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Chemistry

Question 1 of 21

Medal-premium 1

The alkali metal atom that easily forms the cation is

Select one of the following:

  • Li

  • Rb

  • Cs

  • K

Question 2 of 21

Medal-premium 1

Which of the following alkali metal halides has the lowest lattice energy

Select one of the following:

  • LiF

  • KBr

  • NaCl

  • CsI

Question 3 of 21

Medal-premium 1

The alkali metal widely used in photoelectric cell is

Select one of the following:

  • K

  • Rb

  • Cs

  • Na

Question 4 of 21

Medal-premium 1

The more electropositive metal among the following is

Select one of the following:

  • Ca

  • Na

  • Mg

  • K

Question 5 of 21

Medal-premium 1

The alkali metal needed for the growth of the plants is

Select one of the following:

  • Li

  • K

  • Fe

  • Cs

Question 6 of 21

Medal-premium 1

The formulae of the salts formed when cold and dilute NaOH reacts with chlorine are

Select one of the following:

  • NaCl, NaOCl

  • NaCl, NaClO4

  • NaCl, NaClO3

  • NaClO3, NaClO4

Question 7 of 21

Medal-premium 1

Chile salt peter is the nitrate mineral of

Select one of the following:

  • Potassium

  • Calcium

  • Sodium

  • Lithium

Question 8 of 21

Medal-premium 1

Thermally most stable compound among the following is

Select one of the following:

  • LiOH

  • LiNO3

  • Na2CO3

  • KHCO3

Question 9 of 21

Medal-premium 1

The products obtained when Li burns in air are

Select one of the following:

  • Li2O, Li2O2

  • Li2O only

  • Li2O, Li3N

  • Li3N only

Question 10 of 21

Medal-premium 1

Oxone is a compound of

Select one of the following:

  • Potassium

  • Barium

  • Sodium

  • Lithium

Question 11 of 21

Medal-premium 1

The products obtained on heating LiNO3 will be

Select one of the following:

  • LiNO2 + O2

  • Li3N + O2

  • Li2O + NO2 + O2

  • Li2O + NO + O2

Question 12 of 21

Medal-premium 1

Mg is present in

Select one of the following:

  • Ascorbic acid

  • Chlorophyll

  • Vitamine B12

  • Haemoglobin

Question 13 of 21

Medal-premium 1

Beryllium compounds are largely covalent because,

Select one of the following:

  • Electronegativity of Be is very high

  • Be atom is very large

  • Polarizing power of Be2+ is very high

  • Be is a metal

Question 14 of 21

Medal-premium 1

Mg is related diagonally to

Select one of the following:

  • Be

  • Li

  • Ca

  • Si

Question 15 of 21

Medal-premium 1

The alkaline earth metal that does not lose its metallic lustre when exposed to air is

Select one of the following:

  • Ba

  • Be

  • Mg

  • Ca

Question 16 of 21

Medal-premium 1

A piece of Mg ribbon was heated to redness in nitrogen gas and then dropped into water. The gas evolved is

Select one of the following:

  • NH3

  • O2

  • H2

  • N2

Question 17 of 21

Medal-premium 1

Plaster of Paris hardens by

Select one of the following:

  • Giving CO2

  • Uniting with water

  • Changing into carbonate

  • Giving out water

Question 18 of 21

Medal-premium 1

Mixture of lime stone and clay when heated forms

Select one of the following:

  • Hydraulic mortar

  • Cement mortar

  • Mortar

  • All

Question 19 of 21

Medal-premium 1

A mixture of slaked lime, sand and water is known as

Select one of the following:

  • Port land cement

  • Milk of lime

  • Lime mortar

  • Alabaster

Question 20 of 21

Medal-premium 1

Plaster of Paris in contact with water sets to a hard mass whose composition is

Select one of the following:

  • CaSO4

  • CaSO4. 2H2O

  • CaSO4. H2O

  • BeSO4. Ca(OH)2

Question 21 of 21

Medal-premium 1

21. The wire of flash bulb is made up of

Select one of the following:

  • Cu

  • Ag

  • Mg

  • Ba

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raghu Katagall
Quiz by , created 4 months ago

Quiz on Chemistry, created by raghu Katagall on 11/09/2017.

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raghu Katagall
Created by raghu Katagall 4 months ago
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