Incorrect statement among the following is:
1. | Among halide ions, iodide is the most powerful reducing agent. |
2. | Fluorine is the only halogen that does not show a variable oxidation state. |
3. | HOCl is a stronger acid than HOBr |
4. | HF is a stronger acid than HCl |
In X- H ----- Y, X, and Y both are electronegative elements. The correct statement among the following is:
1. | Electron density on X will increase and on H will decrease. |
2. | In both electron density will increase. |
3. | In both electron density will decrease. |
4. | On X electron density will decrease and on H increases. |
Nitrogen form , but phosphorous form , it's at a time convert in , reason is:
1. Triple bond present between phosphorous atoms.
2. bonding is weak in phosphorous.
3. bonding is strong in phosphorous.
4. Multiple bonds easily form phosphorous.
The correct statement among the following is:
1. | Silicon exhibits 8 coordination numbers in its compound. |
2. | The bond energy of F2 is less than Cl2. |
3. | Mn(III) oxidation state is more stable than Mn (II) in an aqueous state. |
4. | Elements of 15th gp show only + 3 and + 5 oxidation states. |
I: | Acid strength increases in the order given as HF < HCl < HBr < HI. |
II: | As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCI, HBr, and HI decreases and so the acid strength increases. |
1. | I is correct but II is False. |
2. | I is incorrect but II is True. |
3. | Both I and II are True. |
4. | Both I and II are False. |
Choose the incorrect statement among the following regarding noble gases:
1. | Noble gases have weak dispersion forces. |
2. | Noble gases have large positive values of electron gain enthalpy. |
3. | Noble gases are sparingly soluble in water. |
4. | Noble gases have very high melting and boiling points. |
In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?
1. | NH3 < PH3 < AsH3 < SbH3 | Increasing acidic character |
2. | CO2 < SiO2 < SnO2 < PbO2 | Increasing oxidizing power |
3. | HF < HCl < HBr < HI | Increasing acidic strength |
4. | H2O < H2S < H2Se < H2Te | Increasing pKa values |
General behavior of is:
1. To give electrons
2. To Give
3. Reaction with
4. To accept electrons
A compound having two direct bonds between P and H atoms is:
1.
2.
3.
4.
Oxidation number of P in pyrophosphoric acid is:
1. +5
2. +2
3. +3
4. +4