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31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14)


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20 Questions MCQ Test Chemistry Class 11 | 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14)

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) for NEET 2022 is part of Chemistry Class 11 preparation. The 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) questions and answers have been prepared according to the NEET exam syllabus.The 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) MCQs are made for NEET 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) below.
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31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 1

An example of a double salt is 

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 1

Potash Alum, K2SO4. Al2(SO4). 24H2O is a double salt.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 2

The substance used as a smoke screen in warfare is[1989]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 2

SiCl4 gets hydrolysed in moist air and gives white fumes which are used as a smoke screen in warfare.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 3

Glass is a [1991]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 3

Glass is a super cooled liquid.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 4

Which of the following types of forces bind together the carbon atoms in diamond ? [1992]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 4

In diamond each carbon atom is sp 3 hybridized and thus forms covalent bonds with four other carbon atoms lying at the corners of a regular tetrahedron.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 5

Water gas is produced by [1992]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 5

Water gas is made by blowing steam through the layer of  incandescent coal.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 6

Which of the following elements is extracted commercially by the electrolysis of an aqueous solution of its compound ? [1993]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 6

Chlorine is prepared commercially by the electrolysis of an aqueous solution of sodium chloride. It is mainly used as a bleaching agent, bacteriocide and an industrial chemical.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 7

Which of the following statements about H3BO3 is not correct ? [1994]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 7

H3BO3 is a weak monobasic acid.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 8

In graphite, electrons are [1994]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 8

In graphite, each carbon is sp2 -hybridized and the single occupied unhybridized porbitals of C-atoms overlap side wise to give π -electron cloud which is delocalized and thus the electrons are spread out between the structure.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 9

Glass reacts with HF to produce [2000]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 9

The correct answer is option B
Common glass consists of silica (SiO2​). When HF reacts with silica it will form H2​SiF6​ or SiF4​. Both can soluble in water which means that a fresh surface of SiO2​ will be exposed to attack by HF.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 10

In borax bead test which compound is formed?

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 10

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 11

Which one of the following statements about the zeolites is false ? [2004]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 11

Zeolites are aluminosilicates having three dimensional open structure in which four or six membered rings predominates. Thus, due to open chain structure, they have cavities and can take up water and other small molecules.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 12

Al2O3 can be converted to anhydrous AlCl3 by heating [2006]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 12

Al2O3 can be converted to anhydrous AlCl3 by heating a mixture of Al2O3 and carbon in dry Cl2

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 13

The straight chain polymer is formed by:[2009]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 13

Hydrolysis of substituted chlorosilanes yield corresponding silanols which undergo polymerisation.

                    

Polymerisation of dialkyl silandiol yields linear thermoplastic polymer.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 14

The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 14

A molecule is said to be a lewis acid if it can accept a lone pair.

When the halide is more electronegative the interelectronic repulsion increases making the molecule difficult to accept a lone pair.

 Size of halide also behaves in the same way. Also the degree of hydrolysis increases from fluorine to iodine,so the lewis acidic character increases in the same order.

So,the order of lewis acidity is BBr3​ > BCl3​ > BF3​.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 15

Name the type of the structure of silicate in which one oxygen atom of [SiO4]4– is shared ? [2011]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 15

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 16

Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of : [2012]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 16

Fused alumina (Al2O3) is a bad conductor of electricity. Therefore, cryolite (Na3AlF6) and fluorspar (CaF2) are added to purified alumina which not only make alumina a good conductor of electricity but also reduce the melting point of the mixture to around 1140 K.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 17

Which of the following structure is similar to graphite? [NEET 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 17

Boron nitride (BN) is known as inorganic graphite. The most stable form is hexagonal one. It has layered structure similar to graphite.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 18

Which of these is not a monomer for a high molecular mass silicone polymer? [NEET 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 18

Since Me3SiCl contains only one Cl, therefore it can’t form high molecular mass silicon polymer. It can form only dimer.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 19

The basic structural unit of silicates is : [NEET 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 19

SiO44– is basic structural unit of silicates.

31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 20

Which statement is wrong?  [NEET Kar. 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: The p-Block Elements (Group 13 & 14) - Question 20

Feldspars are 3-dimensional aluminosilicates.

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