Sample Paper 1 for Class 10 Science with answers based on the latest CBSE Sample Papers issued for first term examination November-December 2021. The complete paper is divided in three sections named Section A, B and C. Section A and B contains 24 questions each, out of which 20 are to be attempted and the Section C contains 12 question to attempt any 10 only. Students can see these in general instructions given below.
Class 10 Science Sample Paper 1 with Answers
Time: 90 Minutes
Max. Marks: 50
- The Question Paper contains three sections.
- Section A has 24 questions, Attempt any 20 questions.
- Section B has 24 questions, Attempt any 20 questions.
- Section C has 12 questions, Attempt any 10 questions.
- All questions carry equal marks.
- There is no negative marking.
During the preparation of hydrogen chloride gas, the gas is usually passed through
Calcium phosphate is present in tooth enamel. Its nature is
What is the pH value of saliva after meal?
Name the chemicals used in acid fire extinguisher?
Which of the following statement is correct for the water with detergent dissolved in it?
Which of the following gases can be used for the storage of fresh sample of an oil (which we use for eating or frying purpose) for a long time?
In which of the following chemical equations, the abbreviation represent the correct states of the reactants and products involved at reaction temperature?
The reaction 2HNO₃ + Ca(OH)₂ –> Ca(NO₃)₂ + 2H₂O is an example of
Dilute hydrochloric acid is added to granulated zinc taken in a test tube. The following observation are recorded. Point out the correct observation:
On heating a blue coloured powder of copper (II) nitrate in a boiling tube, a black substance X, Oxygen gas and a brown gas Y was formed. Identify the products correctly:
Which is the first enzyme to mix with food in the digestive tract?
What happens during digestion of carbohydrates?
Rahul took some freshly prepared lime water in two test tubes marked A and B. He blew air through the lime water in test tube A. He then uses a syringe and passed air through the fresh lime water in test tube B.
[I] The amount of carbon dioxide in atmospheric air and excelled air are equal.
[II] Exhaled air contains more carbon dioxide as compared to atmospheric air
[III] Atmospheric air contains more carbon dioxide gas as compared to exhaled air.
[IV] Lime water turned milky immediately in both the test tubes A and B.
Select the incorrect set of observation from the statements given below
The air passage does not collapse while going into the lungs
The excretory system of human beings includes
The digested food stores in plants in the form of
A parallel beam of light, parallel to principle axis of a concave mirror, after reflection passes through
The angle between the incident and reflected rays is 90°. If the plane mirror is rotated by 10° about point-O in the anti-clockwise direction, then the angel between incident and reflected rays will be
Magnification produced by a rear view mirror fitted in vehicles
The apparent depth of the fish in water is
A student determines the focal length of a device “X” by focusing the image of a distant object on a screen placed 20 cm from the device on the same side as the object. The device X is
Magnification produced by a rear-view mirror fitted in vehicles
Aqua regia is a yellow orange fuming liquid, so named by alchemists because it can dissolve the noble metals gold and platinum, though not all metals. The composition of aqua-regia is
The student performing this activity noted the following observation on the colour of flame observed when the metal is burnt. Select the Metal and Colour of flame
The correct chemical equation describing the thermite process is
The correct arrangement of metals Mg, Zn, Fe and AL in decreasing order of their reactivity with dilute acids is
What happens when zinc metal is added to a test tube containing Al₂(SO₄)₃ solution?
Question No. 31 to 35 consists of two segments – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Assertion [A]: Baking soda creates acidity in the stomach. Reason [R]: Baking soda is alkaline.
Assertion [A]: After white washing the walls, a shiny white finish on walls is obtained after two to three days. Reason [R]: Calcium oxide reacts with carbon dioxide to form calcium hydrogen carbonate which gives shiny white finish.
Assertion [A]: A mineral is called ore, when metal is extracted from it conveniently and economically. Reason [R]: All are minerals but all minerals are not ores.
Assertion [A]: In human heart, there is no mixing of oxygenated and deoxygenated blood. Reason [R]: Valves are present in the heart which allows the movement of blood in One Direction only.
Assertion [A]: If the rays are diverging after emerging from a lens, the lens must be concave. Reason [R]: The convex lens can give diverging rays.
Name the material “X” filled in the small test tube and the material “Y” placed at the bottom of the conical flask.
Find out the incorrect differences between aerobic respiration and anaerobic respiration.
In Cloudy days situation, what happens to the “photosynthesis”?
Which statement is valid conclusion based on the information
The force that blood exerts against the wall of a vessel is
Water will be absorbed by the root hairs when the external medium is
Root pressure is maximum when
Your school laboratory has one large window. To find the focal length of a concave mirror using one of the walls as screen, the experiment may be performed
In order to determine the focal length of a concave mirror by obtaining the image of a distant object on screen, the position of the screen should be
A student has focussed on the screen a distant building using a convex lens. If he has selected a blue coloured building as object, select from the following options the one which gives the correct characteristics of the image formed on the screen.
You are given water, mustard oil, glycerine and kerosene. In which of these media, a ray of light incident obliquely at some angle would bend the most? (Refractive index of water=1.33, Mustard oil=1.46, Glycerine=1.473, Kerosene= 1.44)
A Student carries out the experiment of tracing the path of a ray of light through a rectangular glass slab for two different values of angle of incidence ∠i = 30° and ∠i = 45°. In the two cases the student is likely to observe the set of values of angle of refraction and angle of emergence as
What happens when calcium is treated with water? (i) it does not react with water (ii) it reacts violently with water (iii) it reacts less violently with water (iv) bubbles of hydrogen gas formed stick to the surface of calcium
Section – C consists of three Cases followed by questions. There are a total of 12 questions in this section. Attempt any 10 questions from this section.
The first attempted 20 questions would be evaluated.
Case – 1
The reaction between MnO₂ with HCl is depicted. It was observed that a gas with bleaching abilities was released.