Which of the following statement is false for alkali metals? [ MLNR 1994]
0%
a)Lithium is strongest reducing agent
56%
b) Sodium is amphoteric in nature
22%
c)Li+ is exceptionally small
22%
d)Alkali metals give blue solution in liquid ammonia
Q.2.
Which of the following oxides is formed when potassium metal is burnt in excess air? [ Pb. CET 1990]
29%
a) K2O
0%
b) KO
57%
c)KO2
14%
d)K2O2
Q.3.
Salt used for performing bead test in qualitative inorganic analysis is .. [MLNR 1991]
14%
a) K2SO4. Al2(SO4 .6H2O
57%
b) FeSO4 . (NH4)2SO4 .6H2O
29%
c) Na(NH4)HPO4 .4H2O
0%
d) CuSO4 . 5H2O
Q.4.
Sodium carbonate reacts with SO2 in aqueous medium to give .. [ MP PMT 1985]
33%
a)NaHSO3
33%
b) Na2S2O3
17%
c)NaHSO4
17%
d)Na2SO4
Q.5.
Sodium metal cannot be stored under.. [ CPMT 1988]
0%
a) Benzene
33%
b) Kerosene oil
67%
c)Alcohol
0%
d)Toluene
Q.6.
The properties of lithium are similar to those of Mg. This is because ..[NCERT 1990]
17%
a) Both have nearly same size
50%
b) The ratio of their charge to size is nearly same
33%
c)Both have similar electron configuration
0%
d)Both are found together in nature
Q.7.
The alkali metal that reacts with nitrogen directly to form nitride is ... [Roorkee 1992]
67%
a) Li
0%
b) Na
0%
c) K
33%
d) Rb
Q.8.
Which of the following imparts violet coloration to the non-luminous flame of Bunsen burner? [ CPMT 1985]
17%
a)NaCl
50%
b) BaCl2
0%
c)CaCl2
33%
d)KCl
Q.9.
Which of the following atoms will have the smallest size? [ CBSE PMT 1989]
17%
a) Mg
0%
b) Na
33%
c)Be
50%
d)Li
Q.10.
Potassium metal is commercially prepared by the reduction of molten KCl with metallic sodium at 850°C. This method is based upon the following principle. ..[Pb CET 1990]
29%
a) Sodium is more reactive than potassium at this temperature
57%
b) Potassium being more volatile distills off thus shifting the reaction forward
14%
c)Sodium prefers to bind to chloride ions in preference to potassium ions
0%
d)Potassium and sodium form an alloy at this temperature
Q.11.
Which of the following does not illustrate the anomalous properties of Li? [ MP CET 1993]
0%
a) The m.p. and b.p. of Li are comparatively high
0%
b) Li forms a nitride unlike group 1 metals
0%
c) Li is much softer than the other I group metals
100%
d) Li+ and its compounds are more heavily hydrated than those of the rest of the group
Q.12.
The pair of compounds which cannot exist together in solution is ... [ IIT 1986]
33%
a)NaHCO3 and NaOH
33%
b) NaHCO3 and H2O
33%
c)NaHCO3 and Na2CO3
0%
d)Na2CO3 and NaOH
Q.13.
Which of the following alkali metal hydroxides is the strongest base? [ PbCET 1990]
17%
a) LiOH
33%
b) NaOH
33%
c)KOH
17%
d)CsOH
Q.14.
Microcosmic salt is .. [CPMT 1991]
17%
a) Na2HPO4 . 2H2O
17%
b) (NH4)2HPO4
33%
c)Na(NH4)HPO4 .4H2O
33%
d)None of above
Q.15.
In the preparation of sodium carbonate (Na2CO3) which of the following is used? ..[AFMC 1992]
33%
a) Slaked lime
0%
b) Quick lime
67%
c) Lime stone
0%
d) Sodium hydroxide
Q.16.
Which is manufactured by electrolysis of fused NaCl? ..[CPMT 1983]
33%
a)NaOH
33%
b) Na
0%
c)NaClO
33%
d)NaClO3
Q.17.
When CO2 is bubbled into aqueous solution of Na2CO3 the following is formed [MP PMT 1986]
38%
a) NaOH
25%
b) NaHCO3
25%
c)H2O
12%
d)OH-
Q.18.
Which of the following compounds has the lowest anion to cation size ratio? [ NCERT 1990]
29%
a) LiF
29%
b) NaF
14%
c)CsI
29%
d)CsF
Q.19.
Sodium conducts electricity because .. [Pb CET1991]
29%
a) It is a soft alkali metal
29%
b) It has only one electron in the outermost orbit
29%
c) It has mobile electrons
14%
d) It gives hydrogen with water
Q.20.
Molecular formula of Glauber's salt is .. [ IIT 1985]
33%
a)MgSO4 . 7H2O
0%
b) CuSO4 .5H2O
22%
c)FeSO4 . 7H2O
44%
d)Na2SO4 . 10H2O
Q.21.
Among alkali metal salts, the lithium salts are the poorest conductors of electricity in aqueous solution because of .. [Pb CET 1989]
14%
a) Easy diffusion of Li+ ions
29%
b) Lower ability of Li+ ions to polarize water molecules
29%
c)Lowest charge to radius ratio
29%
d)Higher degree of hydration of Li+ ions
Q.22.
The gas evolved on heating Na2CO3 is ..[CPMT 1990]
33%
a)CO2
17%
b) CO
50%
c)Water gas
0%
d)No gas
Q.23.
The correct sequence of the alkali metals in the group is ... [ AFMC 1992]
0%
a) Fr, Na, K, Rb, Cs, Li
89%
b) Li, Na, K, Rb, Cs, Fr
11%
c) Na, K, Rb, Cs, Fr, Li
0%
d) Rb, Cs, Li, Na, K
Q.24.
Nitrogen can not be prepared by heating .. [ IIT 1985]
17%
a)KNO3
33%
b) Pb(NO3)2
33%
c)Cu(NO3)2
17%
d)AgNO3
Q.25.
The formula of nitre is ... [CPMT 1989]
50%
a) KNO3
33%
b) NaNO2
0%
c)NaCl
17%
d)Na2CO3
Q.26.
NaCl crystal consists of .. [ Vellore PMT 1991]
0%
a) NaCl molecules
17%
b) Na and Cl atoms
83%
c)Na+ and Cl- ions
0%
d)Na- and Cl+ ions
Q.27.
The chloride of an element A gives a neutral solution in water. In the periodic table, the element A belongs to ...[ AIIMS 1992]
57%
a) First group
14%
b) Third group
29%
c) Fifth group
0%
d) First transition series
Q.28.
Which of the following is radioactive? [ BHU 1992]
6%
a)Na 23
25%
b) K39
50%
c)K40
19%
d)Ca40
Q.29.
Compared to alkali earth metals, the alkali metals exhibit... [CBSE PMT 1990]
28%
a) Smaller ionic radii
32%
b) Highest boiling points
24%
c)Greater hardness
16%
d)Lower ionization energies
Q.30.
Which of the following is more basic ..[Vellore PMT 1991]
17%
a) Na2O
0%
b) BaO
50%
c)Al2O3
33%
d)As2O3
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