9th Special test paper My CBSE guide

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Assignment Chemistry + Physics IX Summative assessment-1

Assignment Chemistry + Physics IX Summative assessment-1 1. You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with well labeled diagram.  2. You want to wear your favorite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster? 3. Comment on the following statements: (a) Evaporation produces cooling. (b) Rate of evaporation of an aqueous solution decreases with increase in humidity. (c) Sponge though compressible is a solid. 4. (a) Conversion of solid to vapour is called sublimation. Name the term used to denote the conversion of vapour to solid. (b) Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion? 5. Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam ...
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Class 10 Assignment Ch-07 – Control and Coordination

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CBSE Class 10 Assignment 6 – Control and Coordination Section A 1. Which of these plant hormones is a growth inhibitor a) Ethylene b) auxin  c) abscisic acid  d) cytokinin 2. Master gland of the body is: a) Testis b) pituitary c) thyroid d) adrenal 3.Which hormone brings about contraction of uterine wall, leading to labour pain? a) Estrogen b) progesterone c) relaxin d) oxytocin 4.People suffering from diabetes mellitus are unable to secrete: a) Insulin b) adrenaline c) thyroxin d) vasopressin 5.The activities of the internal organs are controlled by the: a) Central nervous system b) peripheral nervous system c) Autonomic nervous system d) none of these 6. The gap between two neurons is called a: a) Dendrite b) synapse c) axon d) impulse 7.the brain is responsible for: a) Thinking b) regulating heart beat c) balancing the body d) all the above Section B [Knowledge ] 8.Name the organ responsible for regulation of: a) Metabolism of carbohy...
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10th Mathematics Solved Question Free Download

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8th Science Hots Questions[CBSE Holy faith a b c of Science]

8 th Science: Chapter:  Reproduction and Reaching of adolescence 1. How are human twins produced? Ans: There are two way twins are formed. (a) Twins occur when a single egg is fertilized to form one zygote which then divides into two separate embryos.(b) Twins occur when two separate eggs  are fertilized by two separate sperm. 2. Whose sex chromosomes is responsible for sex of unborn baby, either father’s or mother’s sex hormones. Ans: The sex chromosomes of the father determine the sex of an unborn baby. 3. Why ace and pimple appear in adolescent age of human being? Ans: This is because during puberty the secretion of sweat glands and sebaceous glands (oil glands) increases in the skin. 4. What is Adam’s apple? At puberty, the voice box or the larynx begins to grow. The growing voice box in boys can be seen as bump in the throat called Adam’s apple. 5. Why does reproductive age of women starts from menarche and end at menopause? Women start producing...
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ASSIGNMENT : FIRST TERM (2012-2013) X - CHEMISTRY CHAPTER: ACIDS AND BASES

ASSIGNMENT : FIRST TERM (2012-2013)  X - CHEMISTRY                          CHAPTER: ACIDS AND BASES                       Max Marks: 25 A. Very short answer questions: (1 mark each) (1x 6= 6marks) 1. A calcium compound which is yellowish white powder is used as a disinfectant and also in textile industry. Name the compound. Which gas is released when this compound is left exposed to air ? 2. Which element is common to all acids ? 3. What is common name of water soluble bases ? 4. Write the neutralization reaction between acids and bases in terms of the ions involved. 5. Two solutions A and B have pH values 3.0 and 9.5 respectively. Which of these will turn litmus solution from blue to red and which will turn phenolphthalein from colourless to pink....
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