Among the following which one has the highest cation to anion size ratio?
1. CsF
2. LiF
3. NaF
4. CsI
The compound A on heating gives a colourless gas and a residue that is dissolved in water to obtain B. Excess of CO2 is bubbled through an aqueous solution of B. C is solid. Solid C on gentle heating gives back A. The compound A is:
1. Na2CO3
2. K2CO3
3. CaSO4.2H2O
4. CaCO3
Match List I with List II for the composition of substances and select the correct answer using the code given below:
List-I Substances |
List-II |
(A) Plaster of paris | (i) CaSO4. 2HO |
(B) Epsomite | (ii) CaSO4.½H2O |
(C) Kieserite | (iii) MgSO4.7H2O |
(D) Gypsum | (iv) MgSO4.H2O |
(v) CaSO4 |
Code :
(A) | (B) | (C) | (D) | |
1. | (iv) | (iii) | (ii) | (i) |
2. | (iii) | (iv) | (i) | (ii) |
3. | (ii) | (iii) | (iv) | (i) |
4. | (i) | (ii) | (iii) | (v) |
When a substance A reacts with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner.
The substance A, B, C and D, respectively are:
1. K, , NaOH, Zn
2. Na, NaOH, , Zn
3. Li, , LiOH, Zn
4. None of the above
A solid compound 'X' on heating gives CO2 gas and a residue. The residue mixed with water forms 'Y'. On passing an excess of CO2 through 'Y' in water, a clear solution, 'Z' is obtained. On boiling 'Z', compound 'X' is reformed. The compound 'X' is:
1.
2.
3.
4.
Identify the correct statement from the following:
1. | The correct order of hydration enthalpies of alkaline earth cations is Be2+ < Mg2+ < Ca2+ < Sr2+ < Ba2+ |
2. | Lithium and Magnesium show some similarities in their physical properties as they are diagonally placed in the periodic table. |
3. | Lithium is softer among all alkali metals. |
4. | Lithium chloride is deliquescent and crystallizes as a hydrate, LiCl·6H2O. |
Among the following alkaline earth metal halides, the one which is covalent and soluble in organic solvents is:
1. Magnesium chloride
2. Beryllium chloride
3. Calcium chloride
4. Strontium chloride
The structures of beryllium chloride in solid-state, and vapor state are :
1. Dimer, and Linear, respectively.
2. Chain in both.
3. Chain, and dimer, respectively.
4. Linear in both.
HCl was passed through a solution of CaCl2, MgCl2, and NaCl. Compound(s) that get crystallize is/are-
1. Only NaCl
2. Only MgCl2
3. NaCl, MgCl2, and CaCl2
4. Both MgCl2 and CaCl2
List-I | List-II | ||
(a) | Li | (i) | absorbent for carbon dioxide |
(b) | Na | (ii) | electrochemical cells |
(c) | KOH | (iii) | coolant in fast breeder reactors |
(d) | Cs | (iv) | photoelectric cell |
(a) | (b) | (c) | (d) | |
1. | (ii) | (iii) | (i) | (iv) |
2. | (iv) | (i) | (iii) | (ii) |
3. | (iii) | (iv) | (ii) | (i) |
4. | (i) | (iii) | (iv) | (ii) |