Free Chemistry QBank for Polytechnic Exams

POLYTECHNIC | Chemistry QBank

Welcome Aspirants !!!

ScholarWorm welcomes our aspirants who are always hungry for more knowledge. We are here with our Free Chemistry QBank for Polytechnic Exams to help our students to practice regularly and perform at best of their ability in their exams.

Instruction to Create Question Set :-

1. The Test Paper is AI generated.

2. On clicking the button below the AI bot creates a set of 20 Questions from the pool of questions that is being updated regularly by our expert faculties.

3. A Timer is set for each Test Set, once time is up the AI will automatically submit the test.

4. New Question Set can be created by going backwards and repeating the above steps.

Note :- Number of Questions and Timer is not customizable in Free QBanks.

Results

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#1. The condition for the formation of ionic bond between two atoms

Electonegativity differnce is less than 1.9

Electonegativity difference is greater than 1.9

Similar electropositivity

Atom of same size

#2. which of the following elements is bigger in size compared to others?

#3. Which of hte following molecules does not obey octet rule ?

NH3

H2O

CH3

BeCl2

#4. When a metal oxide reacts with an acid, the products formed are

Base + Water

Only Water

salt

salt + Water

#5. The process of heating an ore in the absence of air is

Roasting

Smelting

Calcination

Corrosion

#6. The number of lone pair electrons present in the valence shell of central atom of water molecule is

#7. Bronze is an alloy of

Cu and Pb

Cu and Sn

Cu and Zn

Cu and Ti

#8. Which one of the following is caused due to " screening effect " ?

Increase in Nuclear Charge

Increase in Ionisation Energy

Decrease in Atomic Size

Decrease in Ionisation Energy

#9. The precipitation formed when silver nitrate solution reacts with sodium chloride solution is

Ag(OH)2

AgCl

None

NaOH

#10. Gases evolved when sodium carbonate reacts with hydrocholoric acid

Chlorine

Carbon dioxide

Hydrogen

all of these

#11. The ability of metals to be drawn in to thin wires is called

Sonorous

Malleability

Conductivity

Ductility

#12. Aqueous solution of sodium chloride is called

Baking Soda

Brine

Washing Soda

Milk of magnesia

#13. Modern periodic table has __________ periods

#14. In which one of the following, bond angle is minimum ?

CH4

NH3

BF3

BeCl2

#15. The atmosphere of venus is made up of thick white and yellowish clouds of

HSO3

HNO3

H2SO4

HCl

#16. The melting point of pure ethanoic acid is

290K

298K

300K

310K

#17. For the hydrogenation of vegetable oils _________ is used as catalyst

#18. On passing of excess of carbon dioxide through lime water ________ is obtained.

CaCO3

Ca(HCO3)2

CaH2

Ca(OH)2

#19. M shell of chlorine contains _________ electrons.

#20. Our stomach produces __________acid which helps in digestion.