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
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
B.
II
Among the given statements, statement II is the correct one.
Lithium (Li) is the only alkali metal which reacts directly with N2 to give nitride (Li3N) which is much more stable.
6Li + N2 → 2Li3N
Li + H2 Hydrides
The boiling and melting point of Li are highest among the group 1. These are the anomalous behaviour of Li.
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