Assignments for First Term Class —X. Q3 Which of the following is used to stain leaf peel. Q4 Which one of the following is correct. Q9 Which is incorrect from the following. Q10 What will be the observations if cotton is plugged instead of cork in the conical flask.
Students must free download and practice these worksheets to gain more marks in exams. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education.
Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning. Here is the news which all students are waiting for. This announcement also includes the areas As CBSE has issued instructions for all teachers to stay at home, CBSE has also issued fresh instructions for teachers to prepare study material for students.
CBSE has asked teachers to prepare online study material including videos which can be shared with students The deferred exams include two in English Literature for standard X.
There are in total 86 affected centres in Scroll down for PDF Biology. Click to View or Download pdf file. For more study material for Biology please click here - Biology.
Previous Pause Next. Printable Assignments Download Class 10 Biology assignments. Read More. Search keywords Search.All the questions are thoroughly solved.
Such questions may be asked in 1 markers or 3 markers set. So to acquaint with some important practical concepts, you can practice the questions provided below. A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. Also, write chemical equation for the reaction. Mention the essential material chemicals to prepare soap in the laboratory.
Test to determine the nature of reaction mixture: When a red litmus paper is dipped in the reaction mixture, the paper changes its colour to blue. Hence, the reaction mixture of the saponification reaction is basic in nature. Write two precautions to be taken while identifying different parts of an embryo of a dicot seed. A student is to conduct an experiment to show CO 2 is released during respiration.
A student focuses the image of a candle flame, placed at about 2 m from a convex lens of focal length 10 cm, on a screen. After that he moves gradually the flame towards the lens and each time focuses its image on the screen. A virtual image is formed behind the candle on the same side of the screen.
A student dropped few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was then passed through lime water. What change would be observed in lime water?
Important Questions for Class 12 Biology
Write balanced chemical equation for both the change observed? When dilute HCl is added to marble which is calcium carbonate, it forms calcium chloride, water and carbon dioxide. The chemical equation for the reaction is as follows:. An incomplete ray diagram is shown below where the image A'B' for an object AB placed somewhere in front of lens is formed after refraction through the convex lens. What happens when ethanol is heated with acidified potassium dichromate solution?
Write the chemical equation. Ethanol is oxidised to ethanoic acid with the help of acidified K 2 Cr 2 O 7. Students were asked to observe the permanent slides showing different stages of budding in yeast under high power of a microscope. Write your observation and chemical equation of the reaction taking place. The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below:.
Draw a path of light ray passing through a prism. Label angle of incidence and angle of deviation in the ray diagram. What do you observe when you drop a few drops of acetic acid to a test tube containing:.Q2 Which substance is added to prevent the tissue from.
Q3 Put the following in correct order. Q6 A student added iodine to an unknown solution, the solution turned blue. Q8 On adding iodine to starch solution, the solution turns.
The tissue must be. Q10 A student was asked to identify collenchyma in the slide. He must look for. Students must free download and practice these worksheets to gain more marks in exams.
Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning.
The Delhi Government takes another step ahead towards Digitalization of the Education Sector by proposing digital attendance in all Delhi Government Schools. As part of the Zero Paperwork Programme the attendance in all Delhi government school to be noted on e-tablets The admit card is available to private as well as regular students.
Private applicants may access the CBSE admit card by submitting their application number, As per the official statement the Board will not conduct Some of the schools in Noida have decided to shut for 3 Days because father of two students in Noida was traced to be infected with the contagious Coronavirus.
The internal exams have also been cancelled in those schools after the virus alarm. A 45 year old male who is Students have been coming up with lot of queries and have lot of questions relating to what are the next steps of CBSE. Please see CBSE notice below. Scroll down for PDF Biology. Click to View or Download pdf file. For more study material for Biology please click here - Biology. Previous Pause Next. Printable Worksheets Download Class 9 Biology assignments.
Concepts Access free concepts, short revision notes, brief explanations, chapter summary and mind maps for Concepts for all important and difficult topics of all Read More. Noida School to Shut For 3 Days Coronavirus Detected Some of the schools in Noida have decided to shut for 3 Days because father of two students in Noida was traced to be infected with the contagious Coronavirus.
Search keywords Search.CC WWW. This book is free of cost and can be distributed freely with due reference. CC All the materials have been written by KV teachers. Attempt all questions. There are 30 multiple choice questions in total. Only one of the options in every question is correct. The question paper consists of two parts — Section A and Section B.
Each of the 20 questions in Section A carries 0. A student observed that the colour of pH paper changes to green when she dipped it in water. She added a few drops of concentrated hydrochloric acid to the water. The colour of pH paper would turn to. Three students measured the focal length of a convex lens using parallel rays from a distant object. All of them measured the distance between the lens and the inverted. Student A saw a sharp image on the screen and labelled the distance as f1.
