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
In replacement reaction
The reaction will be most favorable if M happens to be:
1. K
2. Rb
3. Li
4. Na
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) |
The correct order of the mobility of the alkali metal ions in aqueous solution is:
1.
2.
3.
4.
The correct order of increasing thermal stability of K2CO3, MgCO3, CaCO3, and BeCO3 is:
1.
2.
3.
4.
1. CsH > RbH > KH > NaH > LiH
2. KH > NaH > LiH > CsH > RbH
3. NaH > LiH > KH > RbH > CsH
4. LiH > NaH > KH > RbH > CsH
In the case of alkali metals, the covalent character decreases in the order:
1. MCl>Ml>MBr>MF
2. MF>MCl>MBr>Ml
3. MF>MCl>Ml>MBr
4. Ml>MBr>MCl>MF