A firework gives out green colour light. It contains a slat of ..[ AFMC 1989]
25%
a) Na
19%
b) K
56%
c) Ba
0%
d) Ca
Q.3.
Which of the following are arranged in increasing order of solubility?
12%
a)CaCO3 < KHCO3 < NaHCO3
35%
b) NaHCO3 < KHCO3 < CaCO3
24%
c)KHCO3 < NaHCO3 < CaCO3
29%
d)CaCO3 < NaHCO3 < KHCO3
Q.4.
Which of the following does not liberate O2 in Bunsen burner ..[AFMC 1988]
53%
a) MgO
41%
b) NaNO3
6%
c)Pb3O4
0%
d)KClO3
Q.5.
Which of the following is different from the other three oxides? [ AFMC 1989]
25%
a) MgO
19%
b) SnO
12%
c)ZnO
44%
d)Cr2O3
Q.6.
Mixture of MgCl2 and MgO is called [ DPMT 1982]
31%
a) Portland cement
38%
b) Sorrel's cement
25%
c) Double salt
6%
d) None
Q.7.
Setting of Plaster of Paris involves [ MP PMT 1985]
0%
a)Oxidation with atmospheric oxygen
27%
b) Combination with atmospheric CO2
47%
c)Hydration to yield another hydrate
27%
d)Dehydration
Q.8.
Out of the following elements which one do you expect to be most reactive chemically [ CPMT 1983]
50%
a) Be
19%
b) Ca
25%
c)Ba
6%
d)Sr
Q.9.
Which of the following are arranged in increasing order of solubility? [ AFMC 1987]
0%
a) CaCO3 < KHCO3 < NaHCO3
17%
b) NaHCO3 < KHCO3 < CaCO3
8%
c)KHCO3 < NaHCO3 < CaCO3
75%
d)CaCO3 < NaHCO3 < KHCO3
Q.10.
Which of the following sulphates has highest solubility in water? [ AFMC 1990]
33%
a) BaSO4
0%
b) CaSO4
47%
c) BeSO4
20%
d) MgSO4
Q.11.
Setting of cement is an ..[DPMT 1984]
60%
a)Exothermic reaction
20%
b) Endothermic reaction
13%
c)Neither exothermic nor endothermic
7%
d)None
Q.12.
Oxone is ...[Manipal PMT 2001]
24%
a) CaO
18%
b) N2O
41%
c) Na2O2
18%
d) NaBO3
Q.13.
The alkaline earth metals Ba, Sr, Ca, and Mg may be arranged in the order of their decreasing first ionization potential as .. [ CPMT 1990]
50%
a)Mg, Ca, Sr, Ba
0%
b) Ca, Sr, Ba,Mg
21%
c)Sr, Ba, Mg, Ca
29%
d)Ba, Mg, Ca, Sr
Q.14.
the right order of the solubility of sulphates of alkaline earth metals in water is .. [ MPCEE 1993]
15%
a) Be > Ca > Mg > Ba > Sr
23%
b) Mg > Be > Ba > Ca > Sr
46%
c)Be > Mg > Ca > Sr > Ba
15%
d)Mg > Ca > Ba > Be > Sr
Q.15.
A drying agent which absorbs carbon dioxide and reacts violently with water is .. [ BHU 1994]
15%
a)Sodium carbonate
15%
b) Alcohol
23%
c)Conc. sulphuric acid
46%
d)Calcium oxide
Q.16.
Which of the alkaline earth metals is the strongest reducing agent? [ MP PMT 1995]
9%
a) Ca
9%
b) Sr
45%
c) Ba
36%
d) Mg
Q.17.
Which of the following is true for magnesium? [ Pb CET 1990]
33%
a)It is more electronegative than sodium
8%
b) It is manufactured by electrolysis of aqueous magnesium chloride
42%
c)It is strong reducing agent
17%
d)It resembles, in chemical properties, with its diagonally placed element Boron in III group of the Periodic table
Q.18.
An atom with atomic number 20 is more likely to combine chemically with the atom whose atomic number is ..[CBSE PMT 1993]
7%
a) 11
7%
b) 14
64%
c)16
21%
d)10
Q.19.
Which of the following metal ion plays important role in muscle contraction? [ CBSE PMT 1994]
17%
a)K+
8%
b) Na+
17%
c)Mg2+
58%
d)Ca2+
Q.20.
Identify the correct statement? [ CBSE PMT 1995]
40%
a) Gypsum contains a lower percentage of calcium than plaster of Paris
20%
b) Gypsum is obtained by heating plaster of Paris
20%
c) Plaster of Paris can be obtained by hydration of gypsum
20%
d) Plaster of Paris is obtain by partial oxidation of gypsum
Q.21.
Which of the following has correct increasing basic strength? [ CPMT 1992]
14%
a)MgO < BeO < CaO < BaO
57%
b) BeO < MgO < CaO < BaO
29%
c)BaO < CaO < MgO < BeO
0%
d)CaO < BaO < BeO < MgO
Q.22.
Melting point is lower for .. [ AFMC 1994]
38%
a) Be
23%
b) Mg
23%
c)Ca
15%
d)Sr
Q.23.
Which of the following statement is false? ..[CBSE PMT 1994]
20%
a) Strontium decomposes water readily than beryllium
30%
b) Barium carbonate melts at higher temperature than calcium carbonate
40%
c)Barium hydroxide is more soluble in water than magnesium hydroxide
10%
d)Beryllium hydroxide is more basic than barium hydroxide
Q.24.
A metal is burnt in air and the ash on moistening smells of NHthe metal is ..[KCET 1996]
20%
a) Na
10%
b) Fe
60%
c) Mg
10%
d) Al
Q.25.
Which of the following compound of cement sets at the slowest rate? [ CPMT 1992]
27%
a)Dicalcium silicate
27%
b) Tricalcium silicate
36%
c)Tricalcium aluminate
9%
d)Tetracalcium aluminoferrite
Q.26.
All the following substances reacts with water. the pair that gives the same gaseous product is .. [ CBSE PMT 1994]
0%
a) K and KO2
9%
b) Na and Na2O2
91%
c)Ca and CaH2
0%
d)Ba and BaO2
Q.27.
Which of the following metal evolves hydrogen on reacting with cold dilute HNO3? [ Pb CET 1995]
82%
a) Mg
0%
b) Al
9%
c)Fe
9%
d)Cu
Q.28.
The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct orderK2CO3(I), MgCO3(II), CaCO3(III), BeCO3(IV)
9%
a) I < II < III < IV
73%
b) IV < II < III < I
9%
c) IV < II < I < III
9%
d) II < IV < III < I
Q.29.
Which of the following has highest electrode potential? [ CPMT 1990]
33%
a)Be
17%
b) Mg
0%
c)Ca
50%
d)Ba
Q.30.
The most electropositive amongst the alkaline earth metal is ..[MP PMT 1993]
18%
a) Beryllium
9%
b) Magnesium
18%
c)Calcium
55%
d)Barium
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