P-block elements practice · Medium

Assertion: Both the $\mathrm{S}-\mathrm{O}$ bonds in sulphur dioxide are equal.

Reason: Sulphur dioxide molecule exhibits resonance.

Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?

Which of the following statements are correct?

(i) Arsenic and antimony are metalloids.

(ii) Phosphorus, arsenic and antimony are found mainly as sulphide minerals.

(iii) Covalent redii increases equally from ${N}$ to Bi.

(iv) Elements of group 15 have extra stability and higher ionisation energy due to exactly half filled $n s^2 n p^3$ electronic configuration.

(v) In group 15 elements only nitrogen is gas whereas all others are solids.

Which of the following statements are incorrect for ${XeOF}_4?$
A. It has a square planar structure
B. It has a square pyramidal structure
C. It has pentagonal bipyramidal structure
D. It has 2 lone pair of electrons around Xenon

Which of the following chemical reaction does not represents the oxidising behaviour of $\mathrm{H}_2 \mathrm{SO}_4$ ?

The type of hybridisation and number of lone pairs
of electrons on $Xe$ in $XeO{F_4},$ respectively, are :

Assertion (A): $\mathrm{NH}_3$ is more polar than $\mathrm{NF}_3.$

Reason (R): $\mathrm{NF}_3$ cannot be hydrolysed.

Which of the following pair of molecules does not have identical structure?

In ordinary $C{l_2}$ gas $C{l^{35}}$ and $C{l^{37}}$ are in the ratio:

Assertion : ${HOF}$ bond angle in ${HFO}$ is higher than ${HOCl}$ bond angle in ${HClO}$.

Reason : Oxygen is more electronegative than halogens.

The solution of phosphine in water
decomposes in the presence of light
giving

Which of the following(s) give(s) coloured gases?

Statement-I: Nitrogen is inactive in normal chemical reactions.

Statement-II: The bond dissociation energy is directly proportional to reactivity.

Ozone reacts with dry iodine to give:

In which of the following sets the order of boiling points are incorrect?

Assertion: $\mathrm{H}_2 \mathrm{Se}$ is more acidic than $\mathrm{H}_2 \mathrm{Te}$

Reason: Bond enthalpy decrease with increased in size of the atom.

Statement I: $\mathrm{H}_2 \mathrm{SO}_4$ forms only one series of salts

Statement II: The molecule of $\mathrm{H}_2 \mathrm{SO}_4$ consists of two $\mathrm{OH}$ group

Which one of the following arrangement does not accurately depict the trend mentioned against it?

Oxide of a non-metal possesses the following characteristics: (i) It is both a proton donor and proton acceptor. (ii) It is poor conductor of electricity. (iii) It reacts readily with basic and acidic oxides. (iv) It oxidses Fe at boiling point. The oxide is:

The paramagnetic oxides of nitrogen are

An orange solid $(X)$ on heating gives a colourless gas (y) and only a green residue (z). Gas (y) on treatment with ${Mg}$ produces a white solid substance:-

Which of the following will have the least bond angle?

Assertion (A): Pitch blende, monozite and clevite are not radio active minerals.

Reason (R): Oganesson and Radon are not present in atmosphere.

$\left[ X \right] + {H_2}S{O_4} \to \left[ Y \right]$ a colourless gas with irritating smell. $\left[ Y \right] + {K_2}C{r_2}{O_7} + {H_2}S{O_4} \to$ Green solution [X] and [Y] are:

Which ion cannot be precipitated from water?

In Haber's process for the manufacture of ${NH}_3$ :

Which of the following elements is radioactive?

In which molecule hybrid orbital have only $20 \%$ d- character?

Which of the following is not a monobasic acid?

The number of molecules of water needed to convert one molecule of ${P_2}{O_{5\;}}$ into orthophosphoric acid is: