X MATHS SCIENCE TEST LINEAR EQUATION & CHEMICAL REACTION

M.M. 35                       TEST X MATHS [ LINEAR EQUATION ]                        45 MIN

1.       [5]The auto fare for the first kilometer is fixed and is different from the rate per km for the remaining distance. A man pays Rs 57 for the distance of 15 km and Rs 92 for a distance of 25 km. Find  the auto fare for the first kilometre and for each successive kilometre. [8,3.50 ]

2.    [5]The age of a father is equal to sum of the ages of his 6 children. After 15 years, twice the age       of the father will be the sum of ages of his children. Find the age of the father. [60 ]

3.       [5]The students of a class are made to stand in (complete) rows. If one student is extra in a row, there would be 2 rows less, and if one student is less in a row, there would be 3 more rows. Find the number of students in the class. [60 ]

4.      [5]3 men and 4 boys can do a piece of work in 14 days, while 4 men and 6 boys can do it in 10 days. How long would it take 1 boy to finish the work? [ 140 ]

5.      [5]Sheela travels, 300 km to her home partly by train and partly by bus. She takes 4 hours if she travels 60 km by train and the remaining by bus. If she travels 100 km by train and the remaining by bus/ she takes 10 minutes longer. Find the speed of the train and the bus separately.[ 60, 80 ]

6.      [5]A train covered a certain distance at a uniform speed. If the train had been 30 km/hr faster, it would have taken 2 hours less than the scheduled time. If the train were 15 km/hr slower, it would have taken 2 hours more than the scheduled time. Find the length of the journey. [ 360]

7.    [5]A boat goes 30 km up stream and 44 km down stream in 10 hours. In 13 hours, it goes 40 km up stream and 55 km down stream. Find the speed of the stream and that of the boat in still water. [ 3,8]

M.M. 15                  TEST X- SCIENCE [ LINEAR EQUATION ]                        25 MIN

1.       [3] Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.

2.       [2] What does one mean by exothermic and endothermic reactions? Give examples.

3.       [2] Explain the following terms with one example each. How we can prevent these.

(a) Corrosion

(b) Rancidity

4.    [8] Write the balanced chemical equation for the following and identify the type of reaction in each case.

(a) Potassium bromide(aq) + Barium iodide(aq)→Potassium iodide(aq) + Barium bromide(s)

(b) Zinc carbonate(s)→Zinc oxide(s) + Carbon dioxide(g)

(c) Calcium hydroxide + Carbon dioxide→   Calcium carbonate + Water

(d) Magnesium(s) + Hydrochloric acid(aq)→Magnesium chloride(aq) + Hydrogen(g)

(e) Zinc Oxide(s) + Carbon s) → Zinc + Carbon monoxide

(g) Lead Nitrate(s) → Lead Oxided + NO₂ + Oxygen

(h) Ferrous Sulphate(s) →  Ferric Oxide + Sulpher dioxide + Sulpher tri oxide

X CHEMICAL REACTION ASSIGNMENT

1.           Give an example of an exothermic reaction.                                                                          

2.           Write  electronic configuration of an element having atomic  number 13

3.           “Oxidation and  reduction processes occur simultaneously.”  Justify this statement with the help  of an example.

4.           “Barium chloride reacts  with  aluminium sulphate to give  aluminium chloride and  a precipitate of barium sulphate”

a.    Translate the  above  statement into  a chemical  equation.

b.    State two  types  in which  this  reaction can be classified.

5.           “A solution of potassium chloride when mixed  with silver  nitrate  solution, an insoluble white  substance is formed”.

a.       Translate the  above  statement into  a chemical  equation.

b.       State two types for this  reaction.

6.           Design an activity  to show a decomposition reaction in which light is used to decompose a reactant. Write  chemical  equation of the reaction and  state  its one use.

7.           State  the  reason why                                                                                                   

 (i)     an iron strip  dipped in a blue copper sulphate solution turns the blue solution pale  green.

(ii)     zinc is used  in the galvanisation of iron  and  not the copper.

