Saline hydride.
2. Electron rich hydride.
3. Interstitial hydride.
4. No hydride.
An isotope that is used as a tracer in a chemical reaction is-
1.
2.
3.
4. Ortho hydrogen
A compound that can remove both temporary and permanent hardness of water is -
1.
2. Boiling
3.
4.
The correct match among the following is -
(a) CO(g)+H2(g) | (i) Mg(HCO3)2+Ca(HCO3)2 |
(b) Temporary hardness of water | (ii) An electron deficient hydride |
(c) B2H6 | (iii) Synthesis gas |
(d) H2O2 | (iv) Non-planar structure |
(a) | (b) | (c) | (d) | |
1. | (iii) | (ii) | (i) | (iv) |
2. | (iii) | (iv) | (ii) | (i) |
3. | (i) | (iii) | (ii) | (iv) |
4. | (iii) | (i) | (ii) | (iv) |
A compound among the following that has hydrogen in the atomic state is –
1. Metallic hydrides
2. Ionic hydrides
3. Molecular hydrides
4. Water
Exhausted permutit does not contain –
1. ion
2. ion
3. ion
4. ion
Para hydrogen is-
1. Less stable than ortho hydrogen.
2. More stable than ortho hydrogen.
3. As stable as ortho hydrogen.
4. None of the above.