Enfant India International School Std 10 Ist Unit Test Marks:40 Subject: Chemistry

Attempt all questions :--- (1×5=5)

1. M is an element in the form of a powder .M burns in oxygen and product obtained is soluble in water .The solution is tested with litmus.Write down only the word which will correctly complete each of the following sentences.

(a) If M is a metal, then the litmus will turn _________ .

(b) If M is a non metal , then the litmus will turn _______ .

(c) If M is a reactive metal , then _______ will be evolved when M reacts with dilute sulphuric acid .

(d) If M is a metal ,it will form ______ oxide , which will form _______ solution with water .

(e) If M is a non metal , it will not conduct electricity in the form of _______ .

  2. Give one example in each case :

                                                       (1×5=5)

(a) A basic oxide which is soluble in water .

(b) A hydroxide which is highly soluble in water .

(c) A weak mineral acid

(d) A base which is not an alkali

(e) An oxide which is a base

 3. Define : (2×3=6)

(a) A chemical bond

(b) An electrovalent bond

(c) A covalent bond

   4. What are the conditions for the

        formation of an electrovalent bond ? (3)

    5. Draw electron dot diagram and structure

          of :. (2×3=6)

(a) Nitrogen molecule

(b) Magnesium chloride

(c) Methane

     6. Define a coordinate bond and give the condition for its formation . (5)

  7. Explain the following methods with

            examples. (2×5=10)

(a) Direct combination

(b) Displacement

(c) Double decomposition

(d) Neutralisation of insoluble base

(e) Neutralisation of an alkali

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Enfant India International School Std 9 Ist Unit Test Marks:40 Subject : Chemistry

Sub. -– Chemistry

     Attempt all questions :––

1. Fill in the blank (1×5=5)

(a) The chemical change involving iron and HCl illustrate a _______ reaction.

(b) In the type of reaction called ______ two compounds exchange their positive and negative radicals .

(c) A catalyst either _____ or _____ the rate of a chemical change but itself remains ____ at the end of the reaction.

(d) Formula of iron(3) carbonate is ________ .

(e) Symbolic expression for a molecule is called ______.

   2. Complete and balance the following reactions :. ( 2×5=10)

(a) NaCl(aq) + AgNO3 (aq) ––-->

(b) Pb(NO3 )2 + KI ---–>

                      ∆

(c) CuCO3 –------------>

(d) Pb(NO3)2 –----------->

                   Pt

(e) NH3 +O3 ––---------->

  3. Define the following: (2×5=10)

(a) Photochemical reaction

(b) Electrochemical reaction

(c) Endothermic reaction

(d) Exothermic reaction

(e) Decomposition reaction

  4. What do you understand by chemical.

        reaction ? (3)

  5.State the main characteristics of chemical

       reactions . Give at least one example in

        each case . (3)

  6. What do you understand by hydrolysis ?

      Explain giving examples . (3)

  7. Find the percentage mass of water in the

       Epsom salt MgSO4 . 7H2O . (3)

  8. Explain the terms valency and variable

       valency . (3)

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Enfant India International School Std XII Ist Unit Test Marks:40 Subject : Commerce

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  ISC commerce

Unit – I  2021- 2022

Enfant India International School

       Std.:     XII                                                                             Marks: 40

Answer Question 1 from part I and 4 question from part II

The intended marks for questions are given in bracket [ ]

 

Part I – (12 Marks)

Question 1:- Answer briefly each of the questions (i) to (vi).                                                                    [2*6]        

i. What do you mean by Business Environment?

ii. What is meant by financial planning?

iii. What is meant by participating preference shares?

iv. What is Micro Environment?

v. Give two sources of fixed capital or long term capital.

vi. What are sweat equity shares?

 

Part II – (28 Marks)

Answer any four Questions

                                                                                               

Question 2.

a)   Explain three disadvantages of preferences shares from the investors’ point of view.                                                                      [3]

b)   What is Circulating Capital or Working Capital?                                                                                                                           [4]

 

Question 3.

a)   Explain any three external elements of micro business environment.                                                                                       [3]

b)   Write any four features of equity shares                                                                                                  [4]

 

Question 4.

a)   Enumerate any three components of social environment.                                                                                                           [3]

b)   Explain any four disadvantages of issuing equity shares, from the company’s point of view.                                                            [4]

 

Question 5.

a)   Write three differences between fixed capital and working capital.                                                                                            [3]

b)   Explain any four features of Business Environment.                                                                                                                     [4]

 

Question 6.

a)   What is capital structure?                                                    .                                                                       [3]

b)   Write briefly on Bonus Shares.                                                                                                                   [4]

 

Question 7.

a)   Distinguish between Cumulative preference shares and non-cumulative preference shares                                                          [3]

b)   What is SWOT Analysis?                                                                                                                             [4]

 

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