Subject

Chemistry

Class

ICSE Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
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 Multiple Choice QuestionsMatch The Following

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1.

Match the following :

A. Urea (i) Aldol
B. Acetaldehyde (ii) Free Radicals
C. Homolytic Fission (iii) Ostwald’s Dilution Law
D. Homolytic Fission (iv) Wohler’s Synthesis
E. Weak Electrolyte (v) Ammoniacal AgNOs
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 Multiple Choice QuestionsFill In the Blanks

2.

Fill in the blanks by choosing the appropriate word/words from those given in brackets :

[formaldehyde, acetaldehyde cynohydrin, first, second, independent, proton, tartaric acid, acetone, depends, cathode, anode, neutron, fission, fusion, lactic acid, methyl cynide, tartaric acid, yellow, phenol, helium, white, acetoxime ],

(i) The half life period of a...............order reaction is...............on the concentration of the reactant.

(ii) In a galvanic cell, the movement of electrons in the external circuit is from...............to ................

(iii) Acetaldehyde reacts with HCN to give............... which on hydrolysis gives.............

(iv) A ............... precipitate is obtained on adding iodine and sodium hydroxide to acetaldehyde.

(v) The type of reaction considered to be the principal source of energy in stars is ............... when hydrogen is converted to ................

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 Multiple Choice QuestionsMultiple Choice Questions

3.

Complete the following statements by selecting the correct alternative from the choices given :    

Mesotartaric acid is optically inactive because :

  • It has no chiral carbon atom

  • It has a double bond

  • Of internal compensation

  • Of internal compensation

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4.

Complete the following statements by selecting the correct alternative from the choices given :    

The reaction between X and Y is first order with respect to X and second order with respect to Y. If the concentration of X is halved and the concentration of Y is doubled, the rate of the reaction will be:

  • Same as the initial value

  • Three times the initial value

  • Double the initial value 

  • Double the initial value 

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5.

Complete the following statements by selecting the correct alternative from the choices given :    

The fibre obtained by the condensation of hexamethylene diamine and adipic acid is :

  • Nylon - 6,6

  • Dacron

  • Teflon

  • Teflon

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6.

Complete the following statements by selecting the correct alternative from the choices given :    

The solubility of a gas varies directly with pressure of the gas is based upon :

  • Roult’s Law

  • Henry’s Law

  • Nernst’s Distribution Law

  • Nernst’s Distribution Law

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 Multiple Choice QuestionsShort Answer Type

7. Correct the following statements by changing the underlined part of the sentence. (Do not change the whole sentence) :

Water boils below 100°C by addition of NaCl.
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8. Correct the following statements by changing the underlined part of the sentence. (Do not change the whole sentence) :
The rate constant of a first order reaction is proportional to the concentration of the reactant.
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9. Correct the following statements by changing the underlined part of the sentence. (Do not change the whole sentence) :

Acetone gives a white precipitate on treatment with sodium chloride.

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10. Correct the following statements by changing the underlined part of the sentence. (Do not change the whole sentence) :

Acetaldehyde undergoes Cannizzaro’s reaction on treatment with dilute alkali.

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