Q.1
When K2O is added to water, the solution is basic because it contains a significant concentration of ...[ AIIMS 2001]
  • a) O22-
  • b) O3-
  • c) OH-
  • d) K+
Q.2
The reactivity of the alkali metals sodium with water is made use of ? ..[M PMT 1994]
  • a)In drying of alcohol
  • b) In drying of ammonia solution
  • c)In drying of Benzene
  • d)As general drying agent
Q.3
Which of the following statement is incorrect: [ AMU 1997]
  • a) Aluminum is the most abundant metal in earth's crust
  • b) Sodium is the most abundant metallic element in sea water
  • c)Melting and boiling points of alkai metals decreases down the group
  • d)Ionic character of alkali metal halides decreases down the group
Q.4
When CO is passed over solid NaOH heat to 200°C , it forms ..[CBSE PMT 1998]
  • a) Na2CO3
  • b) H2CO3
  • c)HCOONa
  • d)All
Q.5
Which of the following has the highest conductivity? [ Haryana CEET 1999]
  • a) Li+
  • b) Cs+
  • c) Na+
  • d) K+
Q.6
A combustible gas is liberated when caustic soda solution is heated with ..[Raj. PMT 1994]
  • a)S
  • b) NH4Cl
  • c)I2
  • d)Zn
Q.7
Sodium nitrate decomposes above 800°C to give ..[IIT 1998]
  • a) N2
  • b) O2
  • c)NO2
  • d)Na2O
Q.8
On heating sodium metal in a current of dry ammonia, the compound formed is ...[KCET 2000]
  • a) Sodium amide
  • b) Sodium azide
  • c)Sodium nitride
  • d)Sodium hydride
Q.9
On dissolving moderate amount of sodium metal in liquid NH3 at low temperature, which of the following does not occur? .. [AIIMS 2003]
  • a) Blue coloured solution is obtained
  • b) Na+ ions are formed in the solution
  • c) Liquid NH3 solution becomes good conductor of electricity
  • d) Liquid NH3 solution remains diamagnetic
Q.10
Which of the following properties is not true for an alkali metal? [CPMT 1993]
  • a)Low atomic volume
  • b) Low ionization energy
  • c)Low density
  • d)Low electronegativity
Q.11
Which of the following reacts with water at high rate? [ AFMC 1995]
  • a) Li
  • b) K
  • c)Na
  • d)Rb
Q.12
The electronic configuration of metal M is 1s2, 2s2, 2p6, 3sThe formula of its oxide would be ... [MP PMT 1998]
  • a) MO
  • b) M2O
  • c)M2O3
  • d)MO2
Q.13
The alkali metal that reacts with nitrogen directly to form nitride is .. [ MP PMT 2000]
  • a) Li
  • b) Na
  • c) K
  • d) Kb
Q.14
Which of the following is known as fusion mixture? [ CBSE PMT 1993]
  • a)Mixture of Na2CO3 + NaHCO3
  • b) Na2CO3 . 10H2O
  • c)Mixture of K2CO3 + Na2CO3
  • d)NaHCO3
Q.15
Sodium is made by the electrolysis of molten mixture of about 40% NaCl and 60% CaCl2 because...[CBSE PMT 1995]
  • a) CaCl2 helps in conduction of electricity
  • b) This mixture has a lower melting point than NaCl
  • c)Ca2+ can displace Na from NaCl
  • d)Ca2+ can reduce NaCl to Na
Q.16
The stability of the following alkali metal chlorides follows the order .. [MP PMT 1998]
  • a) LiCl > KCl > NaCl > CsCl
  • b) CsCl > KCl > NaCl > LiCl
  • c)NaCl > KCl > LiCl > CsCl
  • d)KCl > CsCl > NaCl > LiCl
Q.17
When sodium is treated with sufficient oxygen/air the product obtain is ...[AFMC 2002]
  • a) Na2O
  • b) Na2O2
  • c) NaO2
  • d) NaO
0 h : 0 m : 1 s