45 solutions available
Question 1Identify the product which represents the solid state in the below reaction.Barium chlorideBarium sulphateSodium chlorideSodium sulphate
Question 2The colour of the solution observed after 30 minutes of placing zinc metal to copper sulphate solution isBlueColourlessDirty greenReddish...
Question 3Mild non-corrosive basic salt isCa(OH)2NaClNaOHNaHCO3
Question 4On adding dilute sulphuric acid to a test tube containing a metal 'X', a colourless gas is produced when a burning match stick is brought...
Question 5Which one of the following correctly represents Sodium oxide?
Question 6An element with atomic number ............... will form a basic oxide.7 (2,5)17 (2,8,7)14 (2,8,4)11 (2,8,1)
Question 7An element 'M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of 'M' is:10121418
Question 8Generally food is broken and absorbed within the body of organisms. In which of the following organisms is it done outside the...
Question 9Receptors are usually located in sense organs. Gustatory receptors are present intonguenoseeyeear
Question 10A farmer wants to grow banana plants genetically similar enough to the plants already available in his field. Which one of the following...
Question 11Height of a plant is regulated by:DNA which is directly influenced by growth hormone.Genes which regulate the proteins directly.Growth...
Question 12A sportsman, after a long break of his routine exercise, suffered muscular cramps during a heavy exercise session. This happened due...
Question 13An object is placed in front of a convex mirror. Its image is formed :at a distance equal to the object distance in front of the mirror.at...
Question 14When light enters the atmosphere it strikes on extremely fine particles, which deflect the rays of light in all possible directions, This...
Question 15In 1987, an agreement was formulated by the United Nations Environment Programme (UNEP) to freeze the production of “X” to prevent...
Question 16Which of the following features relates to biodegradable substances?Broken down by biological processesRemain inertPersist in environment...
Question 17Assertion: Rusting of Iron is endothermic in nature.Reason: As the reaction is slow, the release of heat is barely evident.Both A and R...
Question 18Assertion: Probability of survival of an organism produced through sexual reproduction is more than that of organism produced through...
Question 19Assertion : A compass needle is placed near a current carrying wire. The deflection of the compass needle decreases when the magnitude of...
Question 20Assertion: Biodegradable substances result in the formation of compost and natural replenishment.Reason: It is due to breakdown of complex...
Question 21Dil. HCl is added to Zn granules. How will you prove that chemical change has taken place here? Support your response with two arguments.
Question 22State the post-fertilisation changes that lead to fruit formation in plants.
Question 23(a)What is the purpose of making urine in the human body? Name the organs that stores and releases the urine.
Question 23(b)Why do arteries have thick and elastic walls whereas veins have valves?
Question 24The refractive indices of three media are given below:MediumRefractive IndexA1.6B1.8C1.5A ray of light is travelling from A to B and...
Question 25(a)A piece of wire of resistance R is cut into three equal parts. These parts are then connected in parallel. If the equivalent resistance...
Question 25(b)Refer to the image below and state how the magnetic field pattern indicates regions where the magnetic field is stronger outside the...
Question 26Study the food chain given below and answer the questions that follow(a) If the amount of energy available at the third trophic level is...
Question 27The given reaction shows one of the processes to extract the metals like Iron and Manganese.MnO2 (s) + Al(s) ⟶ Mn(l) + Al2O3(s) + Heat(a)...
Question 28(a)An element 'M' with electronic configuration 2 8 3 combines separately with Cl-, SO4-2 anions. Write the chemical formulae of the...
Question 28(b)A reddish-brown metal 'X', when heated in air, gives a black compound 'Y', which when heated in presence of H2 gas gives 'X' back. 'X'...
Question 29We are advised to take iodised salt in our diet by doctors. Justify it's importance in our body.
Question 30What is the probability of a girl or a boy being born in a family? Justify your answer.
Question 31(i) Explain why the refractive index of any material with respect to air is always greater 1.(ii) In the figure below a light ray travels...
Question 32(i) State the law that explains the heating effect of current with respect to the measurable properties in an electrical circuit.(ii) List...
Question 33Anannya responded to the question: Why do electrical appliances with metallic bodies are connected to the mains through a three pin plug,...
Question 34(a)(a) Rehmat classified the reaction between Methane and Chlorine in presence of sunlight as a substitution reaction. Support Rehmat's...
Question 34(b)Raina while doing certain reactions observed that heating of substance 'X' with vinegar like smell with a substance 'Y' (which is used...
Question 35(a)Given below are certain situations. Analyze and describe its possible impact on a person:a) Testes of a male boy are not able to...
Question 35(b)a) A doctor has advised Sameer to reduce sugar intake in his diet and do regular exercise after checking his blood test reports. Which...
Question 36(a)The below image shows a thin lens of focal length 5 m.(i) What is the kind of lens shown in the above figure?(ii) If a real inverted...
Question 36(b)A 10 cm long pencil is placed 5 cm in front of a concave mirror having a radius of curvature of 40 cm.(i) Determine the position of the...
Question 37The table given below shows the hints given by the quiz master in a quiz.S. No.HINT(i)Substance 'C' is used as a preservative.(ii)'C' has...
Question 38Figures (a) to (d) given below represent the type of ear lobes present in a family consisting of 2 children – Rahul, Nisha and their...
Question 39Vinita and Ahmed demonstrated a circuit that operates the two headlights and the two sidelights of a car, in their school exhibition....