8.           Why do we store silver chloride in dark coloured bottles?  Explain in brief.                           

9.           Draw a labelled schematic diagram to show the electrolysis of water.  Why is the amount of gas collected  in one of the test tubes  in this activity  double of the amount collected  in the other  ?

10.        What  happens when chlorine is passed over  dry  slaked time? Write  chemical  equation of the reaction involved.  Mention three  properties of the product.

11.       What  is meant by skeletal  equation ?                                                                                                

12.       What  is meant by thermal decomposition reaction ?  Explain  with  an example.                 

13.       An aluminium can is used  to store Ferrous sulphate solution. It is observed that in few days  holes  appeared in the can.   Explain  the observation and  write  chemical  equation to support your  answer.

14.       Give  three  differences between displacement and  double displacement reaction.               

15.       If copper  metal  is heated over  a flame,  it develops a coating.   What  is the  colour  and composition of this coating  ?

16.       What  change  will you observe if white  silver  chloride is placed  in sunlight ?  Write  an equation for the reaction and  the type  of the reaction.

17.       What  is Redox reaction ?  Identify the substance oxidised and  the substance reduced in the following reactions :

(i)      MnO₂ + 4HCl  →   MnCl₂  +2H₂O + Cl₂

(ii)     Cu0 +H₂  →   Cu +H₂O

18.       What  is the brown coloured gas evolved when lead nitrate crystals  are heated in  a dry test tube  ?

19.       Write  balanced equations for the reaction of :                                                                               

(a)     Iron  with  steam

(b)     Calcium with  water.

20.       On mixing  solutions of lead  nitrate and  potassium iodide in a test tube.                                   

(a)     Write  the chemical  equation involved in the balanced form.

(b)     What  is the colour  of the precipitate ?  Name  the precipitate.

21.       (a)     Write  one equation each  for decomposition reaction when energy is supplied in the form  of :      

 (i) heat                  (ii) light

(b)     Account for the  following.

(i)      Paint  is applied on iron  articles.

(ii)     Oil and  fat containing food  items  are flushed  with  nitrogen.

(iii)    When  an  iron  nail  kept  in  copper sulphate solution, blue  colour  of the solution fades  and  iron  nail becomes  brownish.

OR

(a)     What  do you  mean  by                                                                                                               

(i)      precipitation reaction (ii)     exothermic reaction (iii)    oxidation reaction

Write  balanced chemical  equation.

22.       A solution of potassium chloride when  mixed  with  silver  nitrate solution, an insoluble white  substance is formed.  Write  the chemical  reaction involved and  also mention the type  of the chemical  reaction ?

23.       Why do we store  silver  chloride in dark  coloured bottles  ?                                                     

24.       A magnesium ribbon  is burnt in oxygen  to give a white  compound X accompanied by  emission of light.

(a)     Write  the chemical  formulae of X

(b)     Write  a balanced chemical  equation, when X is dissolved in water.

X MATHS LINEAR EQUATION (WORD PROBLEM ) TEST

M.M. 25                                                    X – MATHS  [TEST LINEAR EQUATION]

  

1.       A part of monthly hostel charges is fixed and remaining depends on the number of days one has taken food in the mess. When a student A takes food for 20 days she has to pay Rs 1000 as hostel charges whereas a student B, who takes food for 26 days, pays Rs 1180 as hostel charges. Find the fixed charges and the cost of food per day. [400,30  ]

2.      3 men and 4 boys can do a piece of work in 14 days, while 4 men and 6 boys can do it in 10 days. How long would it take 1 boy to finish the work? [ 140 ]

3.      The students of a class are made to stand in (complete) rows. If one student is extra in a row, there would be 2 rows less, and if one student is less in a row, there would be 3 more rows. Find the number of students in the class. [60 ]

4.      The sum of the numerator and the denominator of a fraction is equal to 7. Four times the numerator is 8 less      than 5 times the denominator. Find the fraction.                

