Science Sample Paper's Question

Science Sample Paper 

Questions

2 marks Questions.

You are watching this sample paper on Educbse (The platform of learning)

1.

i.How done in moving a charge of 3C across two points having a potential difference of 15V?

ii. Find the equivalent resistance between A and B.

2.State the difference between sperm and ovum.

3 While diluting an acid ,why is it advised that the acids should be added to water and not water to the acid?

4.The gas X reacts with lime water to give a compound Y ,which is used as a bleaching agent in chemical industry.

Identify X and Y by giving the chemical equation of the reaction involved .

5.An object of height 4cm is placed on the principal axis  of concave mirror of focal length 20 cm. If the virtual image is formed by the concave mirror at a distance of 10cm from it's pole ,then find the size of the image.

6.Give the electron dot structure of a molecule of a sulphur ,which is made up of eight atoms of sulphur.

7.Explain the process by which the autotrophic organisms fulfill their carbon and energy requirements ?

 

3 marks Questions

1.A household uses the following electric applliances.

i)Refrigerator of rating 400W for 10h each day.

ii)Two electric fans of rating 80W each for 6h daily .

iii)Six electric tubes of rating 18W for 6h daily.

Calculate the electricity bill for the household for month of June ,if cost of electrical energy is 3rs per unit.

2.What is homologous series of organic compounds ? State any two characteristic of a homologous series.

3.State the role of the following in humans respiratory system.

a)Diaphgram

b)Alveoli

c)Nasal hairs.

4.i.Why human females have X-chromosomes in all their gametes.

ii.How the sex of the children will be determined?

iii.Name an organism in which the individuals can change sex.What does this tells us about the sex-determination in such organisms.

5 The absolute refractive indice of glass and water 1.5 and 1.33 respectively .In which medium does light travel faster ?Calculate the ratio of speeds of light in the two media.

6.Discuss the transport system in human beings in detail.

7.How could the modern periodic table remove various anomalies of Mendeleev's periodic table ?

You are watching this sample paper on Educbse (The platform of learning)

8.Analyse the following given statements and present your views on the same .

i)Parthenogenesis is not the same as asexual reproduction.

ii)The male reproductive system is called the urinofenital system.

5marks Questions

1.i.Mention the function of the following structures in the human excretory system.

a)Kidney

b)Urinary bladder

c)Ureter.

d)Urethra

ii.a Define excretion.Write the important functions of the structural and functional unit of the kidney.

b.Write any two functions of artificial kidney.

2.i.Obseve the following incomplete ray diagram of an object,when the image A'B' is formed after refraction from a convex lens .

On the basis of a above information fill in the blanks.

a)The position of object AB would have been ...........

b)Size of the object would have been ........than the size of the image 

ii.Refractive indices of water and glass are 4/3 and 3/2 respectively.A light ray travelling in water is incident on water glass interface at 45°.What is the angle of refraction ?(Take sin 38.9=0.6284)

3.Explain the phenomenon of dispersion of white light through a glass prism using suitable ray diagram.

4.a)On heating blue coloured powder of copper (II) nitrate in a boiling tube,copper oxide (black),oxygen gas and brown gas X is formed.

i)Write a balanced chemical equation of the reaction .

ii) Identify the brown gas X evolved.

iii) Identify the type of reaction.

iv)What could be the pH range of the aqueous solution of the gas X?

b)The carbonate of metal X is a white solid.It decomposes when heated to form carbon dioxide and a yellow solid oxide .What is metal X?

5 An iron salt A reacts with NaOH to form a green percipitate .Another iron salt B reacts with NaOH to form a brown percipitate . Identify the iron salts,A and B along with their colours and write the reaction involved .

You are watching this sample paper on Educbse (The platform of learning)

Thanks 

By Anuranjan Gadekar

*********