Match the following:
List - I (Magnetic Property) | List - II (Substance) |
A. Ferromagnetic | 1. O2 |
B. Antiferromagentic | 2. CrO2 |
C. Ferrimagnetic | 3. MnO |
D. Paramagnetic |
4. Fe3O4 5. C6H6 |
A - 3; B - 2; C - 4; D - 1
A - 2; B - 3; C - 4; D - 1
A - 1; B - 3; C - 5; D - 4
A - 4; B - 2; C - 3; D - 5
The slope of the graph drawn between ln k and as per Arrhenius equation gives the value (R = gas constant; Ea = Activation energy)
Which one of the following statements is not correct?
O3 is used as a germicide.
In O3 , O - O bond length is identical with that of molecular oxygen.
O3 is an oxidising agent
The shape of O3 molecule is angular.
Which of the following reactions does not take place?
F2 + 2Cl- → 2F- + Cl2
Br2 + 2I- → 2Br- + I2
Cl2 + 2Br- → 2Cl- + Br2
Cl2 + 2F- → 2Cl- + F2
D.
Cl2 + 2F- → 2Cl- + F2
Cl2 cannot displace F2. The relevant stoichiometric relationship is-
Cl2 + 3F2 → 2ClF3
Consider the following statements-
I. Cs+ ion is more highly hydrated than other alkali metal ions.
II. Among the alkali metals, only lithium forms a stable, nitride by direct combination with nitrogen.
III. Among the alkali metals Li, Na, K, Rb the metal, Rb has the highest melting point.
IV. Among the alkali metals Li, Na, K, Rb only Li forms peroxide when heated with oxygen.
Select the correct statement is
I
II
III
IV
Which of the following causes blue baby syndrome?
High concentration of lead in drinking water.
High concentration of sulphates in drinking water.
High concentration of nitrates in drinking water.
High concentration of copper in drinking water.
Which of the following belongs to the homologous series of C5H8O2N?
C6H10O3N
C6H8O2N2
C6H10O2N2
C6H10O2N
In Dumas method, 0.3 g of an organic compound gave 45 mL of nitrogen at STP. The percentage of nitrogen is
16.9
18.7
23.2
29.6
The IUPAC name of the following compound is-
(CH3)2CH-CH=CH-CH=CH(C2H5)-CH3
2, 7-dimethyl-3, 5-nonadiene
2, 7-dimethyl-2-ethylheptadene
2-methyl-7-ethyl-3, 5-octadiene
1, 1-dimethyl-6-ethyl-2, 4-heptadiene