OR                                                          [3/4  ]

A man has certain notes of denominations Rs 20 and Rs 5 which amount to Rs 380. If the number of notes of each kind are interchanged, they amount to Rs 60 less as before. Find the number of notes of each denomination. [16, 20 ]

5.      A two digit number is such that the ten's digit exceeds twice the unit's digit by 2 and the number obtained by inter-changing the digits is 5 more than three times the sum of the digits. Find the two digit number.        

OR[83]

The sum of a two digit number and the number obtained by reversing the digits is 66, If the digits of the number differ by 2, find the number. How many such numbers are there? [24,42,2 ]

TIME : 1HR 20 MIN                     X TEST [ELECTRICITY & LINEAR EQUATION]           M.M: 20 +  20

1.       [2]A current of 4 A passes through a resist. of 100 Ω for 15 minutes. Calculate the heat produced in calories.                                                                                                                                                                                                     

2.       [3]Define : 1 amere , 1volt and 1kW.hr

3.       [1]Which of the following has more resistivity?   “A thick wire or a thin wire of the same material.”

4.       [3]How many bulbs of resistance 6 ohms should be joined in parallel to draw a current of  2 amperes from a battery of  3 volts?                                                                                                                                                                                                                                     

5.       [3]A uniform wire of resistance R is cut into three equal pieces, and these pieces are Joined in parallel. What is the resistance of the combination? 

6.       [4] Consider the circuit shown in figure (. The voltmeter on the left reads 10 V and that on the right reads 8 V. Find

(a) the current through the resistance R,                                                                                                                              

(b) the value of R, and                                                                                                                                   

(c) the potential difference across the battery.                  

                                 

7.       [4] Consider the circuit shown in figure  . Calculate the current through the 3 Ω resistor. Also calculate potential drop across 4 Ω  resistor.       

  

MATHS

1.          [4]A two-digit number is such that the product of its digits is 18. When 63 subtracted from the number, the digits interchange their places. Find the number.                                                                                        

2.          [4]A two-digit number is such that the sum of its digits is 8. When 18 is subtracted from the number, the digits interchange their places. Find the number.                                                                                        

3.          [4]The age of father is 3 years more than three times the age of his son. Three years hence, father's age will be 10    years more than twice the age of the son. Determine their present ages.

4.          [4]2 women and 5 men can together finish an embroidery work in 4 days, while 3 women and 6 men can finish it in 3 days. Find the time taken by 1 woman alone to finish the work, and also that taken by 1 man alone.

5.          [4]A lending library has a fixed charge for first three days and an additional charge for each day thereafter. Sonu paid Rs 27 for a book kept for seven days, while Rani paid Rs 21 for a book kept for 5 days. Find the fixed charge and the charge for each extra day .

HOME WORK tuesday[ submit on TUESDAY]

1.          The taxi charges in a city consist of a fixed charge together with the charge for the distance covered. For a distance of 10 km, the charge paid is Rs 105 and for a journey of 15 km, the charge paid is Rs 155. What are the fixed charges and the charge per km? How much does a person have to pay for travelling a distance of 25 km?

2.          A fraction becomes 9/11, if 2 is added to both the numerator and the denominator. If, 3 is added to both the numerator and the denominator it becomes 5/6. Find the fraction.

3.          Five years hence, the age of Jacob will be three times that of his son. Five years ago, Jacob’s age was seven times that of his son. What are their present ages?

4.       B₁, B₂ and  B₃ are three  identical(same) bulbs  connected as shown in the Figure.  When  all the three  bulbs  glow,  a current of 3A is recorded by the ammeter A.

(a) What  happens to the glow  of the other  two  bulbs  when  the bulb  B₁ gets fused ? Why?

(b)What  happens to the reading of A₁,  A₂, A₃ and  A when  the bulb  B₂ gets fused? Why ?

X MATHS REAL NUMBER, POLYNOMIAL, LINEAR EQN 3

X MATHS REAL NUMBER, POLYNOMIAL, LINEAR EQN 2

X MATHS NUMBER SYSTEM, POLYNOMIAL & LIN.EQN- 1