Student B saw a slightly larger blurred image on the screen and labelled the distance as f2.
Practical Based Questions for Class 10 Science Chemistry
Student C saw a slightly smaller blurred image on the screen and labelled the distance as f3. The relation between the three measurements would most likely be. Four students A, B, C and D carried out measurements of focal length of a concave mirror as shown in the four diagrams. Out of the four circuits shown for studying the dependence of the current on the potential difference across a resistor, the correct circuit is. The plot correctly showing the dependence of the current I on the potential difference V across a resistor R is.Chemistry Practical questions ,revision class10 Science cbse (Hindi)
The voltmeter, ammeter and resistance in the circuit shown have been checked to be correct. On plugging the key, the ammeter reads 0. This could be because. In an experiment on photosynthesis, students were instructed to cover a portion of a leaf of a de-starched potted plant with opaque paper as shown in the figure.
When the starch test was done on the leaves after 4 hours, the result showed no starch in. Students A, B and C were given five raisins each of equal weight. The raisins were soaked in distilled water at room temperature. A removed the raisins after 20 minutes, B after two hours and C after 40 minutes. A student dissolved 1 g of sugar in 10 mL of distilled water in a beaker A.
He dissolved 10 g of sugar in mL of distilled water in beaker B.To study binary fission in amoeba and budding in yeast with the help of prepared slides a binary fission in Amoeba Experiment b budding in yeast with the help of prepared slides.
Conclusion The given slides showed the division of a single cell body into two equal halves. The division of nucleus and cell body are seen which led to the formation of two daughter cells. Hence, the kind of reproduction seen in Amoeba is binary fission. B Budding in Yeast Procedure. Conclusion The given slides showed the small growth bud on yeast. These buds on maturity separates from parent cell and grow as a new organism, hence, yeast shows budding.
Question 1: When an organism divides into two equal halves, what type of reproduction is seen? Question 2: What kind of reproduction is seen in Plasmodium?
Question 3: What type of reproduction is seen in a bacteria when present in unfavourable conditions of reproduction? Question 4: Name one organism that reproduces by regeneration. Question 5: Give one use of yeast. Question 6: What type of reproduction is seen in Amoeba?
Question 1: Name the type of reproduction in which single parent is required. Question 2: Give two examples where budding is seen. Question 3: Name two stages of binary fission. Question 4: Name different types of asexual reproduction. Question 5: Hydra is a multicellular organism, how does it show asexual reproduction? Question 6: What is fission?
Question 7: What are the different types of fission reproduction? Question 8: What is binary fission? Question 9: Name two organisms which reproduce by binary fission.Question 1.
A student dipped a strip of pH paper in distilled water taken in a tube. As expected, the pH paper acquired green colour.
He then dissolved a pinch of common salt in the same tube. What will be the expected change in colour of the pH paper? Answer: There will not be any change in the colour of the pH paper. It will remain green which indicates that the solution has maintained neutral character.
It is a neutral salt and is not expected to bring any change in the pH of distilled water. Question 2. Which solutions is :. Arrange the solutions in increasing order of H-ion concentration. Question 3. Name the acid and base from which the following salts have been formed :.
Question 4. When water is added gradually to a white solid X, a hissing sound is heard and a lot of heat is produced forming the product Y. A suspension of Y in water is applied to the walls of a house during white washing. Write its chemical formula. Answer: a The white solid X is quick lime. Its chemical formula is CaO. Its chemical formula is Ca OH r.
NCERT Class 10 Science Lab Manual Binary Fission in Amoeba and Budding in Yeast
Two drinks P and Q gave acidic and alkaline reactions respectively. One has a pH value of 9 and the other has pH value of 3. Which drink has the pH value of 9? Answer: The solution Q is of alkaline nature. It has a pH value of 9. Question 6. Add 5 mL of five unknown solutions in them. Put a small strip of universal indicator in each of them. Predict the nature of the solutions in these from the pH character.
Question 7. Also give the reactions involved.Click on the list to get the details of the experiments for lab manual works.
Chemistry Practical Work SA-II Experiment 1: To study the following properties of acetic acid ethanoic acid : i odour ii solubility in water iii effect on litmus iv reaction with sodium bicarbonate. View Practical Experiment 2: To study saponification reaction for preparation of soap.
Experiment 3: To study the comparative cleaning capacity of a sample of soap in soft and hard water. Experiment 2: To trace the path of a ray of light passing through a rectangular glass slab for different angles of incidence.
Measure the angle of incidence, angle of refraction, angle of emergence and interpret the result. Experiment 3: To trace the path of the rays of light through a glass prism. Experiment 4: To find the image distance for varying object distances in case of a convex lens and draw corresponding ray diagrams to show the nature of image formed.
Experiment 5: To identify the different parts of an embryo of a dicot seed Pea, gram or red kidney bean. Class 10 SA-I Experiments.
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