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Variable oxidation state is NOT observed for

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Important Questions on Elements of Groups 16, 17 and 18

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Which among the following is the strongest acid ?

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

The copper

(II)

halide which does not exist is:

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Arrange the hydra-acids of halogens in increasing order of acidity.

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Among the following reactions of hydrogen with halogens, the one that requires a catalyst is:

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Which one of the following reactions does not come under hydrolysis type reaction?

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

{Fex}_{2}

and

{Fey}_{3}

are known when

x

and

y

are :

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Which of the following statements is not true for the reaction,

2 F_{2} + 2 H_{2} O \to 4 HF + O_{2}

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

During the process of preparation of

{CHCl}_{3},

which among the following statements are true?
(i) Bleaching powder on reaction with

H_{2} O

gives

{Cl}_{2} .

(ii)

{Cl}_{2}

reacts with ethanol and produces acetic acid.
(iii) Chloral is formed from the reaction of excess

{Cl}_{2}

with acetaldehyde.
(iv)

Ca (OH)_{2}

cannot hydrolyze chloral to give

{CHCl}_{3}

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Oxidising power increases from left to right in the order.

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Chlorine on reaction with excess of ammonia gives nitrogen gas along with a compound

X

X

reacts with

Ca (OH)_{2}

and gives

Y

, a colourless gas with pungent smell.

Y

on reaction with excess of chlorine gives

Z

and

HCl

. What is

Z

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Among the following, which species represents a pseudohalide ?

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

The non-metal that does not exhibit positive oxidation state is:

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

{IF}_{7}

is known to exist while

{BrF}_{7}

does not exist. The reason is

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

The photographic industry relies on the special light sensitive properties of

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Statement I: Acid strength increases in the order given as

$HF < < HCl < < HBr < < HI$

Statement II:
As the size of the elements $F, Cl, Br, I$ increases down the group, the bond strength of $HF, HCl$ $HBr$ and HI decreases and so the acid strength increases.

In the light of the above statements, choose the correct answer from the options given below.

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Sulphur dioxide reacts with chlorine in the presence of charcoal to give

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

The oxide formed by iodine which is used for the estimation of carbon monoxide is ________

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

At room temperature, the reaction between water and fluorine produces:

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Which of the following statement is correct?

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Chemical Properties of Group 17 Elements

Chlorine water on standing loses its color and forms:

Variable oxidation state is NOT observed for

Important Questions on Elements of Groups 16, 17 and 18

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