Online Exam On Eamcet,chemistry,p Block Elements

Which of the following has S---S bond ?

H2S2O6

H2S2O7

H2S2O8

Mustard gas

Bond energy of Cl2,Br2 and I2 follow the order

Cl2 > Br2> I2

Br2> Cl2> I2

I2> Br2> Cl2

I2> Cl2> Br2

Ordinary glass is a combination of the following

SiO2,Na2SiO3,CaSiO3

SiO2,Na2CO3,CaCO3

Na2CO3,K2CO3,SiO2

SiO2,PbCO3,CaSiO3

Calorific value of producer gas is low because of

high percent of N2

low percent of CO2

high percent of CO

low percent of N2

The molecular formula of potash alum is :

KAI2S4H48O40

K2AI2S4H48O39

K2AI2S4H48O40

KAI2S4H48O40

Which of the following is not correct

Iodine oxidises sodium thiosulphate to sodium tetrathionate

Sodium thiousulphate is soluble in water

Ozone is used to identify the presence of unsaturation in alkenes

Sodium thiosulphate reacts with iodine to form sodium sulphate

Carbogen to

pure form of carbon

COCl2

mixture of CO and CO2

mixture of O2 and CO2

Observe the following statements :I. Bleaching powder is used in the preparation of chloroform.II. Bleaching powder decomposes in the presence ofCoCl2 to liberate 02.III.Aqueous KHF2 is used in the preparation of fluorine.The correct combination is :

I , II and II are correct

Only II is correct

Only I and III are correct

Only I and II are correct

Bauxite is a mineral for the extraction of :

Which of the following is used for making optical instruments ?

SiO2

SiH4

SiC

Observe the following statements regarding purification of bauxiteI. During Hall's process, silica is removed as Si (vapour)II. Bauxite ore contaminated with Fe2O3 is purified in Baeyer's processIII. During Serpeck's process, AlN is formedThe correct answer is

I, II and III are correct

Only I and II are correct

Only I and III are correct

Only II and III are correct

CFCl3 is responsible for the decomposition of ozone to oxygen. Which of the following reacts with ozone to form oxygen ?

Cl2

Cl-

F-

Cl+

Two oxides of nitrogen,NO and NO2 react together at 2530K and form a compound of nitrogen X.X reacts with water to yield another compound of nitrogen Y.The shape of the anion of Y molecule is

tetrahedral

triangular planar

square planar

pyramidal

Which of the following is the anhydride of HNO3

N2O3

N2O4

N2O5

The number of sigma and pi bonds in peroxodisulphuric acid are, respectively

9 and 4

11 and 4

4 and 8

4 and 9

Which one of the following compounds in aqueous solution gives a white precipitate with perichloric acid ?

NaCl

KCl

MgCl2

FeCl3

In Fischer-Ringe's method of separation of nobles gas mixture, from air is used

90% CaC2 + 10% CaCl2

Coconut charcoal

Soda lime + potash solution

90% CaCO3 + 10% urea

Which one of the following pairs of reactants does not form oxygen when theyreact with each other

F2, NaOH solution (hot, conc.)

F2, H20

Cl2, NaOH solution (cold, dilute)

CaOCl2, H2S04 (dilute, small amount)

The number of oxygen atoms bonded to one phosphorus atom in P4O6 is:

The type of bonds present in sulphuric anhydride

3 σ and three pπ -dπ

3 σ, one pπ - pπ and two pπ - dπ

2 σ and three pπ-dπ

2 σ and two pπ-dπ

Which of the following is not correct

Ammonia is used as refrigerant

A mixture of Ca(CN)2 and C is known as nitrolim

A mixture of Ca(H2PO4)2 and CaSO4.2H2O is known as superphosphate of lime

Hydrolysis of NCI3 gives NH3 and HOCl

Which of the following is not correct

SiO2 is used as acid flux

The distance between the layers in graphite is 3.35 x 10-3 cm

SiO2 reacts with Na2CO3 and liberates CO.

The hybridization of C in graphite is sp2

Which of the following is not a peroxy acid

Perphosphoric acid

Pernitric acid

Perdisulphuric acid

Perchloric

While phosphorus form PCl5, nitrogen does not form NCl5 because

Nitrogen is more electro negative than phosphorus

Nitrogen atom is smaller than phosphorus

The ionisation energy of nitrogen is greater than that of phosphorus

Unlike phosphorous, nitrogens has no d-orbital in its valence shell

The following are some statements related to VA group hydrides,I . Reducing property increases from NH3 to BiH3.II..Tendency to donate lone pair decreases from NH3 to BiH3III.Thermal stability of hydrides decreases from NH3 to BiH3.IV. Bond angle of hydrides decreases from NH3 to BiH3.The correct statements are

I, II, III and IV

I, III and IV

I, II and IV

I and IV

The correct order of reducing abilities of hydrides of V group elements is

NH3 < PH3 < AsH3 < SbH3 < BiH3

NH3 > PH3>AsH3 > SbH3 > BiH3

NH3 < PH3>AsH3 > SbH3 > BiH3

SbH3 > BiH3 > AsH3 > NH3 > PH3

Hydrolysis of NCI3 gives NH3 and X. Which of the following is X ?

HClO4

HClO3

HOCl

HClO2

Which pair of oxyacids of phosphorous contain ‘P - H' bonds

H3PO4, H3PO3

H3PO5, H4P2O7

H3PO3, H3PO2

H3PO2 , HPO3

Fluorine reacts with dilute NaOH and forms a gaseous product A. The bond angle in the molecule of A is

1040 40'

1030

1070

1090 28'

Aluminium reacts with NaOH and forms compound X. If the coordination number of aluminium in X is 6, the correct formula of X

[Al(H2O)4(OH)2]+

[Al(H2O)3(OH)3]

[Al(H2O)2(OH)4]-

[Al(H2O)6](OH)3

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A to Z Exams

Eamcet - Chemistry - P Block Elements 13 And 14 Groups Test

Test Instructions :

1. The Test is 1hr duration.

2. The Test Paper consists of 30 questions. The maximum marks are 30.

3. All the questions are multiple choice question type with three options for each question.

4. Out of the three options given for each question, only one option is the correct answer.

5. Each question is allotted 1 mark for each correct response.

6. 0.25 will be deducted for incorrect response of each question.

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